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Features of the Fission Fragments Formed in the Heavy Ion induced \(^{32}\hbox {S}\)+\(^{197}\hbox {Au}\) reaction near the interaction barrier

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Abstract

The features of fission fragments formed in the near barrier reaction \(^{32}\hbox {S}\) + \(^{197}\hbox {Au}\) (\(E^\mathrm{lab}_\mathrm{beam}=166\,\hbox {MeV}\)) are investigated. The measurement was performed at the ALTO facility of IPN Orsay, France, with the aim of clarifying the quantitative contribution of the quasi-fission process to the total fission events. The mass and total kinetic energy of the fission fragments were compared to the expectations of the liquid drop model, revealing an asymmetric fission component which may be traced back to a quasi-fission process mixed with the fusion–fission events. The \(\gamma \)-rays and neutrons measured in coincidence with the fission fragments were used to yield additional information for the discrimination of the two aforementioned mechanisms. All observed trends are consistent and fairly well reproduced by the statistical model.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The data that support the findings of this study are available from the corresponding author upon reasonable request granted all coauthors agree.]

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Acknowledgements

We would like to thank the IPNO accelerator group for the quality beam and smooth running throughout the experiment. The use of detectors from the Gammapool European Spectroscopy and France UK (IN2P3/STFC) LoanPool Resources through the ORGAM (OrsayGammaArray) project is gratefully acknowledged. We also want to acknowledge the PARIS ongoing collaboration. This work was supported by FLNR, JINR, the IN2P3-JINR Agreement No 14-90 and 00-50, the ENSAR2 project “N-SI-88”, by the financial contribution of Romania to the Joint Institute of Nuclear Research (JINR-RO) to the 03-5-1094-2010/2016 and 03-5-1130-2017/2021 themes, by the Polish National Science Centre under Contract No. 2013/08/M/ST2/00257 and the French LEA COPIGAL project.

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Authors and Affiliations

  1. Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, Russia

    E. M. Kozulin, I. M. Harca, I. Itkis, G. Knyazheva, K. Novikov, N. Kozulina, I. V. Kolesov, E. Saveleva & V. V. Kirakosyan

  2. Dipartimento di Fisica “E. Pancini”, Universita’ di Napoli “FedericoII”, Naples, Italy

    E. Vardaci, M. Ashaduzzaman, B. DeCanditiis, A. Pulcini, D. Quero, P. Rath, A. di Nitto & G. La Rana

  3. Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Naples, Italy

    E. Vardaci, M. Ashaduzzaman, B. DeCanditiis, A. Pulcini, D. Quero, P. Rath, A. di Nitto & G. La Rana

  4. IPN, CNRS/IN2P3, Université Paris-Saclay, 91405, Orsay, France

    I. Matea, J. Wilson & D. Verney

  5. Institute of Nuclear Physics PAN, Krakow, Poland

    A. Maj & M. Ciemala

  6. IPHC, CNRS/IN2P3, Université de Strasbourg, 67037, Strasbourg, France

    O. Dorvaux & C. Schmitt

  7. Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Milan, Italy

    S. Brambilla, A. Bracco, F. Camera & O. Stezowski

  8. Università di Milano, Milan, Italy

    A. Bracco, F. Camera & O. Stezowski

  9. Horia Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Magurele, Bucharest, Romania

    I. M. Harca, C. Borcea, S. Calinescu & C. Petrone

  10. Accelerator Laboratory of University of Jyväskylä (JYFL), Jyväskylä, Finland

    W. H. Trzaska

Authors
  1. E. M. Kozulin
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  2. I. M. Harca
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  3. E. Vardaci
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  4. I. Matea
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  5. A. Maj
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  7. G. Knyazheva
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  10. M. Ciemala
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  11. S. Brambilla
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  12. N. Kozulina
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  13. I. V. Kolesov
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  14. E. Saveleva
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  15. V. V. Kirakosyan
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  16. C. Schmitt
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  20. M. Ashaduzzaman
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  21. B. DeCanditiis
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  23. D. Quero
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  24. P. Rath
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  25. A. di Nitto
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  26. G. La Rana
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  27. A. Bracco
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  28. F. Camera
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  29. O. Stezowski
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  30. J. Wilson
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  31. D. Verney
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  32. W. H. Trzaska
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Consortia

SPS and the PARIS collaboration

Corresponding author

Correspondence to I. M. Harca.

Additional information

Communicated by A. Obertelli

The PARIS collaboration.

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Kozulin, E.M., Harca, I.M., Vardaci, E. et al. Features of the Fission Fragments Formed in the Heavy Ion induced \(^{32}\hbox {S}\)+\(^{197}\hbox {Au}\) reaction near the interaction barrier. Eur. Phys. J. A 56, 6 (2020). https://doi.org/10.1140/epja/s10050-019-00019-5

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