Experimental investigation on the temperature dependence of the nuclear level density parameter

Balaram Dey, Deepak Pandit, Srijit Bhattacharya, K. Banerjee, N. Quang Hung, N. Dinh Dang, Debasish Mondal, S. Mukhopadhyay, Surajit Pal, A. De, and S. R. Banerjee
Phys. Rev. C 91, 044326 – Published 30 April 2015

Abstract

The effect of temperature T and angular momentum J on the inverse level density parameter k has been studied by populating the compound nucleus Tc97 in the reaction He4+Nb93 at four incident beam energies of 28, 35, 42, and 50 MeV. For all four energies, the value of k decreases with increasing J. The T dependence of k has been compared for two angular momentum windows with different theoretical predictions as well as with the finite-temperature BCS calculation which takes into account the quasiparticle-number fluctuations in the pairing field (FTBCS1). Interestingly, the experimental data are in good agreement with the theoretical calculations at higher J but deviate from all the calculations at lower J.

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  • Received 7 January 2015
  • Revised 9 April 2015

DOI:https://doi.org/10.1103/PhysRevC.91.044326

©2015 American Physical Society

Authors & Affiliations

Balaram Dey1, Deepak Pandit1, Srijit Bhattacharya2, K. Banerjee1, N. Quang Hung3, N. Dinh Dang4, Debasish Mondal1, S. Mukhopadhyay1, Surajit Pal1, A. De5, and S. R. Banerjee1,*

  • 1Variable Energy Cyclotron Centre, 1/AF-Bidhannagar, Kolkata-700064, India
  • 2Department of Physics, Barasat Govt. College, Barasat, N 24 Pgs, Kolkata-700124, India
  • 3School of Engineering, Tan Tao University, Tan Tao University Avenue, Tan Duc Ecity, Duc Hoa, Long An Province, Vietnam
  • 4Theoretical Nuclear Physics Laboratory, Nishina Center for Accelerator-Based Science, RIKEN, 2-1, Hirosawa, Wakocity, Saitama 351-0198, Japan and Institute for Nuclear Science and Technique, Hanoi, Vietnam
  • 5Department of Physics, Raniganj Girls' College, Raniganj-713358, India

  • *srb@vecc.gov.in

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Issue

Vol. 91, Iss. 4 — April 2015

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