STUDIES OF THE SECONDARY REACTION OF Li-CAPTURE IN LEAD
Production of astatine isotopes (At/sup 211/, At/sup 210/, and A< s2>s/ sup 07/) in lead bombarded with 80 to 660-Mev protons,75 to 370-Mev deuterons, and 210 to 810-Mev alpha particles was studied by the radiochemical method. The yield of At/sup 211/ bombarded with alpha particles amounts to 0.3 microbarn and practically does not depend on the energy of alpha -particles. When bombarded with protons and deuterons the yield rose with increasing energy and especially when bombarded with protons of energy higher than 400 Mev and reached 0.2 microbarn at 660 Mev. The yield of At/sup 211/ with respect to the thickness of a lead target was constant within 0.8 to 1.6 mm and decreased for targets less than 0.3 mm. The formation cross section and the energy spectrum of captured Li fragments were estimated by the yields of astatine isotopes from lead. The formation cross section of lithium fragments was 3 to 6 millibarn at 660 Mev. (auth)
- Research Organization:
- Joint Inst. for Nuclear Research, Dubna, U.S.S.R. Lab of Nuclear Problems
- NSA Number:
- NSA-15-009964
- OSTI ID:
- 4087345
- Report Number(s):
- JINR-D-502
- Country of Publication:
- USSR
- Language:
- English
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