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Isospin mixing and the cubic isobaric multiplet mass equation in the lowest T=2, A=32 quintet

Journal Article · · Physical Review. C
 [1];  [2];  [3];  [4];  [3];  [5];  [6];  [6];  [6];  [7];  [8];  [9];  [10];  [11];  [2];  [2];  [6];  [2];  [10];  [2] more »;  [12];  [5];  [2];  [2];  [13];  [10];  [9] « less
  1. Univ. of the Western Cape, Bellville (South Africa); OSTI
  2. Univ. of the Western Cape, Bellville (South Africa)
  3. Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
  4. Univ. of Washington, Seattle, WA (United States)
  5. Univ. of the Witwatersrand, Johannesburg (South Africa); iThemba LABS, Somerset West (South Africa)
  6. Univ. of Guelph, ON (Canada)
  7. Technische Univ. München, Garching (Germany)
  8. Univ. of the Western Cape, Bellville (South Africa); Univ. of Guelph, ON (Canada)
  9. Ludwig Maximilian Univ. of Munich, Munich (Germany)
  10. iThemba LABS, Somerset West (South Africa)
  11. Colorado School of Mines, Golden, CO (United States)
  12. iThemba LABS, Somerset West (South Africa); Stellenbosch University (South Africa)
  13. University of the West of Scotland, Paisley (United Kingdom)
+ Show Author Affiliations
The isobaric multiplet mass equation (IMME) is known to break down in the first T=2,A=32 isospin quintet. In this work we combine high-resolution experimental data with state-of-the-art shell-model calculations to investigate isospin mixing as a possible cause for this violation. The experimental data are used to validate isospin-mixing matrix elements calculated with newly developed shell-model Hamiltonians. Our analysis shows that isospin mixing with nonanalog T=1 states contributes to the IMME breakdown, making the requirement of an anomalous cubic term inevitable for the multiplet.
Research Organization:
Colorado School of Mines, Golden, CO (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC), National Research Foundation (NRF) South Africa
Grant/Contract Number:
FG02-93ER40789; SC0017649
OSTI ID:
1979847
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 104; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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beta decay
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charge-exchange reactions
models based on symmetries
nuclear forces
nuclear spin & parity
shell model