Isospin breaking in the reactionsH3+Be9→Li6+He6,Li*6+He6

Abstract

In the reactions ${}_{}{}^9{}_{}{}^{}\mathrm{Be}(t,{}_{}{}^6{}_{}{}^{}\mathrm{Li}){}_{}{}^6{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^9{}_{}{}^{}\mathrm{Be}(t,{}_{}{}^6{}_{}{}^{}\mathrm{Li}_{}^{*}{}_{}{}^{}\mathrm{}(3.56\left)\mathrm{}\right){}_{}{}^6{}_{}{}^{}\mathrm{He}$ significant deviations of the cross sections from symmetry around 90° are seen in the isospin multiplet channel. One may interpret this deviation as arising from the difference between ${}_{}{}^6{}_{}{}^{}\mathrm{He}$ and ${}_{}{}^6{}_{}{}^{}\mathrm{Li}_{}^{*}{}_{}{}^{}$ radial wave functions and not from a higher mixture of isospin states. This interpretation is supported by a recent muon-capture analysis.