Radiative strength function and the pygmy dipole resonance in 208Pb and 70Ni

被引：4

作者：

Achakovskiy, O. I. ^{[1
]}

Kamerdzhiev, S. P. ^{[2
]}

Tselyaev, V. I. ^{[3
]}

机构：

[1] Leipunsky Inst Phys & Power Engn, Natl Res Ctr, Obninsk 249033, Kaluga Region, Russia

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

[3] St Petersburg State Univ, St Petersburg 199034, Russia

来源：

JETP LETTERS | 2016年 / 104卷 / 06期

基金：

俄罗斯科学基金会;

关键词：

NUCLEI;

D O I：

10.1134/S0021364016180053

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pygmy-resonance parameters and the E1 strength function are derived for Pb-208 using a fully self-consistent microscopic formalism recently developed for magic nuclei, which takes into account quasiparticle phonon interactions (or coupling to phonons) in addition to the random phase approximation. For the radiative strength function of Pb-208 at energies above 5 MeV, the experimental data of the Oslo group are adequately described by our predictions, whereby the important role of coupling to phonons is confirmed. By comparing the measurements based on the (He-3, He-3'gamma) and (gamma, gamma') reactions, we discuss the physical properties of the radiative strength function measured for Pb-208. For the neutron-rich Ni-70 nucleus, predictions for the radiative strength function and the pygmy resonance are obtained using a partially self-consistent approach, which invokes the Skyrme forces in deriving the mean field, effective nucleon-nucleon interaction, and phonon characteristics.

引用

页码：374 / 379

页数：6

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[1] Radiative strength function and the pygmy dipole resonance in 208Pb and 70Ni
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