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Light particle emission in deeply inelastic collisions of 280 MeV40Ar+58Ni: Thermal equilibrium and angular momentum transfer

  • Nuclei
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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Protons andα-particles emitted in coincidence with a deep inelastic fragment produced in the reaction40Ar (280 MeV)+58Ni have been measured. From a detailed study of their in-plane angular distribution, it is shown that the bulk of the light charged particle emission can be attributed to a secondary evaporation process by the two primary deep inelastic fragments. A lowest estimate of the fragment spin (assuming total alignment perpendicular to the reaction plane) is obtained from the anisotropy of the out-of-plane angular distribution of theα-particles. For very asymmetric splitting, the heavy fragment spin estimate as obtained from theα-anisotropy measurement is consistent with the observed proton toα-particle multiplicity ratio. The results are in agreement with the hypothesis of a sticking configuration between two deformed nuclei.

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Author information

Author notes

  1. J. M. Alexander

    Present address: Department of Chemistry, State University of New York at Stony Brook, 11794, New York, USA

  2. T. H. Chiang

    Present address: Department of Physical Technics, University of Peking, Chine

Authors and Affiliations

  1. Département de Physique Nucléaire, C.E.N.-Saclay, Gif-sur-Yvette, France

    R. Babinet, B. Cauvin & J. Girard

  2. Institut de Physique Nucléaire, Orsay, France

    J. M. Alexander, T. H. Chiang, J. Galin, B. Gatty, D. Guerreau & X. Tarrago

Authors
  1. R. Babinet
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  2. B. Cauvin
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  3. J. Girard
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  4. J. M. Alexander
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  5. T. H. Chiang
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  6. J. Galin
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  7. B. Gatty
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  8. D. Guerreau
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  9. X. Tarrago
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Additional information

We would like to thank P. Bisénius, E. Nolte, J. Pouthas and P. Volkov for the very helpful technical assistance before and during the experiment. JMA is very grateful for hospitality at Orsay and for financial support as associated professor.

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Babinet, R., Cauvin, B., Girard, J. et al. Light particle emission in deeply inelastic collisions of 280 MeV40Ar+58Ni: Thermal equilibrium and angular momentum transfer. Z Physik A 295, 153–167 (1980). https://doi.org/10.1007/BF01413073

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  • DOI: https://doi.org/10.1007/BF01413073

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