Skyrme random-phase-approximation description of lowest K-pi=2(gamma)(+) states in axially deformed nuclei

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10333685" target="_blank" >RIV/00216208:11320/16:10333685 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1103/PhysRevC.93.034301" target="_blank" >http://dx.doi.org/10.1103/PhysRevC.93.034301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevC.93.034301" target="_blank" >10.1103/PhysRevC.93.034301</a>

Result language

angličtina

Original language name

Skyrme random-phase-approximation description of lowest K-pi=2(gamma)(+) states in axially deformed nuclei

Original language description

The lowest quadrupole gamma-vibrational K-pi = 2(+) states in axially deformed rare-earth (Nd, Sm, Gd, Dy, Er, Yb, Hf, W) and actinide (U) nuclei are systematically investigated within the separable random-phase-approximation (SRPA) based on the Skyrme functional. The energies E-gamma and reduced transition probabilities B(E2) of 2(gamma)(+) states are calculated with the Skyrme forces SV-bas and SkM*. The energies of two-quasiparticle configurations forming the SRPA basis are corrected by using the pairing blocking effect. This results in a systematic downshift of E-gamma by 0.3-0.5 MeV and thus in a better agreement with the experiment, especially in Sm, Gd, Dy, Hf, and W regions. For other isotopic chains, a noticeable overestimation of E-gamma and too weak collectivity of 2(gamma)(+) states still persist. It is shown that domains of nuclei with low and high 2(gamma)(+) collectivity are related to the structure of the lowest two-quasiparticle states and conservation of the Nilsson selection rules. The description of 2(gamma)(+) states with SV-bas and SkM* is similar in light rare-earth nuclei but deviates in heavier nuclei. However SV-bas much better reproduces the quadrupole deformation and energy of the isoscalar giant quadrupole resonance. The accuracy of SRPA is justified by comparison with exact RPA. The calculations suggest that a further development of the self-consistent calculation schemes is needed for a systematic satisfactory description of the 2(gamma)(+) states.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

PHYSICAL REVIEW C

ISSN

2469-9985

e-ISSN

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Volume of the periodical

93

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

16

Pages from-to

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UT code for WoS article

000371409000002

EID of the result in the Scopus database

2-s2.0-84960540771