Bulk properties of rotating nuclei and the validity of the liquid drop model at finite angular momenta |
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| Institution: | 1. Institute of Nuclear Research and Nuclear Energy (Bulgarian Academy of Sciences), Tzarigradsko Chaussee 72, 1784 Sofia, Bulgaria;2. Centre d''Etudes Nucléaires de Bordeaux-Gradignan (IN2P3-CNRS and Université Bordeaux-1), BP 120, 33175 Gradignan-Cedex, France;3. Département de Physique, Université de Sétif, Sétif, Algeria;4. Institut de Recherches Subatomique (IN2P3-CNRS and Université Louis Pasteur), BP20, 67037 Strasbourg-Cedex, France;5. Institut de Physique Nucléaire de Lyon (IN2P3-CNRS and Université Claude Bernard), 43 Boulevard du 11 Novembre 1918, 69622 Villeurbanne-Cedex, France;1. Nuclear Physics Division, Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India;2. Department of Physics, Presidency University, Kolkata 700073, India;3. Nuclear Physics Group, UGC-DAE-Consortium for Scientific Research, Kolkata 700098, India;4. School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China;5. Department of Physics, University of Calcutta, Kolkata 700009, India;6. State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing, 100871, China;7. Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005, India;8. Department of Physics, Indian Institute of Technology (BHU), Banaras 221005, India;9. Department of Physics, Indian Institute of Engineering Science and Technology, Howrah 711103, India;10. Physics Group, Variable Energy Cyclotron Center, Kolkata 700064, India;11. High Energy Nuclear & Particle Physics Division, Saha Institute of Nuclear Physics, HBNI, Kolkata 700064, India;12. Physics Department, Indian Institute of Technology, Kharagpur 721302, India;13. Department of Pure and Applied Physics, Guru Ghasidas Vishayavidyalaya, Bilaspur 495009, India;1. Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People''s Republic of China;2. Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France;3. iThemba LABS, National Research Foundation, PO Box 722, Somerset West 7129, South Africa;4. Department of Physics, University of the Western Cape, Private Bag X17, 7535 Bellville, South Africa;5. School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People''s Republic of China;6. University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014, University of Jyväskylä, Finland;7. Oliver Lodge Laboratory, Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom;8. Department of Mathematical Physics, Lund Institute of Technology,S-22362 Lund, Sweden;9. CERN, CH-1211 Geneva 23, Switzerland;10. Sodankylä Geophysical Observatory, University of Oulu, FIN-99600 Sodankylä, Finland;11. Physics Division, Argonne National Laboratory, Argonne, IL 60439, USA;12. KTH Department of Physics, S-10691 Stockholm, Sweden;13. Institute for Nuclear Research (Atomki-ELKH), 4001 Debrecen, Hungary;14. University of Warsaw, Heavy Ion Laboratory, Pasteura 5a, 02-093 Warsaw, Poland;15. Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;1. Nuclear Physics Institute, Czech Academy of Sciences, 25068 Řež, Czech Republic;2. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA;3. Department of Computer Systems, Faculty of Information Technology, Czech Technical University in Prague, 16000 Praha, Czech Republic;1. Institute of Physics, HBNI, Sachivalaya Marg, Bhubaneswar 751005, India;2. Sambalpur University, Jyoti Vihar, Burla, Sambalpur 768019, India;3. Indian Institute of Technology Indore, Simrol, Indore 453552, India |
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| Abstract: | Out of self-consistent semi-classical calculations performed within the so-called Extended Thomas-Fermi approach for 212 nuclei at all even angular momentum values I ranging between 0 and 80 ħ and using the Skyrme SkM1 effective force, the I-dependence of associated liquid drop model parameters has been studied. The latter have been obtained trough separate fits of the calculated values of the strong interaction as well as direct and exchange Coulomb energies. The theoretical data basis so obtained, has allowed to make a rough quantative assessment of the variation with I of the usual volume and surface energy parameters up to spin of ∼ 30–40ħ. As a result of the combined variation of the surface and Coulomb energies, it has been shown that this I-dependence results in a significant enhancement of the fission stability of very heavy nuclei, balancing thus partially the well-known instability due to centrifugal forces. |
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