The heavy-ion reactions (a,2n) and ("O,p2n) have been used to study by y-ray spectroscopy the nuclei "As and ' As with emphasis on high-spin states. Spin and parity assignments were made on the basis of coincidence measurements, angular distributions, and excitation functions. Level schemes for "As and "As have been constructed which contain a stretched spin band on a g9/2 state. NUCLEAR REACTIONS ' Ga(o. , 2n), E =17-24 MeV; ' Fe( O, p2n), Eo =40-52.5 Me&; measured E", I~, cr(E, Ey), I~(8), p-y coincidence; 7 As, 7 As deduced levels, J, m; enriched targets; Ge(Li).

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V3Se has been investigated by the reaction 7~Gamma excitation functions (E~=10-16 MeV), gamma angular distributions (E~= 18 MeV) and gamma-gamma coincidences (E~=15 MeV) have been taken. A level scheme has been established, spins and partities have been assigned. States of a rotational band on the 151.2 keV (5/2-) state and an anomalous band have been identified. Nuclear Reaction 7~nT) E~= 15 and 18 MeV; measured E~, I,~, ~-7-coin., y-angular distribution, y-excitation function. 73Se deduced levels, J, ~. Enriched target, Ge(Li).

Abstract. The 72Ge(~, n)75Se and 73Ge(0~, 2n)75Se reactions have beer studied at bombarding energies of 15 MeV and 22.5 MeV respectively using Ge(Li)-detectors. 7-singles spectra, 7-7-coincidences, ";-angular distributions and excitation functions have been taken. A level scheme has been constructed, which contains a stretched spin and a normal rotational band. Nuclear reactions ~2Ge(~,n)VSSe, 73Ge(c~,2n)75Se; measured E., I~, ~'-7-coincidences, 7-angular distribution, 7-excitation function. 75Se deduced levels, J, 7t, 7-multipolarity. Enriched target, Ge(Li).

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