Abstract:
Light particles in coincidence with evaporation residues and heavy fragments have been measured by a 4π charged-particle detector at the INFN Laboratori Nazionali di Legnaro (Padua) for the 240 MeV 32S + 100Mo reaction leading to the 132Ce composite system at 152 MeV of excitation energy. Energy spectra of the alpha-particles in coincidence with fission fragments were extracted for many correlation angles both in plane and out of plane. A prominent out-of-plane emission was observed, consistent with the pattern for the near-scission emission. From the fit to the spectra, the pre-scission alpha-particle multiplicity of 0.040±0.006 was obtained. This value is reproduced by the code PACE2 without the inclusion of a delay time for fission. The presence of fast fission, which could be responsible for this result, is discussed.
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Received: 6 August 2002 / Accepted: 9 October 2002 / Published online: 4 February 2003
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Communicated by C. Signorini
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La Rana, G., Brondi, A., Moro, R. et al. Search for dynamical effects in the fission decay in the 240 MeV 32S + 100Mo reaction. Eur Phys J A 16, 199–207 (2003). https://doi.org/10.1140/epja/i2002-10091-y
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DOI: https://doi.org/10.1140/epja/i2002-10091-y