Study of theB10(O16,α)Na22reaction

Abstract

States in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Na}$ were populated using the ${}_{}{}^{10}{}_{}{}^{}\mathrm{B}({}_{}{}^{16}{}_{}{}^{}\mathrm{O},\alpha )$ reaction. Excitation functions were measured in the energy range $E_{\mathrm{c}.\mathrm{m}.\mathrm{}}=15.4-17.7\mathrm{}$ MeV for 47 excited states in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Na}$ from 0 to 14 MeV excitation. Angular distributions were measured at a bombarding energy of 46 MeV for a number of the excited states and were observed to be symmetrical around 90° (c.m.). Fluctuation analyses of the excitation functions were made, and the results indicated a statistical compound-nucleus process for the reaction mechanism. Hauser-Feshbach calculations gave good agreement with the data and provided strong evidence for proposed high-spin members of the ground-state rotational band, and the $K=0^{+}$, $T=0\mathrm{}$ band in ${}_{}{}^{22}{}_{}{}^{}\mathrm{Na}$.