Collective γ-vibrational bands in 165Ho and 167Er

G. Gervais, D. C. Radford, Y. R. Shimizu, M. Cromaz, J. DeGraaf, T. E. Drake, S. Flibotte, A. Galindo-Uribarri, D. S. Haslip, V. P. Janzen, M. Matsuzaki, S. M. Mullins, J. M. Nieminen, C. E. Svensson, J. C. Waddington, D. Ward, J. N. Wilson

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Abstract

The nuclear structures of 165Ho and 167Er have been investigated by means of Coulomb excitation. These nuclei excited at moderate spins exhibit γ-vibrational bands with Kπ = 11-/2 , 3-/2 in 165Ho and Kπ = 11+/2 in 167Er. The γ-vibrational bands in 165Ho are found to be isospectral; having very nearly identical in-band γ-ray energies. Gamma-ray branching ratios are analysed to extract information on collectivity and Coriolis mixing. Experimental results are compared with calculations performed with the Cranked Shell Model + RPA + particle-vibration coupling and by invoking the generalized intensity relations (GIR) in the unified model scheme. Although this model explains many features of the data, puzzling aspects such as identical transition energies for the bands in 165Ho remain unexplained. The role of the K quantum number in identical bands is discussed.

Original languageEnglish
Pages (from-to)257-274
Number of pages18
JournalNuclear Physics A
Volume624
Issue number2
DOIs
Publication statusPublished - Oct 6 1997

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nuclear structure
quantum numbers
rays
gamma rays
vibration
nuclei
energy
excitation

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Gervais, G., Radford, D. C., Shimizu, Y. R., Cromaz, M., DeGraaf, J., Drake, T. E., ... Wilson, J. N. (1997). Collective γ-vibrational bands in 165Ho and 167Er. Nuclear Physics A, 624(2), 257-274. https://doi.org/10.1016/S0375-9474(97)81838-6

Collective γ-vibrational bands in 165Ho and 167Er. / Gervais, G.; Radford, D. C.; Shimizu, Y. R.; Cromaz, M.; DeGraaf, J.; Drake, T. E.; Flibotte, S.; Galindo-Uribarri, A.; Haslip, D. S.; Janzen, V. P.; Matsuzaki, M.; Mullins, S. M.; Nieminen, J. M.; Svensson, C. E.; Waddington, J. C.; Ward, D.; Wilson, J. N.

In: Nuclear Physics A, Vol. 624, No. 2, 06.10.1997, p. 257-274.

Research output: Contribution to journalArticle

Gervais, G, Radford, DC, Shimizu, YR, Cromaz, M, DeGraaf, J, Drake, TE, Flibotte, S, Galindo-Uribarri, A, Haslip, DS, Janzen, VP, Matsuzaki, M, Mullins, SM, Nieminen, JM, Svensson, CE, Waddington, JC, Ward, D & Wilson, JN 1997, 'Collective γ-vibrational bands in 165Ho and 167Er', Nuclear Physics A, vol. 624, no. 2, pp. 257-274. https://doi.org/10.1016/S0375-9474(97)81838-6
Gervais G, Radford DC, Shimizu YR, Cromaz M, DeGraaf J, Drake TE et al. Collective γ-vibrational bands in 165Ho and 167Er. Nuclear Physics A. 1997 Oct 6;624(2):257-274. https://doi.org/10.1016/S0375-9474(97)81838-6
Gervais, G. ; Radford, D. C. ; Shimizu, Y. R. ; Cromaz, M. ; DeGraaf, J. ; Drake, T. E. ; Flibotte, S. ; Galindo-Uribarri, A. ; Haslip, D. S. ; Janzen, V. P. ; Matsuzaki, M. ; Mullins, S. M. ; Nieminen, J. M. ; Svensson, C. E. ; Waddington, J. C. ; Ward, D. ; Wilson, J. N. / Collective γ-vibrational bands in 165Ho and 167Er. In: Nuclear Physics A. 1997 ; Vol. 624, No. 2. pp. 257-274.
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AU - Flibotte, S.

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AU - Matsuzaki, M.

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