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BETA-GAMMA CORRELATION AND TIME-REVERSAL INVARIANCE

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
The distribution function for the first-forbidden betagamma correlation for randomly oriented nuclei, including beta transverse polarization terms, is presented and discussed in connection with the question of timereversal invariance. Coulomab field effects are included and it is found that even for relatively small Z the timereversal testing asymmetry is reduced appreciably compared to that calculated for Z = 0 by Curtis and Lewis. In the limit of high ( alpha Z/2R), that is; for most firstforbidden decays, a definite relation exists between the ordinary directional correlation asymmetry and the beta polarization-dependent aysmmetries. In this approximation it is found that terms which test timereversal invariance appear in the same manner in all asymmetries but are dominated in general by contributions which do not test time-reversal invariance. For the particular case of Au/sup 198/ it is shown that the experimental results are consistent with time-reversal invariance but are also consistent with an appreciable violation of time-reversal invariance. It is concluded that under favorable conditions it is barely possible that an investigation of the asymmetries for some other betagamma cascade could provide a test for time-reversal invariance. However, the extent to which this invariance is or is not violated could not be determined by such an investigation. (auth)
Research Organization:
Univ. of Illinois, Urbana
NSA Number:
NSA-13-008064
OSTI ID:
4256532
Journal Information:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 112; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BETA DECAY
BETA PARTICLES
DECAY
DISTRIBUTION
ELECTRIC CHARGES
ELECTRIC FIELDS
GAMMA RADIATION
GOLD 198
INTERACTIONS
NUCLEI
PHYSICS AND MATHEMATICS
POLARIZATION