Using the charge exchange facility and second arm spectrometer at TRIUMF, we have measured the 31 P(n, p) double differential cross section for 198 MeV incident neutrons, at scattering angles of 0 -30°, and excitation energies up to 30 MeV. Via a multipole decomposition analysis we have extracted both the GamowTeller strength distribution and the GT transition probabilities to low-lying 31 Si bound states. Comparison to a shell model calculation, using the full 1s-0d space and universal SD interaction, shows reasonable agreement in the strength distribution, but reduced summed strength in the experiment ( ͚B GT ϭ2.32Ϯ0.20 for E x р10 MeV) relative to the theory (͚B GT ϭ3.33 for E x р10 MeV). We discuss the role of configuration mixing and Pauli blocking on the 31 P→ 31 Si GT strength distribution. ͓S0556-2813͑99͒06602-9͔
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