decay of the state in and isospin symmetry breaking in the triplet
- Univ. of Connecticut, Storrs, CT (United States)
- Univ. of Massachusetts, Lowell, MA (United States)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Louisiana State Univ., Baton Rouge, LA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The rate of the T = 1, 2(+) to T = 1, 0(+) transition in B-10 (T = 1, T-z = 0) is compared to the analog transitions in Be-10 (T = 1, T-z = -1) and C-10 (T = 1, T-z = +1) to provide constraints on ab initio calculations using realistic nuclear forces. The relevant state in B-10, at E-x = 5.164 MeV, is particle unbound. Therefore, a determination of the B(E2) electromagnetic transition rate requires a precise and accurate determination of the width of the state, as well as the alpha-particle and gamma-ray branching ratios. Previous measurements of the a-particle branching ratio are just barely in agreement. We report on a new study of the alpha-particle branch by studying the B-10(p, p') B-10* reaction in inverse kinematics with the HELIOS spectrometer. The alpha-particle branching ratio that we observe, 0.144 +/- 0.027, is in good agreement with the evaluated value and improves the associated uncertainty. The resulting experimental B(E2) value is 7.0 +/- 2.2 e(2)fm(4) and is more consistent with a flat trend across the A = 10 triplet than previously reported. This is inconsistent with Green's functionMonte Carlo predictions using realistic three-nucleon Hamiltonians, which overpredict the B(E2) value in C-10 and B-10.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- SC0012704; SC0014552; AC02-98CH10946; AC02-06CH11357
- OSTI ID:
- 1411143
- Alternate ID(s):
- OSTI ID: 1396310; OSTI ID: 1425216
- Report Number(s):
- BNL-114283-2017-JA; PRVCAN; TRN: US1800181
- Journal Information:
- Physical Review C, Vol. 96, Issue 4; ISSN 2469-9985
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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