Low-energy nucleon scattering and Halderson's effective NN interaction

The experimental data of C-12(p, p')(p, n) in the low-energy region (less t han or equal to 80 MeV) were analysed using M3Y effective interaction and H alderson's effective interaction in the theoretical frame of distorted wave Born approximation. By comparing the calculation results of the two effect ive interactions, it was observed that the isovector spin-dependent central part V-sigma tau and the isovector tenser-exchange part V-tau E(T) of Hald erson's effective interaction are appropriate for describing the experiment al data. This analysis also suggests that the isoscalar tensor-exchange par t V-OE(T) of Halderson's effective interaction should be substantially redu ced to obtain agreement with the experimental ratio of cross sections C-12( p, p') C-12 [d sigma/d Omega(1(+), T = 0)]/[d sigma/d Omega(1(+), T = 1)] a t zero degree, and this reduction did not change the good agreement with ex perimental data for excitation of the (1(+), T = 1) state.