Instantaneous-shape sampling for calculation of the electromagnetic dipole strength in transitional nuclei

Zhang, S. Q. and Bentley, I. and Brant, Slobodan and Donau, F. and Frauendorf, S. and Kampfer, B. and Schwengner, R. and Wagner, A. (2009) Instantaneous-shape sampling for calculation of the electromagnetic dipole strength in transitional nuclei. Physical Review C, 80 (2). pp. 21307-5. ISSN 0556-2813

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Abstract

Electromagnetic dipole absorption cross sections of transitional nuclei with large-amplitude shape fluctuations are calculated in a microscopic way by introducing the concept of instantaneous-shape sampling, which is based on slow shape dynamics as compared with fast dipole vibrations. The dipole strength is calculated by means of the quasiparticle random-phase approximation (QRPA) for the instantaneous shapes, the probability of which is obtained by means of the interacting boson approximation. The calculations agree well with the experimental photoabsorption cross sections near the nucleon emission threshold, but they underestimate it at low energies. The cumulative cross sections for the region below the threshold are a factor of 2 too low.

Item Type: Article
Date: August 2009
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2009) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1010
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 30 May 2014 16:25
Last Modified: 30 May 2014 16:25
URI: http://digre.pmf.unizg.hr/id/eprint/2028

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