The Bezirksliga Württemberg-Baden was the highest association football league in the German states of Württemberg and Baden and the Prussian Province of Hohenzollern from 1923 to 1933. The league was disbanded with the rise of the Nazis to power in 1933.
96-788: The league was formed in 1923, after a league reform which was decided upon in Darmstadt , Hesse . It replaced the Kreisliga Südwest and the Kreisliga Württemberg as the highest leagues in the region. The league started out with eight clubs from the two states and the Prussian province in the region, but without clubs from the Ulm , who were playing in the Bezirksliga Bayern and Mannheim , who played in
192-411: A HCl/O 2 mixture to form a volatile oxychloride. The reaction also produced isotopes of its lighter homologues, technetium (as Tc) and rhenium (as Re). The isothermal adsorption curves were measured and gave strong evidence for the formation of a volatile oxychloride with properties similar to that of rhenium oxychloride. This placed bohrium as a typical member of group 7. The adsorption enthalpies of
288-573: A capital city that it has many architectural testimonies of this period. Many of its major architectural landmarks were created by Georg Moller who was appointed the court master builder of the Grand Duchy of Hesse. Due to the fact that the last ruling Grand Duke of Hesse, Ernst Ludwig was a grandson of Queen Victoria and brother to Empress Alexandra of Russia , the architecture of Darmstadt has been influenced by British and Russian imperial architecture with many examples still existing, such as
384-547: A church presbytery. The most important Catholic Church is St. Ludwig in central Darmstadt. The Russian Chapel in Darmstadt is a Russian orthodox church which is still in use. It was built and used as a private chapel by the last Tsar of Russia, Nicholas II , whose wife Alexandra was born in Darmstadt. Although Russian orthodox churches also exist in other cities outside Russia, the Russian Chapel in Darmstadt
480-406: A five-second half-life (dubnium-257 has a one-second half-life); however, the half-life observed for its parent is much shorter than the half-lives later observed in the definitive discovery of bohrium at Darmstadt in 1981. The IUPAC /IUPAP Transfermium Working Group (TWG) concluded that while dubnium-258 was probably seen in this experiment, the evidence for the production of its parent bohrium-262
576-405: A half-life of one to two milliseconds, and the other with an approximately five-second half-life, were seen. Since the ratio of the intensities of these two activities was constant throughout the experiment, it was proposed that the first was from the isotope bohrium-261 and that the second was from its daughter dubnium -257. Later, the dubnium isotope was corrected to dubnium-258, which indeed has
672-449: A known metastable state . All of these but the unconfirmed Bh decay only through alpha decay, although some unknown bohrium isotopes are predicted to undergo spontaneous fission. The lighter isotopes usually have shorter half-lives; half-lives of under 100 ms for Bh, Bh, Bh, and Bh were observed. Bh, Bh, Bh, and Bh are more stable at around 1 s, and Bh and Bh have half-lives of about 10 s. The heaviest isotopes are
768-407: A major part of the city's economy. It is also home to the football club SV Darmstadt 98 . Alexandra Feodorovna (Alix of Hesse) , the wife of Nicholas II of Russia , as well as Maria Alexandrovna (Marie of Hesse) , the wife of Alexander II of Russia , who were related, were born in this city. The name Darmstadt first appears towards the end of the 11th century, then as Darmundestat . Darmstadt
864-540: A place to research the German language. The academy's annual Georg Büchner Prize , named in memory of Georg Büchner , is considered the most prestigious literary award for writers of German language. Darmstadt is located in the Upper Rhine Plain (German: Oberrheinische Tiefebene), a major rift, about 350 km (217 mi) long and on average 50 km (31 mi) wide, between the cities of Frankfurt in
960-481: A scientist's complete name in the naming of an element. This was opposed by the discoverers as there was some concern that the name might be confused with boron and in particular the distinguishing of the names of their respective oxyanions , bohrate and borate . The matter was handed to the Danish branch of IUPAC which, despite this, voted in favour of the name bohrium , and thus the name bohrium for element 107
1056-575: A separate industry based research educational institution in 1971 and is the largest University of Applied Sciences in Hesse (German: Hessen ) with about 16,500 students. The TU Darmstadt is one of the important technical institutes in Germany and is well known for its research and teaching in the Electrical, Mechanical and Civil Engineering disciplines. Together with other tertiary institutions,
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#17327654092721152-490: A somewhat lower value of 26–27 g/cm . The atomic radius of bohrium is expected to be around 128 pm. Due to the relativistic stabilization of the 7s orbital and destabilization of the 6d orbital, the Bh ion is predicted to have an electron configuration of [Rn] 5f 6d 7s , giving up a 6d electron instead of a 7s electron, which is the opposite of the behavior of its lighter homologues manganese and technetium. Rhenium, on
