Precise gamma-ray intensity measurements in B-10

Precise electromagnetic transition matrix elements in Be-10 and C-10 have provided surprisingly stringent tests of modern ab initio calculations using realistic nuclear forces. The analog transition in B-10 can further constrain these new calculations and probe the symmetry of the wave functions across the A = 10 multiplet. We report on a careful measurement of the gamma-ray intensities from states populated in the B-10(p, p') reaction at 10 MeV, including a determination of the key E2 branch from the J = 2 T = 1 state at 5164 keV to the J = 0 T = 1 state at 1740 keV of 0.16(4)%.