Authors
Schmitt, J.; King, G. B. ; Zegers, R. G.; Ayyad, Y.; Bazin, D.; Brown, B. A.; Carls, A. ; Chen, J.; Davis, A; DeNudt, M.; Wiringa, R.
Abstract
Tracking the evolution of nuclear properties away from stability serves as a valuable test for nuclearmodels. In the present work, the (p,n) charge-exchange reaction was used to test the extraction of Gamow-Teller transition strengths, B(GT), from proton-rich unstable isotopes, and the resulting B(GT) values were compared to shell-model and ab-initio calculations. The 11C(p,n)11N reaction was measured in inverse kinematics at 95 MeV/u at the National Superconducting Cyclotron Lab- oratory (NSCL). The B(GT) values to the 1 state at 0.73 MeV and the 3 state at 2.86 MeV2 2in 11N were determined to be 0.18(1)stat(3)sys and 0.18(1)stat(4)sys, respectively. These results are consistent with shell-model calculations using the wbp interaction after introducing a phenomenolog- ical quenching factor and with ab-initio Variational Monte Carlo calculations using the NV2+3 Ia* NN and 3N interactions without any scaling. Additionally, this result is consistent with the B(GT) values extracted from mirror 11B(n,p) and 11B(t,3He) reactions. This experiment demonstrates the feasibility of using the (p,n) probe in inverse kinematics to extract B(GT) from proton-rich nuclei,although improved background suppression will be important in future experiments.