1248-531: A target and a beam is characterized by its cross section —the probability that fusion will occur if two nuclei approach one another expressed in terms of the transverse area that the incident particle must hit in order for the fusion to occur. This fusion may occur as a result of the quantum effect in which nuclei can tunnel through electrostatic repulsion. If the two nuclei can stay close past that phase, multiple nuclear interactions result in redistribution of energy and an energy equilibrium. The resulting merger
1344-409: A very short distance from a nucleus; beam nuclei are thus greatly accelerated in order to make such repulsion insignificant compared to the velocity of the beam nucleus. The energy applied to the beam nuclei to accelerate them can cause them to reach speeds as high as one-tenth of the speed of light . However, if too much energy is applied, the beam nucleus can fall apart. Coming close enough alone
1440-504: Is a botanical garden maintained by the Technische Universität Darmstadt with a fine collection of rare plants and trees. The Protestant Stadtkirche Darmstadt built in 1369, is in the pedestrian zone of the downtown city center, next to the historic Hotel Bockshaut. The church has gothic elements along with renaissance and baroque , it houses the royal crypt . Hotel Bockshaut was built in 1580 for
1536-566: Is a city in the state of Hesse in Germany, located in the southern part of the Rhine-Main-Area (Frankfurt Metropolitan Region) . Darmstadt has around 160,000 inhabitants, making it the fourth largest city in the state of Hesse after Frankfurt am Main , Wiesbaden , and Kassel . Darmstadt holds the official title "City of Science" (German: Wissenschaftsstadt ) as it is a major centre of scientific institutions, universities, and high-technology companies. The European Organisation for
1632-463: Is a major base for low-cost carrier Ryanair . This airport can only be reached by car or bus. Darmstadt is served by several national and European bus links which connect Darmstadt with other German and European cities. Darmstadt was the capital of an independent country (the Grand Duchy of Hesse ) until 1871 and the capital of the German state of Hesse until 1945. It is due to its past as
1728-443: Is an excited state —termed a compound nucleus —and thus it is very unstable. To reach a more stable state, the temporary merger may fission without formation of a more stable nucleus. Alternatively, the compound nucleus may eject a few neutrons , which would carry away the excitation energy; if the latter is not sufficient for a neutron expulsion, the merger would produce a gamma ray . This happens in about 10 seconds after
1824-556: Is an officially recognised and Church-sponsored University. The sponsors are the Protestant Church in Hesse and Nassau, the Protestant Church of Kurhesse-Waldeck and the social welfare organisation of both Hessian Protestant Churches, the Diakonie Hesse. The EHD has approximately 1,700 students, 40 professors and 10 scientific employees and about 100 visiting lecturers every semester. The city's main professional club
1920-464: Is commonly known by its German name, Jugendstil. The name is taken from the artistic journal, Die Jugend, which was published in Munich and which espoused the new artistic movement. It was founded in 1896 by Georg Hirth (Hirth remained editor until his death in 1916, and the magazine continued to be published until 1940). The magazine was instrumental in promoting the style in Germany. As a result, its name
2016-486: Is expected to be 58 pm (heptavalent manganese, technetium, and rhenium having values of 46, 57, and 53 pm respectively). Pentavalent bohrium should have a larger ionic radius of 83 pm. In 1995, the first report on attempted isolation of the element was unsuccessful, prompting new theoretical studies to investigate how best to investigate bohrium (using its lighter homologs technetium and rhenium for comparison) and removing unwanted contaminating elements such as
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#17327654092722112-534: Is more live music -oriented, is held in the same location every year in May. These two festivals attract 700,000 and 400,000 visitors respectively. Darmstadt has a rich cultural heritage. The Staatstheater Darmstadt dates back to the year 1711. The present building has been in use since 1972 and has three halls which can be used independently. The "Grand Hall" (Großes Haus) provides seats for 956 people and serves as Darmstadt's opera house. The "Small Hall" (Kleines Haus)
2208-420: Is more likely to exist in oxyanions, such as perbohrate, BhO 4 , analogous to the lighter permanganate , pertechnetate , and perrhenate . Nevertheless, bohrium(VII) is likely to be unstable in aqueous solution, and would probably be easily reduced to the more stable bohrium(IV). The lighter group 7 elements are known to form volatile heptoxides M 2 O 7 (M = Mn, Tc, Re), so bohrium should also form
2304-706: Is mostly used for plays and dance and has 482 seats. A separate small hall (Kammerspiele), with 120 seats, is used for chamber plays . Among the museums in Darmstadt the most important are the Hessisches Landesmuseum (Hessian State Museum), the Porcelain Museum (exhibition of the ducal porcelain), the Schlossmuseum (exhibition of the ducal residence and possessions), the Kunsthalle Darmstadt (exhibitions of modern art),
