Study of (He3,t) Reactions at 70 MeV to Isobaric Analog States ofCr50,Ni62, andZr90

Abstract

The analysis of (${}_{}{}^3{}_{}{}^{}\mathrm{He},t$) reactions at 70 MeV to isobaric analog ground states of ${}_{}{}^{50}{}_{}{}^{}\mathrm{Cr}$, ${}_{}{}^{62}{}_{}{}^{}\mathrm{Ni}$, and ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$ have shown an energy dependence in the extracted isospin-dependent interaction strengths consistent with results at lower energies; the interaction strengths are approximately 50% smaller than at lower bombarding energies. The shapes of the form factors in a macroscopic analysis are nuclei-dependent. A mass-three optical potential with a real strength of about 110 MeV and a volume imaginary term is strongly preferred in the (${}_{}{}^3{}_{}{}^{}\mathrm{He},t$) calculations.