ANOMALOUS ELECTRIC DIPOLE CONVERSION COEFFICIENTS IN ODD-MASS ISOTOPES OF THE HEAVY ELEMENTS
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· Physical Review (U.S.) Superseded in part by Phys.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
A detalled review is given of experimental data on the anomalous L- and M-shell conversion coefficients of lowenergy electric dipole transitions observed in the decays of odd-A nuclei of high atomic number. The data are consistent in every case with the interpretation that the El conversion coefficients in the L/ sub III/ shell agree with the theoretical, model-independent coefficients calculated by Sliv and Band and by Rose. It is definitely established in several well-measured cases that the L/sub I/ and L/sub II/ coefficients are substantially larger than the theoretical values. The most striking anomaly occurs in the 84.2-kev transition in Pa/sup 231/ where the L/sub I/ and L/sub II/ coefficients are 21 and 15 times larger than the thecretical values, respectively. The experimental L/sub I/ and L/sub II/ coefficients are correlated with the lifetimes of the transitions, and it is shown that the magnitude of the anomaly (L/sub I/ plus L/sub II/) is proportional to the retardation in gamma-ray lifetime over that calculated from the single-proton formulas. No systematic trend was observed in the deviations of the L/sub I/ and L/sub II/ coefficients individually. ( auth)
- Research Organization:
- Univ. of California, Berkeley
- NSA Number:
- NSA-14-011104
- OSTI ID:
- 4201689
- 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- Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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: 117; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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