Abstract
A study has been made of the rays produced by the bombardment of by deuterons from the Brookhaven Van de Graff accelerator with particular emphasis on the rays from the reaction. A search for -emitting states and cascade transitions was made using a three-crystal pair spectrometer and other scintillation counters at bombarding energies up to 3.7 Mev. From coincidence measurements the assignment of the 0.81-Mev ray to the cascade transition between the 6.89- and 6.09-Mev states was confirmed and a previously unreported 0.62-Mev ray was assigned to the cascade transition between the 7.35-and 6.72-Mev states. Limits on the lifetimes of the 6.89-, 6.72-, and 6.1-Mev states were obtained from measurements of the Doppler shifts of the 0.81-, 6.72-, and 6.1-Mev rays. The lifetime limit for the 6.72-Mev state was combined with previous measurements to give a most probable assignment of for the 6.72-Mev state, while the lifetime limit for the 6.89-Mev state showed that the 0.81-Mev transition is chiefly dipole. Measurements of the angular correlation of the 0.81-and 6.1-Mev rays were interpreted by expressing the angular correlation functions in terms of the relative populations of the magnetic substates of the 6.89-Mev state. By this method an assignment of was obtained for the 6.89-Mev state.
- Received 16 October 1957
DOI:https://doi.org/10.1103/PhysRev.109.1199
©1958 American Physical Society