Universität zu Köln

Jolos, R. V. and von Brentano, P. (2015). Stabilization of octupole deformation with angular-momentum increase in the alternating-parity bands. Phys. Rev. C, 92 (4). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1089-490X

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Abstract

Background: Low-lying octupole collective excitations play an important role in describing the structure of nuclei in different regions of the nuclide chart. Ground state alternating-parity rotational bands combining both positive-and negative-parity states are known in several nuclei. The experimental data indicate that octupole deformation becomes stable with increase of the angular momentum. Purpose: We introduce a nondimensional characteristic of the spectra of the ground state alternating-parity bands and apply it to investigation of a stabilization of the octupole deformation with increase of the angular momentum. Method: We analyze the experimental data on the energies of the states belonging to the alternating-parity bands based on the ratio of the interpolated and the experimental energies of the negative-parity states. Interpolated energies are determined by the experimental energies of the neighboring positive-parity states assuming smooth dependence on the angular momentum. Results: The values of the ratio of the interpolated and the experimental energies of the negative-parity states belonging to the ground state alternating-parity bands of Ba-144,Ba-146 and some rare-earth and actinide nuclei are evaluated. Conclusion: It is shown that the angular-momentum dependence of the ratio of the interpolated and the experimental energies of the negative-parity states belonging to the ground state alternating-parity bands of Ba-144,Ba-146 and some rare-earth and actinide nuclei indicates stabilization of the octupole deformation with angular-momentum increase.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Jolos, R. V. UNSPECIFIED UNSPECIFIED UNSPECIFIED von Brentano, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-389548
DOI:	10.1103/PhysRevC.92.044318
Journal or Publication Title:	Phys. Rev. C
Volume:	92
Number:	4
Date:	2015
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1089-490X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NUCLEI Multiple languages Physics, Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38954