Application of extended random-phase approximation with ground-state correlations to collective excitations of super(16)O

The ground-state correlation effects on the octupole excitation of super(16)O are studied using the extended random phase approximation (ERPA) derived from the time-dependent density-matrix theory. ERPA includes the effects of ground-state correlations through the fractional occupation of single-par...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.529, p.1-5
Main Author: Tohyama, M
Format: Article
Language:English
Subjects:
Approximation
Correlation
Correlation analysis
Density
Excitation
Joining
Mathematical analysis
Occupation
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Summary:The ground-state correlation effects on the octupole excitation of super(16)O are studied using the extended random phase approximation (ERPA) derived from the time-dependent density-matrix theory. ERPA includes the effects of ground-state correlations through the fractional occupation of single-particle states and a correlated two-body density matrix. The coupling to two particle - two hole configurations is also included in ERPA. It is found that the first 3 super(-) state calculated in the random phase approximation (RPA) is shifted upward when the self-energy contributions due to ground-state correlations are included in particle - hole pairs and that the coupling to two particle - two hole states plays a role in shifting the first 3 super(-) state down to the right position.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/529/1/012026