The deformed N=60 nucleus41101Nb

H. Ohm, M. Liang, U. Paffrath, B. De Sutter, K. Sistemich, A. M. Schmitt, N. Kaffrell, N. Trautmann, T. Seo, K. Shizuma, G. Molnár, K. Kawade, R. A. Meyer

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Abstract

The β- decay of101Zr has been investigated at the fission-product separators JOSEF and LOHENGRIN. The half-life of101Zr has been determined to 2.5(1) s and a level scheme for101Nb has been established from γ ray singles as well as X/3 -γ and γ-γ coincidence measurements. Conversion coefficients for transitions in101Nb and level half-lives between 10 ps and 2 ns have been determined. Three rotational bands are identified among the low-lying levels with band heads at 0 keV, 206 keV and 208 keV. The bands are probably based on the Nilsson configurations [422 5/2+], [301 3/2-] and [303 5/2-], respectively. The deformation has been determined to βq=0.40(4) and 0.41(8) for the ground state band and the band based on the 206 keV level from the half-lives of the first and second excited members of these bands. This shows that the rapid onset of deformation at N=60 which is typical for the A=100 region of neutron-rich nuclei, takes also place in the Nb isotopes. Nilsson model calculations describe the experimental data well, especially the several determined transition probabilities including those for E1 transitions from the 206 and 208 keV band heads to the ground state.

Original languageEnglish
Pages (from-to)5-16
Number of pages12
JournalZeitschrift für Physik A: Hadrons and Nuclei
Volume340
Issue number1
DOIs
Publication statusPublished - Mar 1 1991

Keywords

  • 23.20.Ck
  • 2320.Lv
  • 27.60.+j

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Ohm, H., Liang, M., Paffrath, U., De Sutter, B., Sistemich, K., Schmitt, A. M., Kaffrell, N., Trautmann, N., Seo, T., Shizuma, K., Molnár, G., Kawade, K., & Meyer, R. A. (1991). The deformed N=60 nucleus41101Nb. Zeitschrift für Physik A: Hadrons and Nuclei, 340(1), 5-16. https://doi.org/10.1007/BF01284474