Isospin symmetry in B(E2) values: Coulomb excitation study of 21Mg
(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)
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- author
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review C: covering nuclear physics
- article number
- 051301(R)
- 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
- 2022-04-25 23:17:48
@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.}}, 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}}, doi = {{10.1103/PhysRevC.99.051301}}, year = {{2019}}, }