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Pygmy dipole resonance in exotic nuclei

✍ Scribed by N. Tsoneva; H. Lenske

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
467 KB
Volume
59
Category
Article
ISSN
0146-6410

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✦ Synopsis

The evolution of the PDR strength with the neutron excess is investigated in Sn isotopic and N = 82 isotonic chains with regard to its possible connection with the neutron skin thickness. For this purpose a recently proposed method incorporating both HFB and multi-phonon QPM theory is applied. Analysis of the corresponding neutron and proton dipole transition densities is presented.

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We study the statistical properties of the electric pygmy dipole resonance in four different isotones with neutron number N = 82. These nuclei are 138 56 Ba, 140 58 Ce, 142 60 Nd, 144 62 Sm. The data set comprises 184 levels with spin and parity J Ο€ = 1 -and their ground state B(E1) transition stren