Study of Energy Levels ofSi29

The ${}_{}{}^{30}{}_{}{}^{}\mathrm{Si}({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha ){}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$ reaction was studied by use of the 12-MeV ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ beam of the Argonne EN Tandem Van de Graaff and a broad-range magnetic spectrograph. Energy levels of ${}_{}{}^{29}{}_{}{}^{}\mathrm{Si}$ up to about 10-MeV excitation were observed, and spectra at 10 angles were taken. Relative spectroscopic factors were extracted with the aid of distorted-wave calculations. The results were compared with previous neutron-pickup reactions on ${}_{}{}^{30}{}_{}{}^{}\mathrm{Si}$ and with theoretical predictions which were calculated within the framework of the rotational model.