Metallic targets of enriched ${\mathrm{Li}}^5$ and ${\mathrm{Li}}^7$ were bombarded with 14.8-Mev deuterons. The outgoing particles were magnetically analyzed and detected in nuclear emulsions or scintillation counters. Angular distributions for the following reactions were measured: ${\mathrm{Li}}^6(d, p){\mathrm{Li}}^{7*}$ 4.6 and 7.46 Mev. ${\mathrm{Li}}^7(d, p){\mathrm{Li}}^{8*}$ 2.28 Mev, ${\mathrm{Li}}^7(d, t){\mathrm{Li}}^{6*}$ 3.57 Mev, ${\mathrm{Li}}^6(d, d^{\prime }){\mathrm{Li}}^{6*}$ 2.19 Mev, ${\mathrm{Li}}^6(d, \alpha ){\mathrm{He}}^4$ ground state, ${\mathrm{Li}}^6(d, t){\mathrm{Li}}^5$ and ${\mathrm{Li}}^6(d, {\mathrm{He}}^3){\mathrm{He}}^5$. A search was made for other levels produced in these reactions and in the ${\mathrm{Li}}^7(d, d^{\prime }){\mathrm{Li}}^{7*}$ reaction. No new levels were observed; upper limits on the cross sections of unobserved levels are given. The results of the ($d, p$), ($d, t$), and ($d$, ${\mathrm{He}}^3$) reactions were compared with stripping theory and with the predictions of the shell model. The agreement is, in general, satisfactory.

The ${\mathrm{Li}}^6(d, t)$ and ${\mathrm{Li}}^6(d, {\mathrm{He}}^3)$ reactions produce a continuous spectrum of outgoing particles at each angle. The angular distribution of the tritons (or ${\mathrm{He}}^3$ particles) is strongly peaked forward and can be fitted with Butler curves having $l=1\mathrm{}$, $r_0=6\mathrm{}\mathrm{f}$. The spectra at small angles show a peak corresponding to the ${\mathrm{Li}}^5$ (or ${\mathrm{He}}^5$) ground state, but at large angles the peak disappears and the spectra are constant. The shape of the spectra can be explained by the Butler formula if the energy dependence of the reduced width is taken into account. The form of this dependence was deduced from the results of the nucleon-helium elastic scattering experiments.

• Received 25 August 1959

DOI:https://doi.org/10.1103/PhysRev.117.781