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Excited levels of 70Ge and proton holes in 69Ga have been investigated by means of the 69Ga (3He, d)70Ge reaction at an incident beam energy of 22.5 MeV. Angular distributions were measured and are compared with the prediction of the distorted-wave-Born-approximation (DWBA) theory in order to obtain the spectroscopic strengths of each level.The number of proton holes in 69Ga was obtained from the sum rule of the spectroscopic strengths. The vacancy probability UJ2 and the center of gravity energy EJ for the 2p3/2, 1f5/2, and 2p1/2 subshells are[Formula: see text]These are compared with the pairing model calculations.

The A2 coefficient of the beta–gamma angular correlation for the cascade 2−(β+)2+(γ)0+ in the positron decay of 74As to 74Ge has been measured as a function of energy. The values found are 0.015 ± 0.006 at W = 1.8, 0.019 ± 0.004 at W = 2.0, 0.030 ± 0.005 at W = 2.1, and 0.025 ± 0.005 at W = 2.2, where the energy W is measured in mc2 units. The data have been used to examine the structure of the first excited level in 74Ge, using the "modified Bij approximation". Four shell-model configurations, as well as a rotational excitation, have been found to fit the experimental data. The validity of the application of the "modified Bij approximation" to this decay is discussed.

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The values of spins, parities, and spectroscopic factors for neutron transfer have been determined for many low-lying states in 97Mo and 101Mo by a study of the (t, d) and (d, p) reactions on the neighbouring even-mass isotopes. Eighteen new values of Jπ have been obtained for these nuclei. Values of the fullness and emptiness parameters V2 and U2 have been suggested for the 3s1/2 and 2d5/2 orbitals in 100Mo. (Nuclear structure 97Mo, 101Mo, measured J,π, and spectroscopic factors for states up to ~2.0 MeV using (d, p) and (t, d) reactions.)

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