2400-408: Is not enough for two nuclei to fuse: when two nuclei approach each other, they usually remain together for about 10 seconds and then part ways (not necessarily in the same composition as before the reaction) rather than form a single nucleus. This happens because during the attempted formation of a single nucleus, electrostatic repulsion tears apart the nucleus that is being formed. Each pair of
2496-413: Is not found in nature. All known isotopes of bohrium are highly radioactive ; the most stable known isotope is Bh with a half-life of approximately 2.4 minutes, though the unconfirmed Bh may have a longer half-life of about 11.5 minutes. In the periodic table , it is a d-block transactinide element . It is a member of the 7th period and belongs to the group 7 elements as the fifth member of
2592-469: Is the football club SV Darmstadt 98 , who play at the Merck-Stadion am Böllenfalltor . Other, amateur football clubs are 1. FCA Darmstadt and Rot-Weiß Darmstadt . Bohrium Bohrium is a synthetic chemical element ; it has symbol Bh and atomic number 107. It is named after Danish physicist Niels Bohr . As a synthetic element, it can be created in particle accelerators but
2688-531: Is the fifth member of the 6d series of transition metals and the heaviest member of group 7 in the periodic table, below manganese , technetium and rhenium . All the members of the group readily portray their group oxidation state of +7 and the state becomes more stable as the group is descended. Thus bohrium is expected to form a stable +7 state. Technetium also shows a stable +4 state whilst rhenium exhibits stable +4 and +3 states. Bohrium may therefore show these lower states as well. The higher +7 oxidation state
2784-582: The Bezirksliga Rhein instead. The eight clubs played each other in a home-and-away round with the top team advancing to the Southern German championship , which in turn was a qualification tournament for the German championship . For the second and third seasons, 1924–25 and 1925–26, the modus remained unchanged. For the 1926-27 season, the league was expanded to ten teams. The top team
2880-1030: The Gauliga Württemberg and the Gauliga Baden replaced the Bezirksliga as the highest level of play. The clubs from the Bezirksliga Württemberg-Baden did not manage to win a German championship in this era and were dominated by the much stronger competition from the Bezirksliga Bayern . No team from the region qualified for the German championship finals in this era. Source: "Bezirksliga Württemberg-Baden" . Das deutsche Fussball-Archiv . Retrieved 2008-07-24 . Source: "Bezirksliga Württemberg-Baden" . Das deutsche Fussball-Archiv . Retrieved 2008-07-24 . Darmstadt Darmstadt ( German: [ˈdaʁmʃtat] )
2976-524: The WirtschaftsWoche test ranking Germany's high-tech regions. The roots of Darmstadt University of Applied Sciences goes back to 1876 along with Technische Universität Darmstadt (the first electrical engineering chair and inventions fame), when both these Universities were an integrated entities, a need for a separate industry based research educational institution was felt in the early 1930s, finally University of Applied sciences emerged as
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3072-523: The Darmstadt artists' colony , a major centre of the Jugendstil artistic movement, referring both to the group of artists active in the city in the late 19th and early 20th century, as well as the buildings which they designed, together with the Russian Chapel in Darmstadt , was recognized as a World Heritage Site by UNESCO in 2021. Darmstadt was formerly the capital of a sovereign state,
3168-545: The Grand Duchy of Hesse and its successor, the People's State of Hesse , a federal state of Germany. As the capital of an increasingly prosperous duchy , the city gained some international prominence and remains one of the wealthiest cities in Europe. In the 20th century, industry (especially chemicals), as well as large science and electronics (and later, information technology) sectors became increasingly important, and are still
3264-566: The Joint Institute for Nuclear Research in Dubna , Russia had suggested this name be given to element 105 (which was finally called dubnium) and the German team wished to recognise both Bohr and the fact that the Dubna team had been the first to propose the cold fusion reaction, and simultaneously help to solve the controversial problem of the naming of element 105. The Dubna team agreed with
3360-512: The Rhein-Main Metropolitan Area ). The backbone of public transport in Darmstadt is the tram system with 10 lines. Local bus lines also serve all parts of the city and the city is served by regional bus lines. The historically important local airfield August Euler Airfield is closed to aviation at large, being reserved for the use of the Technische Universität Darmstadt . Darmstadt can be easily accessed from around
3456-658: The Rhine-Main S-Bahn , which connects the city to Frankfurt . Within Darmstadt the S3 also stops at stations in Darmstadt-Arheilgen and Darmstadt-Wixhausen . Regional trains also connect six secondary railway stations within Darmstadt, and stations in the surrounding region, with Darmstadt Hauptbahnhof . The extensive public transport system of Darmstadt is integrated in the RMV (the transportation authority of
