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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

Journal Article · · Physical Review C
 [1];  [1];  [2];  [3];  [3];  [3];  [1];  [2];  [4];  [5];  [6]
  1. Univ. of Connecticut, Storrs, CT (United States)
  2. Univ. of Massachusetts, Lowell, MA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Louisiana State Univ., Baton Rouge, LA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  6. 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
Citation Metrics:
Cited by: 2 works
Citation information provided by
Web of Science

References (21)

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Precise γ -ray intensity measurements in 10 B journal November 2012
Ab initio shell model for A = 10 nuclei journal August 2002
Commissioning of the HELIOS spectrometer
  • Lighthall, J. C.; Back, B. B.; Baker, S. I.
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journal October 2010
Quantum Monte Carlo calculations of A = 9 , 10 nuclei journal October 2002
Opposite deformations between protons and neutrons in proton-rich C isotopes journal June 1997
Lifetime of the 2 1 + state in 10 C journal July 2012
Lattice Effective Field Theory Calculations for A = 3 , 4, 6, 12 Nuclei journal April 2010
Absolute resonance strengths in the $^{6,7}Li(\alpha, \gamma)^{10,11}B$ reactions journal August 2004
Precise Electromagnetic Tests of Ab Initio Calculations of Light Nuclei: States in Be 10 journal November 2009
Ab initio coupled-cluster approach to nuclear structure with modern nucleon-nucleon interactions journal September 2010
Quantum Monte Carlo methods for nuclear physics journal September 2015
The 5.11 and 5.16 MeV levels of B10 journal August 1963
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Gamma Rays from B 10 + p ; Decay Schemes and Excitation Functions journal May 1966
A solenoidal spectrometer for reactions in inverse kinematics
  • Wuosmaa, A. H.; Schiffer, J. P.; Back, B. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 580, Issue 3 https://doi.org/10.1016/j.nima.2007.07.029
journal October 2007
Stretched states in B 12 , 13 with the ( d , α ) reaction journal December 2014
Structure of C 14 and B 14 from the C 14 , 15 ( d , He 3 ) B 13 , 14 reactions journal April 2016

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