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Evolution of collectivity and evidence of octupole correlations in Br 73

Bhattacharya, S. ; Trivedi, T. ; Negi, D. ; Singh, R. P. ; Muralithar, S. ; Palit, R. ; Ragnarsson, I. LU ; Nag, S. ; Rajbanshi, S. and Raju, M. Kumar , et al. (2019) In Physical Review C 100(1).
Abstract

High-spin states in the Br73 nucleus have been populated via the Cr50(Si28,αp)Br73 fusion evaporation reaction with a beam energy of 90 MeV. The deexciting gamma rays were detected using the Indian National Gamma Array (INGA). Using the γ-γ coincidence technique, two new bands and eight new interconnecting transitions have been added. The strong interconnecting E1 transitions, between positive and negative parity bands, ensure the existence of octupole correlations at low spin. Line shapes have been observed for 17 transitions, which were analyzed by the Doppler-shift attenuation method to determine the lifetime of excited states of the yrast negative parity band and its signature partner band along with the positive parity band. The... (More)

High-spin states in the Br73 nucleus have been populated via the Cr50(Si28,αp)Br73 fusion evaporation reaction with a beam energy of 90 MeV. The deexciting gamma rays were detected using the Indian National Gamma Array (INGA). Using the γ-γ coincidence technique, two new bands and eight new interconnecting transitions have been added. The strong interconnecting E1 transitions, between positive and negative parity bands, ensure the existence of octupole correlations at low spin. Line shapes have been observed for 17 transitions, which were analyzed by the Doppler-shift attenuation method to determine the lifetime of excited states of the yrast negative parity band and its signature partner band along with the positive parity band. The deduced transitional quadrupole moments Qt for the ground state band decrease with increasing spin, with their values ranging from 2.88 to 1.00 eb. A similar trend in the quadrupole moment has also been observed for the signature partner as well as for the positive parity band. This decrease in Qt with increasing spin for these bands is interpreted in terms of the cranked Nilsson-Strutinsky model and total Routhian surface calculations, which indicate possible band termination at higher spin.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
100
issue
1
article number
014315
publisher
American Physical Society
external identifiers
  • scopus:85069936253
ISSN
2469-9985
DOI
10.1103/PhysRevC.100.014315
language
English
LU publication?
yes
id
e7e3c693-f21d-4212-b04c-6d6913f50248
date added to LUP
2019-08-29 14:54:36
date last changed
2022-04-26 05:11:41
@article{e7e3c693-f21d-4212-b04c-6d6913f50248,
  abstract     = {{<p>High-spin states in the Br73 nucleus have been populated via the Cr50(Si28,αp)Br73 fusion evaporation reaction with a beam energy of 90 MeV. The deexciting gamma rays were detected using the Indian National Gamma Array (INGA). Using the γ-γ coincidence technique, two new bands and eight new interconnecting transitions have been added. The strong interconnecting E1 transitions, between positive and negative parity bands, ensure the existence of octupole correlations at low spin. Line shapes have been observed for 17 transitions, which were analyzed by the Doppler-shift attenuation method to determine the lifetime of excited states of the yrast negative parity band and its signature partner band along with the positive parity band. The deduced transitional quadrupole moments Qt for the ground state band decrease with increasing spin, with their values ranging from 2.88 to 1.00 eb. A similar trend in the quadrupole moment has also been observed for the signature partner as well as for the positive parity band. This decrease in Qt with increasing spin for these bands is interpreted in terms of the cranked Nilsson-Strutinsky model and total Routhian surface calculations, which indicate possible band termination at higher spin.</p>}},
  author       = {{Bhattacharya, S. and Trivedi, T. and Negi, D. and Singh, R. P. and Muralithar, S. and Palit, R. and Ragnarsson, I. and Nag, S. and Rajbanshi, S. and Raju, M. Kumar and Parkar, V. V. and Mohanto, G. and Kumar, S. and Choudhury, D. and Kumar, R. and Bhowmik, R. K. and Pancholi, S. C. and Jain, A. K.}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{1}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Evolution of collectivity and evidence of octupole correlations in Br 73}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.100.014315}},
  doi          = {{10.1103/PhysRevC.100.014315}},
  volume       = {{100}},
  year         = {{2019}},
}