Preequilibrium neutron emission in heavy ion reaction: Mean field effect and multiple emission

Sabyasachi Paul, Maitreyee Nandy, A. K. Mohanty, and Y. K. Gambhir
Phys. Rev. C 94, 034607 – Published 8 September 2016

Abstract

Effects of nuclear mean field and of multiple preequilibrium (PEQ) emission on double differential neutron multiplicity distribution from heavy ion reactions (C12+Ho165 and Ne20+Ho165) at 10–30 MeV/u have been investigated in the framework of the semiclassical formalism for heavy ion reaction (henceforth termed “HION”) developed earlier. HION follows the equilibration of a target+projectile composite system through the kinematics of two-body scattering. In the present work nuclear density distribution in the composite system is estimated in the relativistic mean field (RMF) approach. The nucleon-nucleon collision rates and subsequently the nucleon emission probability are calculated from this density distribution. A second approach based on a semiphenomenological formalism is also used for nuclear density distribution. Energy-angle distribution of neutron multiplicities calculated with this modified HION model coupled with multiple PEQ emission could reproduce the measured data of earlier workers in the projectile energy range of 10–30 MeV/u.

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  • Received 17 June 2016

DOI:https://doi.org/10.1103/PhysRevC.94.034607

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Sabyasachi Paul1, Maitreyee Nandy2,*, A. K. Mohanty2, and Y. K. Gambhir3,4

  • 1Health Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
  • 2Saha Institute of Nuclear Physics, 1/AF, Bidhannagar, Kolkata 700064, India
  • 3Manipal Centre for Natural Sciences, Manipal University, Manipal 576104, India
  • 4Department of Physics, IIT Bombay, Powai, Mumbai 400076, India

  • *maitreyee.nandy@saha.ac.in

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Vol. 94, Iss. 3 — September 2016

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