Abstract
For the investigation of vibrational states in odd A nuclei we have studied the level structure of239U by the238U (n thermal,γ) reaction. Various complementary measurement techniques as curved-crystal-, anti-Compton-,γ-γ coincidence- and conversion electron spectroscopy have been applied.
The resulting data have been used to establish the deexcitation scheme of239U up to ∼1.3 MeV and to make spin assignments. Most of the levels are interpreted in terms of the Nilsson model. The data also indicate the presence of the Nilsson states ¦501↺¦ and ¦750¦. Three members of theΒ-vibrational band built on the ¦631↺¦ state and one member of theΒ-vibration built on the ¦622↑¦ ground state have been identified through transitions with strongE0 admixtures. The octupole vibrational state built on the ¦631↺¦ band is proposed at 815 keV.
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Part of thesis of H.G. Börner, Technische Universität München, 1976
The authors are particularly grateful to Prof. O.W.B. Schult for his extensive support of the work, to Dr. R. Piepenbring for continuing discussions, to Dr. W.F. Davidson for reading the manuscript, to Dr. B. Kardon and N. Wüst for assistance in some of the data evaluation, to Dr. P. Jeuch for support in source preparation and to Mr. G. Schmid for technical assistance.
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Börner, H.G., Koch, H.R., Seyfarth, H. et al. Study of the level structure of239U using the thermal neutron capture reaction. Z Physik A 286, 31–43 (1978). https://doi.org/10.1007/BF01434611
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DOI: https://doi.org/10.1007/BF01434611