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      https://www.ias.ac.in/article/fulltext/pram/085/02/0335-0343

    • Keywords

       

      Fusion–fission; fission time-scale; pre-scission time; saddle-to-scission time; pre-scission neutron multiplicity; pre-scission proton multiplicity; pre-scission 𝛼-particle multiplicity; pre-scission GDR 𝛾-ray multiplicity.

    • Abstract

       

      An overview of the experimental result on simultaneous measurement of pre-scission neutron, proton, 𝛼-particle and GDR 𝛾-ray multiplicities for the reaction 28Si+175Lu at 159 MeV using the BARC–TIFR Pelletron–LINAC accelerator facility is given. The data were analysed using deformation-dependent particle transmission coefficients, binding energies and level densities which are incorporated in the code JOANNE2 to extract fission time-scales and mean deformation of the saddle-to-scission emitter. The neutron, light charged particle and GDR 𝛾-ray multiplicity data could be explained consistently. The emission of neutrons seems to be favoured towards larger deformation as compared to charged particles. The pre-saddle time-scale is deduced as (0–2) × 10−21 s whereas the saddle-to-scission time-scale is (36–39) × 10−21 s. The total fission time-scale is deduced as (36–41) × 10−21 s.

    • Author Affiliations

       

      K Ramachandran1 A Chatterjee1 A Navin1 2 K Mahata1 A Shrivastava1 V Tripathi1 3 S Kailas1 V Nanal4 R G Pillay4 A Saxena1 R G Thomas1 D R Chakrabarty1 V M Datar1 Suresh Kumar1 P K Sahu1

      1. Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085, India
      2. GANIL, Bd. Henri Becquerel, BP 55027, Cedex-5, Caen, France
      3. Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
      4. Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Colaba, Mumbai 400 005, India

    • Dates

       
      Published
      August 2015
      Early published
      19 July 2015

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