Exp 71 Ga and exp 73 Ga Levels as Observed in the (T,p) Reaction

摘要

A study of the (t,p) reaction on the two stable Ga isotopes has been performed. The reaction protons were analyzed in a Q3D spectrometer with a resulting energy resolution approximately 18 keV. Levels up to about 3 MeV excitation energy in exp 71 Ga and 2.75 MeV in exp 73 Ga were measured with 11 new levels observed in the first case and 18 in the second. The angular distributions have been compared to pure distributions observed in the exp 72 Ge(t,p) and exp 74 Ge(t,p) reactions at the same energy and found to correspond mostly to pure angular momentum (L) transfer although mixing of L's is allowed. A number of new spin assignments are made for Ga levels, and the results are used to discuss the spin of exp 73 Zn/sub g.s./. The striking splitting of the L=0 strength in three approximately equal components, observed in exp 73 Ga, strongly supports a transition in nuclear deformation between N=40 and 42. (Atomindex citation 10:481608)