On Applicability of the Random Phase Approximation to the Collective Excitation in Spherical Even Nuclei. II : Correction to the So-Called "Two-Phonon" States in Single Closed Shell Nuclei
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概要
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It is the main purpose of this paper to check the concept of the "2-phonon" states through an analysis of the characteristic features of the first order correction to the conventional "2-phonon" states under the RPA. Numerical results for Ni-isotopes (Ni^<60> and Ni^<62>) and for the single j=15/2 shell model show that the concept of the "2-phonon" states based on the RPA is in breakdown, in the sense that the correction is unexpectedly large in the region of the phonon energy which we are interested in. We have also another important physical situation to destroy the concept of the "2-phonon" from the fact that coupling between the "2-phonon" modes and other 2-quasi-particle excitation modes is essential in most actual nuclei.
- 理論物理学刊行会の論文
- 1967-02-25
著者
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YAMAMURA Masatoshi
Department of Pure and Applied Physics, Faculty of Engineering Science, Kansai University
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Tokunaga Akira
Research Institute For Fundamental Physics Kyoto University
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Marumori Toshio
Department Of Physics Science University Of Tokyo
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Marumori Toshio
Department Of Physics Kyoto University
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Marumori Toshio
Department Of Physics Kyoto University : Department Of Physics Kyushu University
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Yamamura Masatoshi
Department Of Physics Kyoto University
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YAMAMURA Masatoshi
Department of Physics, Kyoto University
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