Wall-less ion-counting nanodosimetry applied to protons

Radiat Prot Dosimetry. 2002;99(1-4):325-30. doi: 10.1093/oxfordjournals.rpd.a006794.

Abstract

A wall-less ion-counting nanodosemeter, conceived for precise ionisation-cluster measurements in an accelerator environment, is described. The technique provides an accurate means for counting single radiation-induced ions, in dilute gas models of condensed matter. The sensitive volume dimensions, a few tissue-equivalent nm in diameter by a few tens of nm, are tunable by a proper choice of the gas pressure and electric fields; nanometric sub-sections can be electronically selected. Detailed ion-cluster distributions are presented for protons of 7.15, 13.6 and 19.3 MeV, in biologically relevant DNA-like sensitive volumes of low-pressure propane. Experimental results are compared to model simulations.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Computer Simulation
  • Dose-Response Relationship, Radiation
  • Models, Theoretical
  • Monte Carlo Method
  • Protons*
  • Radiometry / instrumentation*
  • Radiometry / methods

Substances

  • Protons