Advanced

Isospin symmetry in B(E2) values: Coulomb excitation study of 21Mg

Ruotsalainen, P.; Henderson, J.; Hackman, G; Sargsyan, G. H.; Launey, K.D.; Saxena, A.; Srivastava, P. C.; Stroberg, S. R.; Grahn, T and Pakarinen, J., et al. (2019) In Physical Review C: covering nuclear physics
Abstract
The Tz=−32 nucleus 21Mg has been studied by Coulomb excitation on 196Pt and 110Pd targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in 21Mg was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in 21Mg. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions... (More)
The Tz=−32 nucleus 21Mg has been studied by Coulomb excitation on 196Pt and 110Pd targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in 21Mg was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in 21Mg. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C: covering nuclear physics
publisher
American Physical Society
external identifiers
  • scopus:85065614139
ISSN
2469-9985
DOI
10.1103/PhysRevC.99.051301
language
English
LU publication?
no
id
cd6af529-5367-406e-b233-a1f5683f3be8
date added to LUP
2019-05-07 14:07:18
date last changed
2019-06-19 04:11:34
@article{cd6af529-5367-406e-b233-a1f5683f3be8,
  abstract     = {The Tz=−32 nucleus 21Mg has been studied by Coulomb excitation on 196Pt and 110Pd targets. A 205.6(1)-keV γ-ray transition resulting from the Coulomb excitation of the 52+ ground state to the first excited 12+ state in 21Mg was observed for the first time. Coulomb excitation cross-section measurements with both targets and a measurement of the half-life of the 12+ state yield an adopted value of B(E2;52+→12+)=13.3(4) W.u. A new excited state at 1672(1) keV with tentative 92+ assignment was also identified in 21Mg. This work demonstrates a large difference in the B(E2;52+→12+) value between T=32, A=21 mirror nuclei. The difference is investigated in the shell-model framework employing both isospin conserving and breaking USD interactions and using modern ab initio nuclear structure calculations, which have recently become applicable in the sd shell.},
  articleno    = {051301(R)},
  author       = {Ruotsalainen, P. and Henderson, J. and Hackman, G and Sargsyan, G. H. and Launey, K.D. and Saxena, A. and Srivastava, P. C. and Stroberg, S. R. and Grahn, T and Pakarinen, J. and Ball, G. C. and Julin, R and Greenlees, P. T. and Smallcombe, J. and Andreoiu, Corina and Bernier, Nikita and Bowry, M. and Buckner, M. and Caballero-Folch, R. and Chester, A. and Cruz, S. and Evitts, L. J. and Frederick, R.  and Garnsworthy, A B and Holl, Matthias and Kurkjian, A. and Kisliuk, D. and Leach, K. G. and Mcgee, E. and Measures, James and Mücher, D and Park, Joochun and Sarazin, F and Smith, J. K. and Southall, D. and Starosta, Krzysztof and Svensson, C. E. and Whitmore, K. and Williams, M. and Wu, C.Y.},
  issn         = {2469-9985},
  language     = {eng},
  publisher    = {American Physical Society},
  series       = {	Physical Review C: covering nuclear physics},
  title        = {Isospin symmetry in B(E2) values: Coulomb excitation study of 21Mg},
  url          = {http://dx.doi.org/10.1103/PhysRevC.99.051301},
  year         = {2019},
}