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A unified model of preequilibrium decay

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

A microscopic exciton model has been developed which describes the time evolution of a highly excited nucleus through a series of binary collisions creating additional particle-hole pairs. Starting from an arbitrary exciton density distribution, the spectral shapes of the succeeding stages are generated through recursion relations which keep track of the “exciton flux” explicitely. The computer code BEEFALO provides particle spectra and average life times of the successive stages. The results are compared with the predictions of other preequilibrium models using “equal probability” density distributions. The controversy about the use of single particle orn-exciton state life times has been resolved by showing that both approaches lead to the same particle spectra if proper book-keeping is made through appropriate recursion relations.

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Authors and Affiliations

  1. Institut für Strahlen- und Kernphysik der Universität Bonn, Deutschland

    J. Ernst & Jayanti Rama Rao

Authors
  1. J. Ernst
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  2. Jayanti Rama Rao
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Additional information

On leave from Andhra University, Visakhapatnam 530003, India

The authors are grateful to Prof. Dr. T. Mayer-Kuckuk for his continued interest and encouragement. They are indebted to Dr. M. Böhning for stimulating suggestions and comments. Their thanks are also due to Professor M. Blann for enlightening discussions during his stay at Bonn. Useful discussions with Dr. J. Bisplinghoff are very much appreciated. One of the authors (J. R. R) wishes to acknowledge the receipt of a fellowship from the Heinrich-Hertz-Stiftung.

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Ernst, J., Rao, J.R. A unified model of preequilibrium decay. Z Physik A 281, 129–135 (1977). https://doi.org/10.1007/BF01408624

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  • DOI: https://doi.org/10.1007/BF01408624

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