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.

[NUCLEAR REACTIONS ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$(${}_{}{}^3{}_{}{}^{}\mathrm{H}$, ${}_{}{}^6{}_{}{}^{}\mathrm{He}$)${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$(${}_{}{}^3{}_{}{}^{}\mathrm{H}$, ${}_{}{}^6{}_{}{}^{}\mathrm{He}$)${}_{}{}^6{}_{}{}^{}\mathrm{Li}$, failure of experimental symmetry around 90° explained by radial functions difference. Implications for muon capture ${}_{}{}^6{}_{}{}^{}\mathrm{He}$ calculated.]

• Received 15 October 1973

DOI:https://doi.org/10.1103/PhysRevC.9.782