Rotational bands in Ho |
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Authors: | L. Funke K. -H. Kaun P. Kemnitz H. Sodan G. Winter |
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Affiliation: | Zentralinstitut für Kernforschung, Bereich 2, Rossendorf/Dresden, DDR |
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Abstract: | The excited states of the deformed odd-proton nucleus 161Ho have been studied in the reactions 159Tb(, 2n), 161Dy(d, 2n) and 161Dy(p, n). Gamma-ray spectra in single and coincidence modes as well as angular distributions and excitation functions of the transitions were measured. The proposed level scheme of 161Ho contains besides of the ground state band −[523] the bands +[404], +[411], +[411] and − [541] (band heads at 252.7, 298.7, 211.2 and 423.9 keV, respectively). An attempt was made to estimate the influence of Coriolis coupling between the bands + [411] and + [411], which are very close in energy. The + [404] band was found to de-excite by very fast E1 transitions to the ground state band −[523]. Nilsson retardation factors of about 0.03 for these transitions were deduced using the E2/E1 branching ratios. An investigation has also been made of the independent feeding of the levels from high-lying states. |
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Keywords: | Nuclear Reactions |
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