3552-465: The fission barrier for nuclei with about 280 nucleons. The later nuclear shell model suggested that nuclei with about 300 nucleons would form an island of stability in which nuclei will be more resistant to spontaneous fission and will primarily undergo alpha decay with longer half-lives. Subsequent discoveries suggested that the predicted island might be further than originally anticipated; they also showed that nuclei intermediate between
3648-492: The kinetic energy of the emitted particle). Spontaneous fission, however, produces various nuclei as products, so the original nuclide cannot be determined from its daughters. Two groups claimed discovery of the element . Evidence of bohrium was first reported in 1976 by a Soviet research team led by Yuri Oganessian , in which targets of bismuth-209 and lead -208 were bombarded with accelerated nuclei of chromium -54 and manganese -55 respectively. Two activities, one with
3744-628: The 1931-32 season, both divisions were expanded to ten teams. The top-two teams from each league then advanced to the Southern German finals, which were now staged in two regional groups with a finals game between the two group winners at the end. The same system applied for the final season of the league in 1932-33. With the rise of the Nazis to power, the Gauligas were introduced as the highest football leagues in Germany. In Württemberg-Baden,
3840-784: The 19th and 20th centuries, Darmstadt became home to many technology companies and research institutes, and has been promoting itself as a "city of science" since 1997. It is well known as a high-tech centre in the vicinity of Frankfurt Airport , with important activities in spacecraft operations (the European Space Agency 's European Space Operations Centre , European Organisation for the Exploitation of Meteorological Satellites ), chemistry, pharmacy, information technology, biotechnology, telecommunications (substantial Deutsche Telekom presence) and mechatronics. In 2000, its region also scored Rank 3 amongst 97 German regions in
3936-420: The 6d series of transition metals . Chemistry experiments have confirmed that bohrium behaves as the heavier homologue to rhenium in group 7. The chemical properties of bohrium are characterized only partly, but they compare well with the chemistry of the other group 7 elements. A superheavy atomic nucleus is created in a nuclear reaction that combines two other nuclei of unequal size into one; roughly,
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4032-634: The Darmstadt region is Frankenstein Castle due to claims that the real castle may have had an influence on Mary Shelley's decision to choose the name Frankenstein for her monster-creating scientist. This castle dates back to the 13th century, but it was acquired by the counts of Hesse-Darmstadt in 1662. Darmstadt has a rich tradition in modern architecture. After 1945 several "Meisterbauten" ( Masterful Architectonic Creations ) were built that set standards for modern architecture. These buildings still exist and are used for various public and private purposes. In
4128-413: The Exploitation of Meteorological Satellites (EUMETSAT) and the European Space Agency 's European Space Operations Centre (ESA ESOC) are located in Darmstadt, as well as GSI Centre for Heavy Ion Research , where several chemical elements such as bohrium (1981), meitnerium (1982), hassium (1984), darmstadtium (1994), roentgenium (1994), and copernicium (1996) were discovered. The existence of
4224-454: The German group's naming proposal for element 107. There was an element naming controversy as to what the elements from 104 to 106 were to be called; the IUPAC adopted unnilseptium (symbol Uns ) as a temporary, systematic element name for this element. In 1994 a committee of IUPAC recommended that element 107 be named bohrium , not nielsbohrium , since there was no precedent for using
4320-434: The German variant of Art Nouveau . Also during this period, in 1912 the chemist Anton Kollisch , working for the pharmaceutical company Merck , first synthesised the chemical MDMA (ecstasy) in Darmstadt. Darmstadt's municipal area was extended in 1937 to include the neighbouring localities of Arheilgen and Eberstadt, and in 1938 the city was separated administratively from the surrounding district ( Kreis ). Darmstadt
4416-516: The Luisenplatz with its grand-ducal column, the old Hessian State Theatre (at Karolinenplatz) and the Russian Chapel by Leon Benois . The Russian church, St. Mary Magdalene Chapel, is named in honor of the patron saint of Tsar Nicholas' mother and was built of Russian stone on Russian soil brought to Darmstadt by train. It was used by the Russian imperial family and court during regular visits to
4512-586: The Netherlands, the Baltic states, and Nordic countries. The two main centres for Jugendstil art in Germany were Munich and Darmstadt. The Luisenplatz , the central square of the city, forms the centre of the city and is the main public transport hub. In 1844 the Ludwigsäule (called Langer Lui , meaning Long Ludwig ), a 33-metre (108 ft) column commemorating Ludwig I , first Grand Duke of Hesse ,
4608-535: The TU is responsible for the large student population of the city, which stood at 33,547 in 2004. Darmstadt has nine official 'Stadtteile' ( boroughs ). These are: The current mayor of Darmstadt is Hanno Benz of SPD , who was elected in 2023. The following is a list of mayors since 1945: The Darmstadt city council ( Stadtverordnetenversammlung ) governs the city alongside the Mayor. The most recent city council election
