Translator Disclaimer
1 February 2005 A Monte Carlo Code for the Simulation of Heavy-Ion Tracks in Water
C. Champion, A. L'Hoir, M. F. Politis, P. D. Fainstein, R. D. Rivarola, A. Chetioui
Author Affiliations +
Abstract

Champion, C., L'Hoir, A., Fainstein, P. D., Rivarola, R. D., Chetioui, A. A Monte Carlo Code for the Simulation of Heavy-Ion Tracks in Water. Radiat. Res. 163, 222–231 (2005).

TILDA, a new Monte Carlo track structure code for ions in gaseous water that is valid for both high-LET (≈104 keV/ μm) and low-LET ions, is presented. It is specially designed for a comparison of the patterns of energy deposited by a large range of ions. Low-LET ions are described in a perturbative frame, whereas heavy ions with a very high stopping power are treated using the Lindhard local density approximation and the Russek and Meli statistical method. Ionization cross sections singly differential with energy compare well with the experiment. As an illustration of the non-perturbative interaction of high-LET ions, a comparison between the ion tracks of light and heavy ions with the same specific energy is presented (1.4 MeV/nucleon helium and uranium ions). The mean energy for ejected electrons was found to be approximately four times larger for uranium than for helium, leading to a much larger track radius in the first case. For electrons, except for the excitation cross sections that are deduced from experimental fits, cross sections are derived analytically. For any orientation of the target molecule, the code calculates multiple differential cross sections as a function of the ejection and scattering angles and of the energy transfer. The corresponding singly differential and total ionization cross sections are in good agreement with experimental data. The angular distribution of secondary electrons is shown to depend strongly on the orientation of the water molecule.

C. Champion, A. L'Hoir, M. F. Politis, P. D. Fainstein, R. D. Rivarola, and A. Chetioui "A Monte Carlo Code for the Simulation of Heavy-Ion Tracks in Water," Radiation Research 163(2), 222-231, (1 February 2005). https://doi.org/10.1667/RR3295
Received: 15 July 2003; Accepted: 1 July 2004; Published: 1 February 2005
JOURNAL ARTICLE
10 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top