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Nuclear Fragmentation at Intermediate Energies in the DCM-QGSM-SMM Model

M. A. Martemianov, B. M. Abramov, S. A. Bulychjov, I. A. Dukhovskoy, V. V. Kulikov, A. A. Kulikovskaya, M. A. Matsyuk

Abstract

The development of nucleus-nucleus interaction models is a rapidly developing area of heavy-ion physics. Recently, a new model DCM-QGSM-SMM, developed at JINR and oriented toward use within the NICA project at energies of several GeV/nucleon, became available. However, the mechanisms of nuclear interactions used in this model can potentially operate effectively at lower energies. In this paper, the model predictions are compared with the FRAGM and FIRST/GSI experimental data in the energy range of nucleus-nucleus interactions starting from 300 MeV/nucleon, as well as with the predictions of other models used in this energy range.

Nuclear Fragmentation at Intermediate Energies in the DCM-QGSM-SMM Model

Abstract

The development of nucleus-nucleus interaction models is a rapidly developing area of heavy-ion physics. Recently, a new model DCM-QGSM-SMM, developed at JINR and oriented toward use within the NICA project at energies of several GeV/nucleon, became available. However, the mechanisms of nuclear interactions used in this model can potentially operate effectively at lower energies. In this paper, the model predictions are compared with the FRAGM and FIRST/GSI experimental data in the energy range of nucleus-nucleus interactions starting from 300 MeV/nucleon, as well as with the predictions of other models used in this energy range.
Paper Structure (6 sections, 5 figures)

This paper contains 6 sections, 5 figures.

Table of Contents

  1. INTRODUCTION
  2. MODEL DCM-QGSM-SMM
  3. CARBON FRAGMENTATION DATA FROM THE FRAGM EXPERIMENT
  4. CHARGED PIONS AT $^{12}$C FRAGMENTATION WITH AN ENERGY OF 3.2 GEV/NUCLEON
  5. ANGULAR DISTRIBUTIONS OF LIGHT FRAGMENTS
  6. CONCLUSION

Figures (5)

  • Figure 1: Differential cross sections $d^{2}\sigma/(dpd\Omega)$ of the light nuclei yield at $^{12}$C fragmentation with energies of 300 and 600 MeV/nucleon PaperFRAGMData1PaperFRAGMData2 in comparison with the predictions of four models of nucleus-nucleus interactions.
  • Figure 2: Differential cross sections d$\sigma$/d$\Omega$ of the light nuclei yield at $^{12}$C fragmentation as function of the incident nucleus energy ( a) - ( c), as well as angular distributions for protons ( d) and $^3$He ( e) at $^{12}$C fragmentation with energy $T_{0}$ = 950 MeV/nucleon. The angular acceptance of the FRAGM setup is marked by a horizontal line.
  • Figure 3: Momentum distributions of $\pi^{-}$ ( a) and the ratio of $\pi^{-}$ to $\pi^{+}$ ( b) yields at $^{12}$C fragmentation with energy 3.2 GeV/nucleon. Experimental data are from papers PaperFRAGM4PaperFRAGM5.
  • Figure 4: Momentum dependence of the ratio $\pi^{-}$ to $\pi^{+}$ yields at an angle less than $4^\circ$ at $^{12}$C fragmentation with energy 3.2 GeV/nucleon for various models of nucleus-nucleus interactions. The arrow indicates a pion momentum corresponding to the velocity of incident carbon nucleus.
  • Figure 5: Differential cross sections $d\sigma/d\Omega$ of the light fragments yield as function of the emission angle at $^{12}$C fragmentation on $^{197}$Au target with 400 MeV/nucleon obtained in the experiment FIRST/GSI PaperExpFIRST and in the models DCM-QGSM, DCM-QGSM-SMM