On vibrational states in deformed odd-A nuclei

Soloviev, V.G.; Nesterenko, V. O.; Баструков, С. И.

doi:10.1007/bf01413839

Cited by 21 publications

(9 citation statements)

References 28 publications

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“…This in turn may be very important, especially for the description of/?-and 7-vibrational transition probabilities. A similar effect has been well demonstrated in numerous calculations of these probabilities within the quasiparticle plus phonon model (QPM) for odd-A deformed nuclei [24][25][26][27]. The importance of vibrational admixtures in low-lying states of odd-odd nuclei has also been predicted in some phenomenological models [15,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 77%

“…After the Valatin-Bogoliubov transformation from single-particle operators, a0 + , to the quasiparticle operators, c~, and using the RPA equations for one-phonon excitation of the even-even core, the intrinsic hamiltonian of (6) can be written in the form [26,33] …”

Section: Intrinsic Hamiltonian and Neutron-proton Interactionmentioning

confidence: 99%

“…The functions X~, J~ and Fq~q~ involved in (15) are derived in the QPM for the case in which isoscalar and isovector forces are taken into account. The quantity Fq ~, q~ is defined as follows (see also [26] …”

Section: Appendix Notation Used In the Intrinsic Hamiltonianmentioning

confidence: 99%

“…Instead the deformed average field was used in the usual Nilsson model form with its standard parametrization [34]. In second quantization language this average field can be expressed in the following form [25,26,35] :…”

Section: Intrinsic Hamiltonian and Neutron-proton Interactionmentioning

confidence: 99%

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Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho

Kvasil

Sheline

Nesterenko

et al. 1992

Z. Physik A - Hadrons and Nuclei

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The microscopic approach for the description of low-lying intrinsic states in deformed odd-odd nuclei is formulated as a generalization of the quasiparticle-phonon model. In comparison with other models used for deformed odd-odd nuclei, the approach proposed in this paper involves vibrational degrees of freedom of the doubly-even core, their coupling to quasiparticle degrees of freedom and the n-p interaction between the odd particles. Our model treats all of these modes of nuclear motion on the same microscopic footing. This proposed model is applied to calculate the energies and phononquasiparticle structure of the intrinsic states of the oddodd Ho isotopes with A = 160, 162, 164, 166 and 168. It is found that the low-lying intrinsic states in the odd-odd Ho isotopes have only small vibrational components. In general the vibrational states are fragmented over many intrinsic states.

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Section: Introductionmentioning

confidence: 77%

Section: Intrinsic Hamiltonian and Neutron-proton Interactionmentioning

confidence: 99%

Section: Appendix Notation Used In the Intrinsic Hamiltonianmentioning

confidence: 99%

Section: Intrinsic Hamiltonian and Neutron-proton Interactionmentioning

confidence: 99%

See 2 more Smart Citations

Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho

Kvasil

Sheline

Nesterenko

et al. 1992

Z. Physik A - Hadrons and Nuclei

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“…The model takes account of the quasiparticle-phonon interaction, and the wave functions of excited states contain the sums of one-and two-phonon components [8,9]. it is shown that the inclusion of the Pauli principle in the two-phonon components of the wave functions [10] influences essentially the two-phonon collective states in doubly even nuclei [11] and some vibrational states in odd-A nuclei [12]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Description of radiative strength functions in deformed nuclei

1985

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Radiative strength functions of El-and Ml-transitions from ground states of doubly even deformed nuclei to states near the neutron binding energy B, arc calculated within the quasiparticle-phonon nuclear model. The wave functions of excited states include one-and two-phonon components. The calculations were made with the Pauli principle being or not included in the two-phonon components of the wave functions. It is shown that the radiative El-and M 1-strength functions as well as the widths of giant dipole resonances in deformed nuclei are slightly influenced by the two-phonon components of the wave functions and they can be calculated in the RPA. The kE1-and kMl-values are calculated for some deformed nuclei of the rare-earth and actinide region. The calculated values of kE~ are 1.5-2 times larger and the values of k~t ~ are somewhat less than the average values obtained in [14] from the analysis of available experimental data.

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On the role of the coriolis and quasiparticle-phonon interactions in describingE1 transition probabilities in odd Eu and Tb isotopes

Alikov

Badalov

Nesterenko

et al. 1988

Z. Physik A - Atomic Nuclei

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It is shown within the microscopic approach combining the quasiparticle-phonon nuclear model and the nonadiabatic rotational model (QPNM + NRM) that a complicated behaviour of E 1 transitions in nuclei 153, lSSEu and lss, 157Tb can be described only if both the Coriolis and quasiparticle-phonon interactions are taken into account. In contrast with the results obtained in the NRM allowing for pairing and the Coriolis forces only, QPNM +NRM calculations provide a considerable increase in E I(AK=0) transitions whereas E I(IAKI = 1) transitions can undergo either increase or essential decrease. We also describe the low-lying states of the considered nuclei and demonstrate the decisive role of the giant dipole resonance "tail" in E 1 transitions between the low-lying states. The obtained results are analysed in detail.

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On vibrational states in deformed odd-A nuclei

Cited by 21 publications

References 28 publications

Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho

Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho

Description of radiative strength functions in deformed nuclei

On the role of the coriolis and quasiparticle-phonon interactions in describingE1 transition probabilities in odd Eu and Tb isotopes

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