Five form factor values for the 0.478 MeV transition in ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ have been measured at $\theta =180\mathrm{}°$ in the momentum-transfer range, $0.4<q<\mathrm{}0.75\mathrm{}$ ${\mathrm{fm}}^{-1\mathrm{}}$, using a ${\mathrm{Li}}_2$S target. These data will complement measurements recently taken on this transition at $q>\mathrm{}0.8\mathrm{}$ ${\mathrm{fm}}^{-1\mathrm{}}$ by other investigators. Comparison is made with theoretical calculations. A value of the ground-state transition width ${\Gamma }_0\mathrm{}\left(M1\mathrm{}\right)=(7.5\mathrm{}\pm 1.7)\times {10}^{-3\mathrm{}}$ eV is found for this transition in agreement with earlier measurements of other workers.

NUCLEAR REACTIONS ${}_{}{}^7{}_{}{}^{}\mathrm{Li}$ ($e, e^{\prime }$), $E_0=40-74\mathrm{}$ MeV; measured $\frac{d\sigma }{d\Omega }$ at $\theta =180\mathrm{}°$; deduced form factors and transition width ${\Gamma }_0$.

• Received 12 April 1982

DOI:https://doi.org/10.1103/PhysRevC.26.713