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Title: α decay of the T = 1 ,   2 + state in B 10 and isospin symmetry breaking in the A = 10 triplet

Abstract

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)more » value in C-10 and B-10.« less

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1462497
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Kuvin, S. A., Wuosmaa, A. H., Lister, C. J., Avila, M. L., Hoffman, C. R., Kay, B. P., McNeel, D. G., Morse, C., McCutchan, E. A., Santiago-Gonzalez, D., and Winkelbauer, J. R. α decay of the T=1, 2+ state in B10 and isospin symmetry breaking in the A=10 triplet. United States: N. p., 2017. Web. doi:10.1103/physrevc.96.041301.
Kuvin, S. A., Wuosmaa, A. H., Lister, C. J., Avila, M. L., Hoffman, C. R., Kay, B. P., McNeel, D. G., Morse, C., McCutchan, E. A., Santiago-Gonzalez, D., & Winkelbauer, J. R. α decay of the T=1, 2+ state in B10 and isospin symmetry breaking in the A=10 triplet. United States. doi:10.1103/physrevc.96.041301.
Kuvin, S. A., Wuosmaa, A. H., Lister, C. J., Avila, M. L., Hoffman, C. R., Kay, B. P., McNeel, D. G., Morse, C., McCutchan, E. A., Santiago-Gonzalez, D., and Winkelbauer, J. R. Sun . "α decay of the T=1, 2+ state in B10 and isospin symmetry breaking in the A=10 triplet". United States. doi:10.1103/physrevc.96.041301.
@article{osti_1462497,
title = {α decay of the T=1, 2+ state in B10 and isospin symmetry breaking in the A=10 triplet},
author = {Kuvin, S. A. and Wuosmaa, A. H. and Lister, C. J. and Avila, M. L. and Hoffman, C. R. and Kay, B. P. and McNeel, D. G. and Morse, C. and McCutchan, E. A. and Santiago-Gonzalez, D. and Winkelbauer, J. R.},
abstractNote = {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.},
doi = {10.1103/physrevc.96.041301},
journal = {Physical Review C},
issn = {2469-9985},
number = 4,
volume = 96,
place = {United States},
year = {2017},
month = {10}
}

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