4704-529: The Tsarina's brother and family in Darmstadt. The Residential Palace Darmstadt ( Stadtschloss ) is located in the city centre. It was the residence of the counts of Hesse-Darmstadt , later as Grand Dukes of Hesse by the grace of Napoleon. The rulers of Hesse also owned Jagdschloss Kranichstein , a hunting lodge in Kranichstein which is a nowadays used as a five star hotel. The most famous castle in
4800-450: The alpha decay chain of the produced bohrium atoms to previously known isotopes of fermium and californium . The IUPAC /IUPAP Transfermium Working Group (TWG) recognised the GSI collaboration as official discoverers in their 1992 report. In September 1992, the German group suggested the name nielsbohrium with symbol Ns to honor the Danish physicist Niels Bohr . The Soviet scientists at
4896-470: The catholic secondary school Edith-Stein-Schule , the Adventists ' Schulzentrum Marienhöhe , an anthroposophic Waldorf School , a Comenius School and other faith based private schools. The Technical University of Darmstadt (German: Technische Universität Darmstadt ), commonly referred to as TU Darmstadt, is a prestigious research university in Germany. It was founded in 1877 and received
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#17327654092724992-470: The city was also the location of a subcamp of the Natzweiler-Struthof concentration camp . Several prominent members of the German resistance movement against the Nazis were citizens of Darmstadt, including Wilhelm Leuschner and Theodor Haubach , both executed for their opposition to Hitler's regime. Darmstadt was first bombed on 30 July 1940, and 34 other air raids would follow before
5088-492: The decay products are easy to determine before the actual decay; if such a decay or a series of consecutive decays produces a known nucleus, the original product of a reaction can be easily determined. (That all decays within a decay chain were indeed related to each other is established by the location of these decays, which must be in the same place.) The known nucleus can be recognized by the specific characteristics of decay it undergoes such as decay energy (or more specifically,
5184-906: The exhibition centre Mathildenhöhe, and the Museum Künstlerkolonie ( Art Nouveau museum). The Jazz-Institut Darmstadt is Germany's largest publicly accessible jazz archive. The Internationales Musikinstitut Darmstadt, harboring one of the world's largest collections of post-war sheet music , also hosts the biennial Internationale Ferienkurse für Neue Musik , a summer school in contemporary classical music founded by Wolfgang Steinecke . A large number of avant-garde composers have attended and given lectures there, including Olivier Messiaen , Luciano Berio , Milton Babbitt , Pierre Boulez , Luigi Nono , John Cage , György Ligeti , Iannis Xenakis , Karlheinz Stockhausen , Mauricio Kagel , and Helmut Lachenmann . The Deutsche Akademie für Sprache und Dichtung provides writers and scholars with
5280-421: The experimental value for BhO 3 Cl is −77.8 kJ/mol, very close to the theoretically expected value of −78.5 kJ/mol. Bohrium is expected to be a solid under normal conditions and assume a hexagonal close-packed crystal structure ( / a = 1.62), similar to its lighter congener rhenium. Early predictions by Fricke estimated its density at 37.1 g/cm , but newer calculations predict
5376-430: The fields of electrical, mechanical and civil engineering, architecture, computer science, mathematics and the natural sciences. It also offers courses in economics, law, history, politics, sociology, psychology, sport science and linguistics. It also offers degree courses for teaching positions at German vocational schools and Gymnasiums. The Darmstadt University of Applied Sciences (German: Hochschule Darmstadt ) has
5472-454: The following elements was also confirmed at GSI Centre for Heavy Ion Research : nihonium (2012), flerovium (2009), moscovium (2012), livermorium (2010), and tennessine (2012). The Facility for Antiproton and Ion Research (FAIR) is an international accelerator facility under construction. Darmstadt is also the seat of the world's oldest pharmaceutical company, Merck , which is the city's largest employer. The Mathildenhöhe, including
5568-850: The highest number of industrial linkage programs, compared to the rest of the universities of applied sciences. The roots of University of Applied Sciences Darmstadt dates back to 1876. However, it has not emerged as a separate institution before 1971. As of 2017 it was the largest University of Applied Sciences in the State of Hesse, with about 16,000 students. It offers courses in architecture, chemical engineering, materials science, civil engineering, computer science, design, economics, electrical engineering and information technology, mathematics and science, mechanical engineering, media (including information science and engineering), plastics engineering, social and cultural studies, and several social sciences. The Protestant University of Applied Sciences Darmstadt (EHD)
