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This article is cited in 9 scientific papers (total in 9 papers)
FIELDS, PARTICLES, AND NUCLEI
Fine structure and collectivity of the levels of the pygmy dipole resonance in $^{208}$Pb in a self-consistent model
N. A. Lyutorovicha, V. I. Tselyaeva, O. I. Achakovskiyb, S. P. Kamerdzhievc a St. Petersburg State University, St. Petersburg, Russia
b National Research Center Leipunsky Institute of Physics and Power Engineering, Obninsk, Kaluga region, Russia
c National Research Center Kurchatov Institute, Moscow, Russia
Abstract:
A novel fully self-consistent microscopic approach based on the energy density functional method is employed to calculate the fine structure of the pygmy dipole resonance in $^{208}$Pb, i.e., the energies and reduced probabilities of $E1$ transitions for the states with energies below $10$ MeV. The approach includes the random-phase approximation, quasiparticle-phonon interaction and the single-particle continuum. The theoretical results are compared to the available high-resolution data and found to agree with measured integral characteristics of the pygmy dipole resonance at energies above $5.7$ MeV. Residual spin-spin forces are quantified, and their contribution is found to be significant at both low and high energies. A recently proposed criterion is employed to analyze the collectivity of the $1^-$states in $^{208}$Pb.
Received: 22.03.2018
Citation:
N. A. Lyutorovich, V. I. Tselyaev, O. I. Achakovskiy, S. P. Kamerdzhiev, “Fine structure and collectivity of the levels of the pygmy dipole resonance in $^{208}$Pb in a self-consistent model”, Pis'ma v Zh. Èksper. Teoret. Fiz., 107:11 (2018), 699–704; JETP Letters, 107:11 (2018), 659–664
Linking options:
https://www.mathnet.ru/eng/jetpl5634 https://www.mathnet.ru/eng/jetpl/v107/i11/p699
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Abstract page: | 163 | Full-text PDF : | 40 | References: | 19 | First page: | 6 |
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