Accession Number : AD0600270

Title :   FEASIBILITY STUDY OF EM GENERATOR.

Descriptive Note : Final technical documentary rept., Nov 62-Dec 63,

Corporate Author : WESTINGHOUSE DEFENSE AND SPACE CENTER BALTIMORE MD

Personal Author(s) : Ruby,S. L.

Report Date : DEC 1963

Pagination or Media Count : 65

Abstract : In hopes of achieving laser-like action for gamma radiation, the stimulated emission of gamma rays, a prerequisite but easier task, was studied. Studies indicate that although there is no theoretical difficulty, even the mere demonstration of this effect in actual cases lies beyond present capabilities. In support of this conclusion, two experiments will be discussed. Both use nuclear absorption, rather than the theoretically almost identical stimulated emission process. The first experiment which was performed as part of this contract shows that the ''lifetime'' of a nuclear state depends on the entire system in which the nucleus is placed. The second experiment, performed in Russia and reported in the U. S. in early September 1963 demonstrated that the nuclear resonance absorption process can just be barely detected in a nucleus whose half-life is 63 seconds. As anticipated, the probability for this process is decreased by various line broadening mechanisms approximately six orders of magnitude below simple expectations. The observed effect is barely above statistical fluctuations. In conclusion: (1) In the best possible case, nuclear lifetime lengthening due to absorption can be barely observed, (2) Nuclear lifetime shortening-stimulated emission is more difficult to observe by a factor of at least 10 to the 7th power. (Author)

Descriptors :   (*ELECTROMAGNETIC RADIATION, GENERATORS), (*GAMMA EMISSION, SOURCES), (*NUCLEAR PHYSICS, GAMMA EMISSION), GAMMA RAYS, RESONANCE ABSORPTION, ISOMERIC TRANSITIONS, FEASIBILITY STUDIES, LASERS

Distribution Statement : APPROVED FOR PUBLIC RELEASE