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The deformedN=60 nucleus 10141 Nb

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Zeitschrift für Physik A Hadrons and Nuclei

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 fromγ 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.

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Author information

Author notes

  1. R. A. Meyer

    Present address: U.S. Department of Energy, Division of Nuclear Physics (ER-23), 20585, Washington, D.C., USA

Authors and Affiliations

  1. Institut für Kernphysik, Forschungszentrum Jülich, Postfach 1913, W-5170, Jülich, Federal Republic of Germany

    H. Ohm & K. Sistemich

  2. Institut für Kernchemie, Universität Mainz, Fritz-Strassmann-Weg 2, W-6500, Mainz, Federal Republic of Germany

    M. Liang, A. -M. Schmitt, N. Kaffrell & N. Trautmann

  3. Research Reactor Institute, Kyoto University, Kumatori-cho, Senna-gun, 590-04, Osaka, Japan

    U. Paffrath & T. Seo

  4. Faculty of Engineering, Hiroshima University, Shitami, 724, Saijocho Higashi-Hiroshima, Japan

    B. De Sutter & K. Shizuma

  5. Institute of Isotopes, Hungarian Academy of Sciences, H-1525, Budapest, Hungary

    G. Molnár

  6. Department of Nuclear Engineering, Faculty of Engineering, Nagoya University, Furo-cho, Chikusa-ku, 464, Nagoya, Japan

    K. Kawade

  7. Montgomery College, 20012, Takoma Park, MD, USA

    R. A. Meyer

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Additional information

Dedicated to Prof. Dr. P. Armbruster on the occasion of his 60th birthday

Prof. P. Armbruster's impact was of decisive significance for the realization of the separators Josef and Lohengrinn in the early seventies. The authors express their deep appreciation for these initiatives which provided them with a basis for many years of fruitful research, and they acknowledge with pleasure his continuous interest in their work.

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Ohm, H., Liang, M., Paffrath, U. et al. The deformedN=60 nucleus 10141 Nb. Z. Physik A - Hadrons and Nuclei 340, 5–16 (1991). https://doi.org/10.1007/BF01284474

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