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Abstract
Abstract
Some highlight examples on the study of production and chemical properties of heaviest elements carried out mostly at GSI Darmstadt are presented. They focus on the production of some of the heaviest known elements (114Fl, 115Mc, and 117Mc), studies of non-fusion reactions, and on chemical studies of 114Fl. This is the heaviest element, for which chemical studies have been performed to date.
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Urlass S, Beyer R, Junghans AR, Kögler T, Schwengner R, Wagner A. Measurement of the prompt fissionγ-ray spectrum of 242Pu. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201816900026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The prompt γ-ray spectrum of fission fragments is important in understanding the dynamics of the fission process, as well as for nuclear engineering in terms of predicting the γ-ray heating in nuclear reactors. The γ-ray spectrum measured from the fission fragments of the spontaneous fission of 242Pu will be presented here. A fission chamber containing in total 37mg of 242Pu was used as active sample. The γ-quanta were detected with high time- and energy-resolution using LaBr3 and HPGe detectors, respectively, in coincidence with spontaneous fission events detected by the fission chamber. The acquired γ-ray spectra were corrected for the detector response using the spectrum stripping method. About 70 million fission events were detected which results in a very low statistical uncertainty and a wider energy range covered compared to previous measurements. The prompt fission γ-ray spectrum measured with the HPGe detectors shows structures that allow conclusions about the nature of γ-ray transitions in the fission fragments. The average photon multiplicity of 8.2 and the average total energy release by prompt photons per fission event of about 6.8 MeV were determined for both detector types.
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Eberhardt K, Düllmann CE, Haas R, Mokry C, Runke J, Thörle-Pospiech P, Trautmann N. Actinide targets for fundamental research in nuclear physics. ACTA ACUST UNITED AC 2018. [DOI: 10.1063/1.5035526] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Kögler T, Beyer R, Junghans AR, Schwengner R, Wagner A. Determination of the fast-neutron-induced fission cross-section of 242Pu at nELBE. EPJ WEB OF CONFERENCES 2018. [DOI: 10.1051/epjconf/201816900009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The fast-neutron-induced fission cross section of 242Pu was determined in the energy range of 0.5 MeV to 10MeV at the neutron time-of-flight facility nELBE. Using a parallel-plate fission ionization chamber this quantity was measured relative to 235U(n,f). The number of target nuclei was thereby calculated by means of measuring the spontaneous fission rate of 242Pu. An MCNP 6 neutron transport simulation was used to correct the relative cross section for neutron scattering. The determined results are in good agreement with current experimental and evaluated data sets.
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Kögler T, Beyer R, Dietz M, Junghans AR, Lorenz C, Müller SE, Reinhardt TP, Schmidt K, Schwengner R, Takacs MP, Wagner A. Fast-neutron-induced fission of242Pu atnELBE. EPJ WEB OF CONFERENCES 2017. [DOI: 10.1051/epjconf/201714611023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Vascon A, Wiehl N, Runke J, Drebert J, Reich T, Trautmann N, Cremer B, Kögler T, Beyer R, Junghans AR, Eberhardt K, Düllmann CE. Improving material properties and performance of nuclear targets for transmutation-relevant experiments. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-014-3916-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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High-power radioactive targets as one of the key problems in further development of the research program on synthesis of new superheavy elements. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-014-3920-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Junghansa AR, Beyer R, Grosse E, Hannaske R, Kögler T, Massarczyk R, Schwengner R, Wagner A. Fast neutron measurements at the nELBE time-of-flight facility. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159302015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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