Nuclear level densities and level spacing distributions: Part II |
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| Institution: | 1. Nuclear Physics Department, Taras Shevchenko National University, Kyiv, Ukraine;2. NAPC—Nuclear Data Section, International Atomic Energy Agency, Vienna, Austria;1. Department of Physics and Astronomical Sciences, Central University of Jammu, Samba, J&K-(181143), India;2. Higher Education Department, Government of Jammu and Kashmir, Jammu, J&K, India;3. Department of Physics, University of Jammu, Jammu-(180006), India;4. Department of Physics, University of Kashmir, Srinagar 190006, India;1. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;2. School of Physics, Georgia Institute of Technology, Atlanta, GA 30332, USA;1. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Via Celoria 16, 20133 Milano, Italy;2. Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy;3. IRCNPC, School of Physics and Nuclear Energy Engineering, Beihang University, Beijing 100191, China;4. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan;5. Center for Nuclear Study, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan;6. Department of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan;7. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA;8. Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium;9. School of Computing, Engineering and Mathematics, University of Brighton, Brighton, United Kingdom;10. Department of Physics, Osaka University, Osaka 560-0043, Toyonaka, Japan;11. Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom;12. Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom;13. Department of Physics, Tohoku University, Miyagi 980-8578, Japan;14. Department of Physics, University of Oslo, N-0316 Oslo, Norway;15. Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy;p. IPNO Orsay, 91400 Orsay, France;q. MTA Atomki, H-4001 Debrecen, Hungary;r. GSI, Planckstrasse 1, D-64291 Darmstadt, Germany;s. Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, I-50019 Firenze, Italy;t. Dipartimento di Fisica, Università degli Studi di Padova, I-35131 Padova, Italy;u. Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova, Italy;v. Advanced Science Research Center, JAEA, Tokai, Ibaraki 319-1195, Japan;w. Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain;x. Departamento de Física teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain;y. Department of Physics, Istanbul University, 34134 Istanbul, Turkey |
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| Abstract: | Extensive and complete nuclear level schemes and neutron resonance densities of 75 nuclides have been used to determine parameters of level density formulae, the spacing distribution of levels with equal spins and parities, and spacing correlations. The dependences of the level density parameters on A, on pairing energies and on shell effects are discussed. The spacing distribution is found to lie between a Poisson and Wigner distribution indicating a transitional character between regular and chaotic properties of the nuclear quantum system near the ground state. |
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