Improved empirical parameterization for projectile fragmentation cross sections

B. Mei
Phys. Rev. C 95, 034608 – Published 17 March 2017

Abstract

A new empirical parametrization is developed for calculating the fragment cross sections in projectile fragmentation reactions at high energies (>100 MeV/nucleon). The new parametrization, FRACS, consists of two main parts, i.e., the mass yield and the isobaric distribution, on the basis of previous parametrizations. The formalism for the mass yield is improved to describe the target and the projectile energy dependences observed in measured fragmentation cross sections. The parametrization of the isobaric distribution is also modified to reproduce recent experimental data. Furthermore, an additional term is proposed and first implemented in the FRACS parametrization to account for the evident odd-even staggering effect observed in many experimental cross sections. Comparisons with extensive cross sections measured in various fragmentation reactions reveal that FRACS is in much better agreement with experimental data and can reproduce measured cross sections in most cases within a factor of 1.84, which is a much smaller rms deviation as compared to that of the recent parametrization EPAX3.

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  • Received 12 January 2017
  • Corrected 30 March 2017

DOI:https://doi.org/10.1103/PhysRevC.95.034608

©2017 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Corrections

30 March 2017

Erratum

Authors & Affiliations

B. Mei*

  • Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Extreme Light Infrastructure Nuclear Physics, “Horia Hulubei” National Institute for Physics and Nuclear Engineering, Strada Reactorului 30, 077125 Bucharest Magurele, Romania; and GSI-Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany

  • *meibo@impcas.ac.cn

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Issue

Vol. 95, Iss. 3 — March 2017

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