EFFECT OF COMPRESSION ON THE DECAY RATE OF Tc$sup 99$m METALEFFECT OF COMPRESSION ON THE DECAY RATE OF Tc$sup 99$m METAL

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 Author Porter, R. A. ♦ McMillan, W. G. Source United States Department of Energy Office of Scientific and Technical Information Content type Text Language English
 Subject Keyword PHYSICS ♦ DIFFERENTIAL EQUATIONS ♦ ELECTRIC POTENTIAL ♦ ELECTRONS ♦ GAMMA RADIATION ♦ HALF-LIFE ♦ INTERNAL CONVERSION ♦ ISOMERS ♦ METALS ♦ NUCLEAR THEORY ♦ PRESSURE ♦ QUANTUM MECHANICS ♦ STATISTICS ♦ TECHNETIUM 99 ♦ THERMODYNAMICS ♦ VOLUME Abstract ABS>The Thomas-Fermi statistical potential was employed to obtain the initial and final state electronic wave functions for two volumes: the normal uncompressed state and the 10% compressed state. The compressibility of technetium metal was estimated to be 0.27 megabar/sup -1/. From this compressibility and the assumption that the internal conversion coefficient is linear in pressure, the fractional decrease in lifetime was calculated to be 2 to 4 x 10/sup -4/ for the experimental pressure of 0.1 megabar. This result agrees well with Bainbridge's measurement, 2.3 plus or minus 0.5 x 10/sup -4/. (auth) ISSN 0031899X Educational Use Research Learning Resource Type Article Publisher Date 1960-02-01 Publisher Department Univ. of California, Livermore ♦ Univ. of California, Los Angeles ♦ RAND Corp., Santa Monica, Calif. Journal Physical Review Volume Number 117 Organization Univ. of California, Livermore ♦ Univ. of California, Los Angeles ♦ RAND Corp., Santa Monica, Calif.