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Article Dans Une Revue Radiat.Meas. Année : 2018

Radial electron fluence around ion tracks as a new physical parameter for the detection threshold of PADC using Geant4-DNA toolkit

Shogo Okada
  • Fonction : Auteur
Pierre Gillet
Masato Kanasaki
  • Fonction : Auteur
Yutaka Mori
  • Fonction : Auteur
Keiji Oda
  • Fonction : Auteur
Hisaya Kurashige
  • Fonction : Auteur
Michel Fromm
Pierre Cloutier
  • Fonction : Auteur
Andrew D. Bass
  • Fonction : Auteur
Léon Sanche
  • Fonction : Auteur
Satoshi Kodaira
Tomoya Yamauchi

Résumé

The detection threshold of poly(allyl dyglycol carbonate), PADC, for C ions is determined as 55 eV/nm in stopping power, which is significantly higher than that for proton and He ions. The stopping power is not a universal parameter for expressing the detection threshold of PADC. A new physical parameter of Radial Electron Fluence around Ion Tracks, REFIT, is proposed to describe the detection threshold of PADC. It is defined as the number density of electrons passing through the surface of a cylinder of a certain radius that is co-axial with the trajectory. Furthermore, preliminary calculations are presently being performed using the Monte Carlo simulation code of Geant4-DNA. The values of the REFIT at the detection thresholds for each ion are of the same order. Several issues affecting implementation of the REFIT paramter are discussed. These include the effects of impact parameter relating to the initial locations of secondary electrons, the effects of electron attachment below the cut off energy of 7.4 eV and the necessity of a more physically realistic medium than water for Monte Carlo simultaions.

Dates et versions

hal-02268455 , version 1 (20-08-2019)

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Citer

Tamon Kusumoto, Ziad El Bitar, Shogo Okada, Pierre Gillet, Nicolas Arbor, et al.. Radial electron fluence around ion tracks as a new physical parameter for the detection threshold of PADC using Geant4-DNA toolkit. Radiat.Meas., 2018, 118, pp.50-53. ⟨10.1016/j.radmeas.2018.08.015⟩. ⟨hal-02268455⟩
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