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Rotation of nuclei around a prolate symmetry axis at very high spin states

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Classically one expects that nuclei rotate at very high spins (30≦I≦80) around an oblate symmetry axis. It is shown that strong shell correction energies yield for some nuclei at the end of the rare earth region and in the Pb-region yrast states for a rotation around a prolate symmetry axis. Like for the rotation around an oblate symmetry axis one expects also here yrast traps. The deformation energy surfaces for very high spin states are calculated by the Strutinsky method using a Saxon-Woods potential and by a microscopic method built on constraint Nilsson functions. Both methods agree qualitatively. Yrast traps are studied for these nuclei. It is shown that the MONA (Maximisation of theOverlap ofNuclear wave functions byAlignment) effect prefers at high spin rotation around the symmetry axis of a negative deformed shape at the beginning of the shell and of positive deformation at the end of the shell.

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Author notes

  1. M. Ploszajczak

    Present address: Institute of Nuclear Physics, Radzikowskiego 152, Cracow, Poland

  2. Amand Faessler

    Present address: KFA Jülich, West Germany

Authors and Affiliations

  1. Institut für Kernphysik, Kernforschungsanlage Jülich, Jülich, West Germany

    M. Ploszajczak & H. Toki

  2. Department of Physics, State University of New York, Stony Brook, New York, USA

    Amand Faessler

Authors
  1. M. Ploszajczak
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  2. H. Toki
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  3. Amand Faessler
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Additional information

Work supported in part by USERDA contract no. E(11-1)-3001

The authors would like to express their sincere gratitude to Dr. M. Anastasio for the critical reading of the manuscript. They would also like to thank Drs. K.R. Sandhya Devi, G. Leander and I. Ragnarsson for numerous discussions.

One of the authors (A.F.) would like to express his gratitude to Prof. G.E. Brown for his hospitality during the stay at the Physics Department of the University of New York at Stony Brook.

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Ploszajczak, M., Toki, H. & Faessler, A. Rotation of nuclei around a prolate symmetry axis at very high spin states. Z Physik A 287, 103–119 (1978). https://doi.org/10.1007/BF01408366

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  • DOI: https://doi.org/10.1007/BF01408366

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