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Title: Unexpected 5 / 2 - spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes

Abstract

The 147Ba nucleus has been studied in prompt γ-ray spectroscopy using the EUROGAM2 Ge array. Spin and parity of the ground state has been determined to be 5/2 -. The unexpected, 5/2 - ground state results from interaction with other negative-parity configurations. A new ground-state band has been established in 147Ba and some previously reported levels have been arranged into a 3/2 - band, which may correspond to the 3/2 -[532] configuration. The new spin assignments in 147Ba suggest that the theoretical predictions of static octupole deformation in the ground state of 147Ba may not be be valid. No candidates for parity doublets have been found in 147Ba. Instead, an octupole band built on the ground state has been proposed.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1419855
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 3; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Rząca-Urban, T., Urban, W., Smith, A. G., Ahmad, I., and Syntfeld-Każuch, A. Unexpected 5/2- spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes. United States: N. p., 2013. Web. doi:10.1103/PhysRevC.87.031305.
Rząca-Urban, T., Urban, W., Smith, A. G., Ahmad, I., & Syntfeld-Każuch, A. Unexpected 5/2- spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes. United States. https://doi.org/10.1103/PhysRevC.87.031305
Rząca-Urban, T., Urban, W., Smith, A. G., Ahmad, I., and Syntfeld-Każuch, A. Fri . "Unexpected 5/2- spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes". United States. https://doi.org/10.1103/PhysRevC.87.031305.
@article{osti_1419855,
title = {Unexpected 5/2- spin of the ground state in 147 Ba: No octupole deformation in ground states of odd- A Ba isotopes},
author = {Rząca-Urban, T. and Urban, W. and Smith, A. G. and Ahmad, I. and Syntfeld-Każuch, A.},
abstractNote = {The 147Ba nucleus has been studied in prompt γ-ray spectroscopy using the EUROGAM2 Ge array. Spin and parity of the ground state has been determined to be 5/2-. The unexpected, 5/2- ground state results from interaction with other negative-parity configurations. A new ground-state band has been established in 147Ba and some previously reported levels have been arranged into a 3/2- band, which may correspond to the 3/2-[532] configuration. The new spin assignments in 147Ba suggest that the theoretical predictions of static octupole deformation in the ground state of 147Ba may not be be valid. No candidates for parity doublets have been found in 147Ba. Instead, an octupole band built on the ground state has been proposed.},
doi = {10.1103/PhysRevC.87.031305},
url = {https://www.osti.gov/biblio/1419855}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 3,
volume = 87,
place = {United States},
year = {2013},
month = {3}
}

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