5664-530: The inhabitants were killed, and 66,000 to 70,000 were left homeless. Over three-quarters of Darmstadt's inner city was destroyed. Post-war rebuilding was done in a relatively plain architectural style, although a number of the historic buildings were rebuilt to their original appearance following the city's capture on 25 March 1945 by the American 4th Armored Division . Today around 30% of Darmstadt consists out of buildings from before World War II. Throughout
5760-516: The initial nuclear collision and results in creation of a more stable nucleus. The definition by the IUPAC/IUPAP Joint Working Party (JWP) states that a chemical element can only be recognized as discovered if a nucleus of it has not decayed within 10 seconds. This value was chosen as an estimate of how long it takes a nucleus to acquire electrons and thus display its chemical properties. The beam passes through
5856-531: The late 1990s the Waldspirale ('Forest Spiral') was built, a residential complex by Austrian Friedensreich Hundertwasser . As an almost surreal building, it is internationally famous for its almost absolute rejection of rectangular forms, down to every window having a different shape, the style being a trademark of Hundertwasser's work. Hundertwasser died before the Waldspirale was finished. Darmstadt
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#17327654092725952-423: The lightest nuclide primarily undergoing spontaneous fission has 238. In both decay modes, nuclei are inhibited from decaying by corresponding energy barriers for each mode, but they can be tunneled through. Alpha particles are commonly produced in radioactive decays because the mass of an alpha particle per nucleon is small enough to leave some energy for the alpha particle to be used as kinetic energy to leave
6048-410: The long-lived actinides and the predicted island are deformed, and gain additional stability from shell effects. Experiments on lighter superheavy nuclei, as well as those closer to the expected island, have shown greater than previously anticipated stability against spontaneous fission, showing the importance of shell effects on nuclei. Alpha decays are registered by the emitted alpha particles, and
6144-584: The main hub for German flag carrier Lufthansa . Frankfurt Egelsbach Airport ( Flugplatz Frankfurt-Egelsbach ) is a busy general aviation airport located 5 km north of Darmstadt, near the town of Egelsbach . Despite the name, Frankfurt Hahn Airport ( Flughafen Frankfurt-Hahn ) is located far outside the Frankfurt Metro Area, approximately 120 km (75 mi) to the west in Lautzenhausen ( Rhineland-Palatinate ). Hahn Airport
6240-462: The more unequal the two nuclei in terms of mass , the greater the possibility that the two react. The material made of the heavier nuclei is made into a target, which is then bombarded by the beam of lighter nuclei. Two nuclei can only fuse into one if they approach each other closely enough; normally, nuclei (all positively charged) repel each other due to electrostatic repulsion . The strong interaction can overcome this repulsion but only within
6336-421: The most stable, with Bh and Bh having measured half-lives of about 2.4 min and 40 s respectively, and the even heavier unconfirmed isotope Bh appearing to have an even longer half-life of about 11.5 minutes. The most proton-rich isotopes with masses 260, 261, and 262 were directly produced by cold fusion, those with mass 262 and 264 were reported in the decay chains of meitnerium and roentgenium, while
6432-419: The neutron-rich isotopes with masses 265, 266, 267 were created in irradiations of actinide targets. The five most neutron-rich ones with masses 270, 271, 272, 274, and 278 (unconfirmed) appear in the decay chains of Nh, Mc, Mc, Ts, and Fl respectively. The half-lives of bohrium isotopes range from about ten milliseconds for Bh to about one minute for Bh and Bh, extending to about 11.5 minutes for
6528-586: The north and Mannheim in the south. Darmstadt's southeastern boroughs are located in the spurs of the Odenwald , a low mountain range in Southern Hesse between the Main and Neckar rivers. Southern Hesse is well known for its mild climate which allows winegrowing on a large scale in the region south of Darmstadt. The weather is often volatile with the summers being warm and humid with frequent thunderstorms,
6624-638: The nucleus. Spontaneous fission is caused by electrostatic repulsion tearing the nucleus apart and produces various nuclei in different instances of identical nuclei fissioning. As the atomic number increases, spontaneous fission rapidly becomes more important: spontaneous fission partial half-lives decrease by 23 orders of magnitude from uranium (element 92) to nobelium (element 102), and by 30 orders of magnitude from thorium (element 90) to fermium (element 100). The earlier liquid drop model thus suggested that spontaneous fission would occur nearly instantly due to disappearance of
6720-580: The other hand, follows its heavier congener bohrium in giving up a 5d electron before a 6s electron, as relativistic effects have become significant by the sixth period, where they cause among other things the yellow color of gold and the low melting point of mercury . The Bh ion is expected to have an electron configuration of [Rn] 5f 6d 7s ; in contrast, the Re ion is expected to have a [Xe] 4f 5d configuration, this time analogous to manganese and technetium. The ionic radius of hexacoordinate heptavalent bohrium
