Experimental study of (He_,d) and (He_,t) reactions on Be_ and B__
Crosby, Mary Anne McCarthy
Legg, James C.
Master of Arts
The reactions Be9(He3,d)B110, Be9(He3, t)B9, B11(He3d )C12, and B11(He3, t )C11 were studied using a doubly ionized 10 MeV He3 beam. Particles were detected in a Delta E, E solid state counter telescope. The Delta E and E pulses were multiplied and also summed. The product pulses and summed pulses were then analyzed by a two-dimensional computer analyzer. Deuterons were observed leaving B10 at excitations of 0, 0.72, 1.74, 2.15, 3.59, 4.77, 5.16, 5.92, 6.16, and 6.57 MeV. (The 5.16 MeV group probably consists of the unresolved 5.16 and 5.18 MeV states.) Tritons were observed leaving B9 at excitations of 0 and 2.34 MeV. In addition, a typical three-body breakup continuum is seen in the triton spectra. Deuterons leaving at excitations of 0, 4.43 , 7.66 , 9.64, and 12.71 MeV were observed. Tritons were observed leaving C11 at excitations of 0 and 2.00 MeV. Excitation functions taken In the region of 10 MeV show no strong resonance structure. Angular distributions of these observed particles (except for the triton continuum) exhibit characteristic direct reaction features. Distorted wave Born approximation curves were fit to the data, and relative spectroscopic factors were calculated for the. (He3,d) reactions.