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- W63851549 abstract "Energies and relative intensities of gamma transitions in 152Sm, 152Gd, 154Gd, 166Er, and 232U following radioactive decay have been measured with a Ge(Li) spectrometer. A peak fitting program has been developed to determine gamma ray energies and relative intensities with precision sufficient to give a meaningful test of nuclear models. Several previously unobserved gamma rays were placed in the nuclear level schemes. Particular attention has been paid to transitions from the beta and gamma vibrational bands, since the gamma ray branching ratios aresensitive tests of configuration mixing in the nuclear levels. As the reduced branching ratios depend on the multipolarity of the gamma transitions, experiments were performed to measure multipole mixing ratios for transitions from the gamma vibrational band. In 154Gd, angular correlation experiments showed that transitions from the gamma band to the ground state band were predominantly electric quadrupole, in agreement with the rotational model. In 232U, the internal conversion spectrum has been studied with a Si(Li) spectrometer constructed for electron spectroscopy. The strength of electric monopole transitions and the multipolarity of some gamma transitions have been determined from the measured relative electron intensities. The results of the experiments have been compared with the rotational model and several microscopic models. Relative B(E2) strengths for transitions from the gamma band in 232U and 166Er are in good agreement with a single parameter band mixing model, with values of z2= 0.025(10) and 0.046(2), respectively. Neither the beta nor the gamma band transition strengths in 152Sm and 154Gd can be accounted for by a single parameter theory, nor can agreement be found by considering the large mixing found between the beta and gamma bands. The relative B(E2) strength for transitions from the gamma band to the beta band in 232U is found to be five times greater than the strength to the ground state band, indicating collective transitions with strength approximately 15 single particle units." @default.
- W63851549 created "2016-06-24" @default.
- W63851549 creator A5087743079 @default.
- W63851549 date "1969-01-01" @default.
- W63851549 modified "2023-09-22" @default.
- W63851549 title "Beta and Gamma Vibrational Bands in Deformed Nuclei." @default.
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- W63851549 doi "https://doi.org/10.7907/vnzf-eb77." @default.
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