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      https://www.ias.ac.in/article/fulltext/pram/040/04/0299-0309

    • Keywords

       

      Nuclear fission235U(n,f); neutron emission spectra; nuclear mass; total kinetic energy; neutron multiplicities

    • Abstract

       

      The emission spectra of prompt fission neutrons from mass and kinetic energy selected fission fragments have been measured in235U(nth,f). Neutron energies were determined from the measurement of the neutron time of flight using a NE213 scintillation detector. The fragment energies were measured by a pair of surface barrier detectors in one set of measurements and by a back-to-back gridded ionization chamber in the second set of measurements. The data were analysed event by event to deduce neutron energy in the rest frame of the emitting fragment for the determination of neutron emission spectra and multiplicities as a function of the fragment mass and total kinetic energy. The results are compared with statistical model calculations using shell and excitation energy dependent level density formulations to deduce the level density parameters of the neutron rich fragment nuclei over a large range of fragment masses.

    • Author Affiliations

       

      M S Samant1 R P Anand1 R K Choudhury1 S S Kapoor1 K Kumar1 D M Nadkarni1 A Saxena1

      1. Nuclear Physics Division, Bhabha Atomic Research Centre, Bombay - 400 085, India
    • Dates

       
  • Pramana – Journal of Physics | News

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