Fragments' mass and energy characteristics in the spontaneous fission of 236Pu, 238Pu, 240Pu, 242Pu,and 244Pu |
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| Affiliation: | 1. CEC, JRC, Institute for Reference Materials and Measurements, B-2440 Geel, Belgium;2. Dept. of Subatomic and Radiation Physics, University of Gent, Proeftuinstraat 86, B-9000 Gent, Belgium;3. Studiecentrum voor Kernenergie, Boeretang 200, B-2400 Mol, Belgium;1. Department of Physics, University of South Africa, P.O. Box 392, Pretoria 0003, South Africa;2. Department of Physics, Presidency University, 86/1 College Street, Kolkata 700 073, India;3. Theoretical Physics Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380009, India;4. Department of Physics, University of Haifa, Kyriat Tivon 36006, Haifa, Israel;1. School of Earth, Atmospheric and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, UK;2. Museum für Naturkunde – Berlin, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, Invalidenstrasse 43, 10115 Berlin, Germany;3. UNINOVA, Universidade Nova de Lisboa, Quinta da Torre, 2829-516 Monte de Caparica, Portugal;4. The Centre for Earth Evolution and Dynamics, Univ. of Oslo, PO Box 1028 Blindern, 3015 Oslo, Norway;1. CEA, DAM, DIF, F-91297 Arpajon, France;2. Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, France;3. Institut d''Astronomie et d''Astrophysique, Université Libre de Bruxelles, Campus de la Plaine CP 226, 1050 Brussels, Belgium;1. Department of Physics, Liaoning Normal University, Dalian 116029, China;2. Department of Physics, Chifeng University, Chifeng 024000, China;3. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803-4001, USA;4. School of Physics, Nankai University, Tianjin 300071, China |
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| Abstract: | The results of a systematic study of the mass and energy of fission fragments emitted in the spontaneous fission of 236,238,240,242,244Pu are reported. A comparison of the fragments' mass and energy distributions demonstrates the occurrence of different fission modes with varying relative probability. These results are discussed in terms of the random neck rupture model as well as in terms of the scission point model, showing the influence of the neutron number of the fissioning system. Finally an improved method of analysis allows the investigation of the cold fission region. |
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