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Investigation of low spin states in Cr48 with the MINIBALL γ-ray spectrometer

K. Jessen, A. Dewald, J. Eberth, G. Gersch, J. Jolie, N. Pietralla, T. Steinhardt, N. Warr, D. Weißhaar, V. Werner, P. von Brentano, and S. M. Lenzi
Phys. Rev. C 68, 047302 – Published 31 October 2003
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Abstract

Low spin states in the self-conjugate even-even nucleus Cr48 were investigated using the MINIBALL γ-ray spectrometer. At the FN TANDEM accelerator in Cologne the Ti46(He3,n) reaction was used for the measurement of γγ coincidences for an excitation function from 7 to 12MeV beam energy. Seventeen excited states were observed, nine for the first time by means of γ-ray spectroscopy, and new spin assignments were made. No excited states apart from the ground band were observed below 3.4MeV. First comparisons with different model calculations are given.

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  • Received 27 June 2003

DOI:https://doi.org/10.1103/PhysRevC.68.047302

©2003 American Physical Society

Authors & Affiliations

K. Jessen1, A. Dewald1, J. Eberth1, G. Gersch1, J. Jolie1, N. Pietralla1, T. Steinhardt1, N. Warr1, D. Weißhaar1, V. Werner1, P. von Brentano1, and S. M. Lenzi2

  • 1Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, D–50937 Köln, Germany
  • 2Dipartimentio di Fisica, University of Padova, Via F. Marzolo 8, I–35131 Padova, Italy

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Vol. 68, Iss. 4 — October 2003

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  • Figure 1
    Figure 1
    Background subtracted coincidence spectra gated by the 2+→0+ transition. The intensity of the 6+→4+ decay increases with the beam energy, contrary to the constancy of the 4−→4+ transition. Measuring time and beam energy are given in the upper right corner of each spectrum.Reuse & Permissions
  • Figure 2
    Figure 2
    Level scheme of Cr48 from this work. The tentative spin value(s) of the 3632−keV level is taken from Ref. 12 and in accordance with our result.Reuse & Permissions
  • Figure 3
    Figure 3
    Depopulating intensities of different levels (gated from below, see text) normalized to the value at 7MeV and the 41+→21+ decay. The reference curves for the 41+ and 61+ states are drawn solid, the curves for the negative parity band are dashed, and the ones obtained from both decays of the 4063−keV level are dotted.Reuse & Permissions
  • Figure 4
    Figure 4
    Comparison of experimental level energies for positive parity states aside from the ground band with the results from our shell model calculation and from Ref. 7. States of unknown parity are drawn with dotted lines.Reuse & Permissions
  • Figure 5
    Figure 5
    Comparison of experimental level energies in the Kπ=4− band with the results from [3, 7].Reuse & Permissions
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