6816-721: The outermost nucleons ( protons and neutrons) weakens. At the same time, the nucleus is torn apart by electrostatic repulsion between protons, and its range is not limited. Total binding energy provided by the strong interaction increases linearly with the number of nucleons, whereas electrostatic repulsion increases with the square of the atomic number, i.e. the latter grows faster and becomes increasingly important for heavy and superheavy nuclei. Superheavy nuclei are thus theoretically predicted and have so far been observed to predominantly decay via decay modes that are caused by such repulsion: alpha decay and spontaneous fission . Almost all alpha emitters have over 210 nucleons, and
6912-416: The oxychlorides are asymmetrical, and they should have increasingly large dipole moments going down the group, they should become less volatile in the order TcO 3 Cl > ReO 3 Cl > BhO 3 Cl: this was experimentally confirmed in 2000 by measuring the enthalpies of adsorption of these three compounds. The values are for TcO 3 Cl and ReO 3 Cl are −51 kJ/mol and −61 kJ/mol respectively;
7008-417: The oxychlorides of technetium, rhenium, and bohrium were measured in this experiment, agreeing very well with the theoretical predictions and implying a sequence of decreasing oxychloride volatility down group 7 of TcO 3 Cl > ReO 3 Cl > BhO 3 Cl. The longer-lived heavy isotopes of bohrium, produced as the daughters of heavier elements, offer advantages for future radiochemical experiments. Although
7104-488: The rest of Germany and Europe through its main railway station, Darmstadt Hauptbahnhof , which is located in the western part of the city centre. The station is part of the Intercity-Express network and also served by other long-distance trains. It is a busy station with 12 platforms and serves as a transportation hub for the southern Hesse/ Odenwald region. Darmstadt Hauptbahnhof is the terminus of S3 of
7200-508: The right to award doctorates in 1899. In 1882 it was the first university in the world to set up a chair in electrical engineering, in 1883 the first faculty for electrical engineering was founded there. The university is organized in 13 departments and 5 fields of study, which all together offer about 100 courses of studies. The fields of study offer interdisciplinary degree courses in which students take lectures in multiple departments. The university, as its title suggests, offers degree courses in
7296-429: The target and reaches the next chamber, the separator; if a new nucleus is produced, it is carried with this beam. In the separator, the newly produced nucleus is separated from other nuclides (that of the original beam and any other reaction products) and transferred to a surface-barrier detector , which stops the nucleus. The exact location of the upcoming impact on the detector is marked; also marked are its energy and
7392-403: The time of the arrival. The transfer takes about 10 seconds; in order to be detected, the nucleus must survive this long. The nucleus is recorded again once its decay is registered, and the location, the energy , and the time of the decay are measured. Stability of a nucleus is provided by the strong interaction. However, its range is very short; as nuclei become larger, its influence on
7488-474: The trivalent actinides , the group 5 elements , and polonium . In 2000, it was confirmed that although relativistic effects are important, bohrium behaves like a typical group 7 element. A team at the Paul Scherrer Institute (PSI) conducted a chemistry reaction using six atoms of Bh produced in the reaction between Bk and Ne ions. The resulting atoms were thermalised and reacted with
7584-457: The unconfirmed Bh, which may have one of the longest half-lives among reported superheavy nuclides. Very few properties of bohrium or its compounds have been measured; this is due to its extremely limited and expensive production and the fact that bohrium (and its parents) decays very quickly. A few singular chemistry-related properties have been measured, but properties of bohrium metal remain unknown and only predictions are available. Bohrium
7680-584: The volatile oxide Bh 2 O 7 . The oxide should dissolve in water to form perbohric acid, HBhO 4 . Rhenium and technetium form a range of oxyhalides from the halogenation of the oxide. The chlorination of the oxide forms the oxychlorides MO 3 Cl, so BhO 3 Cl should be formed in this reaction. Fluorination results in MO 3 F and MO 2 F 3 for the heavier elements in addition to the rhenium compounds ReOF 5 and ReF 7 . Therefore, oxyfluoride formation for bohrium may help to indicate eka-rhenium properties. Since
7776-451: The war's end. The old city centre was largely destroyed in a British bombing raid on 11/12 September 1944. This attack was an example of "area bombing" using high explosive and incendiary bombs, which combined in that attack to create a firestorm, a self-sustaining combustion process in which winds generated by the fire ensure it continues to burn until everything possible has been consumed. During this attack an estimated 11,000 to 12,500 of
7872-457: The winters mostly relatively mild with frequent periods of high fog . Snowfall is most likely in January and February, but mild winters without considerable snowfall can occur. The Darmstadt weather station has recorded the following extreme values: The City of Darmstadt offers students a broad variety of public primary, secondary and tertiary schools. Besides them private schools exist, e.g.
