Instantaneous-shape sampling for calculation of the electromagnetic dipole strength in transitional nuclei (CROSBI ID 159522)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Zhang, S.Q. ; Bentley, I. ; Brant, Slobodan ; Donau, F. ; Frauendorf, S. ; Kampfer, B. ; Schwengner, R. ; Wagner, A.
engleski
Instantaneous-shape sampling for calculation of the electromagnetic dipole strength in transitional nuclei
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.
PACS: 21.60.Fw; 21.60.Jz; 23.20.Lv; 25.20.Dc; 27.60.+j
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Podaci o izdanju
80 (2)
2009.
021307(R)-1-021307(R)-5
objavljeno
0556-2813
10.1103/PhysRevC.80.021307