Signature Scheme of the Shell Model and Nuclear Collective Excitations

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概要

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• The symmetries between the proton and neutron systems in a nucleus are described in terms of the signatures. Three kinds of signatures (i.e., the pn-, pn^^- and pp^^- (or nn^^・) signatures)are introduced and they are related to the appearance of various collective motions such as rotations or vibrations. It is shown that the pn-signature scheme provides a band-like structure of deformed nuclei, while the features associated with the quadrupole vibration are obtained in the pn^^- and pp^^-signature scheme. From the detailed investigation of the pn^^-symmetric wave functions, it is concluded that the regularities provided by the present shell model are more analogous to those of the γ-unstable surface vibration model (Wilets-Jean model) rather than to those of harmonic phonon model.

• 理論物理学刊行会の論文
• 1981-02-25

著者

• OGAWA Kaku

  Department of Physics, Kyoto University

• Ogawa Kengo

  Institute For Nuclear Study University Of Tokyo

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