7968-410: The world via Frankfurt Airport ( Flughafen Frankfurt am Main ) which is located 20 km (12 mi) north of central Darmstadt and connected to it via Autobahn 5, S-Bahn , several bus lines and a direct express bus-link (" Airliner "). The airport ranks among the world's busiest airports by passenger traffic and is the second-busiest airport by cargo traffic in Europe. The airport also serves as
8064-827: Was a centre of the Art Nouveau movement . Surviving examples of the Jugendstil period include the Rosenhöhe, a landscaped English-style rose garden from the 19th century, recently renovated and replanted, the UNESCO World Heritage Site Mathildenhöhe , with the Hochzeitsturm ('Wedding tower', also commonly known as the 'Five-Finger-Tower') by Joseph Maria Olbrich , the Russian Chapel in Darmstadt and large exhibition halls as well as many private villas built by Jugendstil architects who had settled in Darmstadt. German Art Nouveau
8160-444: Was adopted as the most common German-language term for the style: Jugendstil ("young style"). Although, during the early 20th century, the word was applied to only two-dimensional examples of the graphic arts, especially the forms of organic typography and graphic design found in and influenced by German magazines like Jugend, Pan, and Simplicissimus , it is now applied to more general manifestations of Art Nouveau visual arts in Germany,
8256-526: Was again qualified for the finals. The runners-up of the Bezirksligas in the south from then on also played a championship round to determine a third team from the region to go to the German finals with the Karlsruher FV from the region qualifying for this. After this season, the league was split into a Württemberg and a Baden group, the first having nine and the second eight teams. No final
8352-615: Was chartered as a city by the Holy Roman Emperor Ludwig the Bavarian in 1330, at which time it belonged to the counts of Katzenelnbogen . The city, then called Darmstait , became a secondary residence for the counts, with a small castle established at the site of the current, much larger edifice. When the house of Katzenelnbogen became extinct in 1479, the city was passed to the Landgraviate of Hesse , and
8448-465: Was held on 14 March 2021, and the results were as follows: Darmstadt is connected to a number of major roads, including two Autobahnen ( Bundesautobahn 5 and Bundesautobahn 67 ). The main road passing west–east is the Bundesstraße 26 , the Bundesstraße 3 runs north–south. The rural areas east of the city in the Odenwald are accessed by several secondary roads. Darmstadt is connected to
8544-497: Was not convincing enough. In 1981, a German research team led by Peter Armbruster and Gottfried Münzenberg at the GSI Helmholtz Centre for Heavy Ion Research (GSI Helmholtzzentrum für Schwerionenforschung) in Darmstadt bombarded a target of bismuth-209 with accelerated nuclei of chromium-54 to produce 5 atoms of the isotope bohrium-262: This discovery was further substantiated by their detailed measurements of
8640-689: Was part of the Royal Gardens used exclusively by the dukes of Darmstadt. Today it is a public park, heavily used in every season of the year. Other important parks are the French style parks Prinz-Georgs-Garten and Orangerie , the modern style Bürgerpark ("People's Park") in northern Darmstadt and the mystical Park Rosenhöhe ("Rose Heights"), which also serves as the cemetery for the dukes and their immediate family, with two impressive mausoleum buildings (Altes Mausoleum and Neues Mausoleum) in its remote parts. The Botanischer Garten in eastern Darmstadt
8736-637: Was placed in the middle of the square. While the column still stands, the square is today surrounded by mostly modern buildings. Other important squares are the Marktplatz (see image) near the old city hall and the Sabaisplatz at the Mathildenhöhe . The city has a high density of parks. Among the most important parks are the English style Herrngarten in central Darmstadt. In former times it
8832-448: Was played between the two group winners as both went on to the Southern German championship. The second and third placed team of each division would also advance to the separate round of the runners-up like in the previous season. The 1928-29 season saw no change in modus but both leagues now operated on a strength of eight clubs. The qualification system for the finals also remained unchanged. This system remained in place until 1931. For
8928-490: Was recognized internationally in 1997; the names of the respective oxyanions of boron and bohrium remain unchanged despite their homophony. Bohrium has no stable or naturally occurring isotopes. Several radioactive isotopes have been synthesized in the laboratory, either by fusing two atoms or by observing the decay of heavier elements. Twelve different isotopes of bohrium have been reported with atomic masses 260–262, 264–267, 270–272, 274, and 278, one of which, bohrium-262, has
9024-432: Was seat of the ruling landgraves (1567–1806) and thereafter (to 1918) of the grand dukes of Hesse . The city's population grew during the 19th century, from a little over 10,000, to 72,000 inhabitants. A polytechnical school, which later became a Technical University now known as TU Darmstadt , was established in 1877. In the early 20th century, Darmstadt was an important centre for the art movement of Jugendstil ,
9120-466: Was the first city in Germany to force Jewish shops to close in early 1933, shortly after the Nazis took power in Germany. The shops were only closed for one day, for "endangering communal order and tranquility". In 1942, over 3,000 Jews from Darmstadt were first forced into a collection camp located in the Liebigschule, and later deported to concentration camps where most eventually died. In 1944,
9216-720: Was the only official Russian church used by the Tsar outside the Russian Empire . It is said that the chapel was built on Russian soil that was brought to Darmstadt exclusively for the purpose of building the Tsar's private chapel on it. Every year on the first weekend of July the Heinerfest festival is held in the streets surrounding the old ducal palace. It is a traditional German festival with music acts, beer halls , amusement rides and booths selling trinkets and food. The similar Schlossgrabenfest [ de ] , which
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