Alpha-clustering systematics from the quasifree (p,pα) knockout reaction

Abstract

Cross sections for the ($p,p\alpha$) reaction at 101.5 MeV have been measured for nine nuclei ranging from ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ to ${}_{}{}^{66}{}_{}{}^{}\mathrm{Zn}$. Distorted-wave impulse approximation analyses of the ground state transitions provide relative alpha-cluster spectroscopic factors in qualitative agreement with (${}_{}{}^6{}_{}{}^{}\mathrm{Li},d$) studies, although quantitative differences exist. The calculations are sensitive to the bound alpha-cluster parametrization, so that the experimental data suggest limits on the rms radius of the cluster-core wave function.