ABSTRACT
Yield curves have been obtained for eight of the more important reactions of Li6 and Li7 produced by proton and deuteron bombardment in the energy range from 200 to 1000 kev. Each curve was obtained with an accuracy of about five percent, and a set of intercomparisons served to determine the relative yields between the different reactions within 20 percent. A special set of observations on a single reaction then gave the absolute yield for all the reactions within a factor of about three. An investigation was made of the reactions involved in the formation and decay of Li8, the mass of which was found to be 8.02499±0.00020. The range-distribution of the delayed alpha-particles from Li8 was measured and the interpretation of this distribution is discussed. Observations on the reaction Li6+n→He4+H3gave a value of 4.97 Mev for the reaction energy as compared to a value of 4.56 Mev derived from the masses involved. No evidence could be obtained for the production of Li8 by the process Li7+n→Li8. Measurements of the energies of the neutrons produced by deuteron bombardment of Li6 indicated that Be7 is formed by the reaction Li6+D2→Be7+n. Further experiments showed that Be7 is radioactive and is converted to Li7 by K-electron capture. It was found that this process is followed by gamma-ray emission in roughly ten percent of the transitions.
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