S. Lafrance

Structure of 74Ge from the 72Ge(t, p) reaction☆

Abstract The reaction 72Ge(t, p)74Ge has been investigated with a 15 MeV triton beam. Fifty energy levels of 74Ge were identified up to about 4.9 MeV excitation, eighteen of which were previously unreported. Angular distributions were measured and compared with DWBA calculations. Two low-lying states at 1.913 and 2.164 MeV have been assigned as Jπ = 0+, corresponding to the 03+ and 04+ states in 74Ge. The 42+ state has been located at 2.674 MeV, and the 24+ at 2.836 MeV. Many additional spin and parity assignments have been made. The 74Ge nucleus shows a considerably different structure of 0+ states compared with the neighboring 76Ge and 78Ge nuclei, perhaps further evidence for the shape transition suggested recently for the Ge isotopes.

4p and 6p-2h states in 20O

The 18O(t,p) reaction has been used to locate 0+ and 2+6p-2h levels at 4456 and 5304 keV, respectively, in 20O. Excitation energies and (t,p) strengths are in good agreement with this identification. Results for all other levels observed below 5.4 MeV excitation are well accounted for in an (sd)4 model.