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Journal
2010 | 8 | 6 | 961-969
Article title

Electric dipole strength distribution below the E1 giant resonance in N = 82 nuclei

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EN
Abstracts
EN
In this study quasiparticle random-phase approximation with the translational invariant Hamiltonian using deformed mean field potential has been conducted to describe electric dipole excitations in 136Xe, 138Ba, 140Ce, 142Nd, 144Sm and 146Gd isotones. The distribution of the calculated E1 strength shows a resonance like structure at energies between 6–8 MeV exhausting up to 1% of the isovector electric dipole Energy Weighted Sum Rule and in some aspects nicely confirms the experimental data. It has been shown that the main part of E1 strength, observed below the threshold in these nuclei may be interpreted as main fragments of the Pygmy Dipole resonance. The agreement between calculated mean excitation energies as well as summed B(E1) value of the 1− excitations and the available experimental data is quite good. The calculations indicate the presence of a few prominent positive parity 1+ States in heavy N = 82 isotones in the energy interval 6–8 MeV which shows not all dipole excitations were of electric character in this energy range.
Publisher

Journal
Year
Volume
8
Issue
6
Pages
961-969
Physical description
Dates
published
1 - 12 - 2010
online
5 - 9 - 2010
Contributors
author
  • Institute of Physics, Academy of Sciences, H. Cavid Avenue 33, Baku, Azerbaijan
author
  • Departments of Physics, Faculty of Science and Art, Sakarya University, Sakarya, Turkey
author
  • Departments of Mathematics, Faculty of Science and Art, Sakarya University, Sakarya, Turkey
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11534-010-0021-0
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