INVESTIGATION OF THE DECAY OF Ba$sup 133$ AND Cs$sup 134$ BY $gamma$- $gamma$ DIRECTIONAL CORRELATION MEASUREMENTS (in German)
The directional correlations of the - cascades following the decay of Ba/sup 133/ were measured: 355--81, 302-81, 79-81, and 276-- 160 kev. The results of these measurements together with results of other authors yielded the following well-defined values for ths spin of the levels of Cs/sup 133/: 7/2/ sup +/ (ground state), 5/2/sup +/ (81-kev level), 5/2/sup +/ (1 60-kev level), 3/ 2/sup +/ (383-kev level), and 1/2/sup +/ (436-kev level). The results are discussed in the frame of the shell model. The decay of Cs/sup 134/ was investigated by measurement of the directional correlations: 800-- 600 kev, 600--600 kev, 1.04-Mev-605 kev. A discussion of these resuits yielded for the mixing proportion deg C). The re of the gamma radiation from the transition of the second to first 2/sup +/ state in Ba/sup 134/ a value deg C). The re = -- 0.50 surface proces 0.05 in contradiction to the theory of Davydov and Filippon. Spin 2 was obtained for the 1.64-Mev level of Ba/sup 134/; the parity of this state is probably negative. (tr-auth) external conversion (in uranium) electron spectra were examined with the materials at -spectrometer over a range of transition energies from 20 kev to 2.5 mev. The energies and relative intensities of the observed nuclear transitions are reported and discussed. In addition to finding two previously unseen transitions (945 kev, 2.64 Mev) and a new energy level, the energies of the other excited states are defined more accurately than in previously published work. A revised level scheme, which incorporates the findings of this study, was constructed for Ti/sup 48/. Systematic comparisons were made between the revised level scheme of Ti/sup 48/ and the level structure of neighboring nuclei. Several theoretical descriptions of nuclear structure were also compared to the revised ievel scheme. It is conciuded that none of the present nuclear models account fully for the observed structure, but that many of the observed features are explicable in terms of current theory. (Dissertation Abstr.)
- Research Organization:
- Technische Hochschule, Braunschweig, Ger.
- NSA Number:
- NSA-17-026620
- OSTI ID:
- 4666677
- Journal Information:
- Z. Physik, Journal Name: Z. Physik Journal Issue: 1 Vol. Vol: 174; ISSN 1434-6001
- Country of Publication:
- Country unknown/Code not available
- Language:
- German
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