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DOI 10.1103/PhysRevC.65.021303
Title Oblate stability of A{approx_equal}110 nuclei near the r-process path
Creator/Author Xu, F.R. [Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom) ; Department of Technical Physics, Peking University, Beijing 100871 (China)] ; Walker, P.M. [Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)] ; Wyss, R. [Department of Physics, Royal Institute of Technology, Frescativaegen 24, S-104 05 Stockholm (Sweden)]
Publication Date2002 Feb 01
OSTI IdentifierOSTI ID: 20425359
Other Number(s)Journal ID: ISSN 0556-2813; PRVCAN; TRN: US03A8403008764
Resource TypeJournal Article
Resource RelationJournal: Physical Review. C, Nuclear Physics; Journal Volume: 65; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.65.021303; (c) 2002 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); PBD: Feb 2002
Subject73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ATOMIC NUMBER; COLLECTIVE MODEL; DEFORMED NUCLEI; FERMI LEVEL; GROUND STATES; INTERMEDIATE MASS NUCLEI; ISOMERIC NUCLEI; QUASI PARTICLES; R PROCESS; ROTATIONAL STATES; SHELL MODELS
Description/Abstract Even-even A{approx_equal}110 nuclei approaching the astrophysical r-process path have been investigated using both the cranked and the configuration-constrained shell models. The calculations show that, with increasing neutron number in the Z{>=}40 nuclides, nuclear shapes evolve from prolate, through triaxial to oblate deformations. In contrast to other regions of the nuclear chart, pronounced oblate shapes dominate the collective rotation from ground states to very high spins (I{approx}40), when N{>=}70. The stability of the oblate shapes is due to the simultaneous upper-shell neutron and proton Fermi surfaces, reinforced by the rotation alignment behavior of both nucleon types. Configuration-constrained calculations predict the coexistence of well-deformed prolate and oblate multiquasiparticle (isomeric) states.
Country of PublicationUnited States
LanguageEnglish
FormatSize: page(s) 021303-021303.5
System Entry Date2004 Jul 13

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