Angular distributions of the ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$ ions from (${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$) reactions on the target nuclei ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$ and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$ have been measured at an energy of 20 MeV (lab). The products of the spectroscopic factors of ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ and several states of the residual nuclei ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$ and ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ca}$ were extracterd from a distorted-wave-Born-approximation analysis. Using the spectroscopic factors of ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$ and ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ca}$ levels, known from ($d,p$) reactions, a spectroscopic factor of 0.42 ± 0.04 for ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$ was found.

NUCLEAR REACTIONS ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$(${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$) and ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$(${}_{}{}^9{}_{}{}^{}\mathrm{Be}$, ${}_{}{}^8{}_{}{}^{}\mathrm{Be}$), $E_{\mathrm{lab}}=20\mathrm{}$ MeV; measured $\sigma \left(\theta \right)$ for stripping to levels of ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$ and ${}_{}{}^{41}{}_{}{}^{}\mathrm{Ca}$, finite-range DWBA analysis; deduced spectroscopic factor of ${}_{}{}^9{}_{}{}^{}\mathrm{Be}$.

• Received 25 April 1977

DOI:https://doi.org/10.1103/PhysRevC.16.1448