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Charged-Particle Transport in the Condensed Phase

  • Marco Zaider
Part of the Basic Life Sciences book series (BLSC, volume 58)

Abstract

Traditionally, studies of the biological effects of ionizing radiation have rested on the triumvirate: (gas-phase) radiation physics, biophysical modeling, and radiation biology. Two technical developments, the advent of supercomputing as a routine tool in quantum solid-state material science and molecular dynamics on the one hand, and molecular biology on the other hand, have created—perhaps for the first time—the possibility of directly linking a more realistic description of the radiation field to observable events at biomolecular level. It also becomes increasingly clear that the identification of specific molecular targets imposes a challenge to the radiation physics community to be equally specific in treating the energy-deposition stage of radiation action. In this paper: a) I review—and exemplify with results from our own work—the current status in Monte Carlo simulation of gas-phase material (particle transport and stochastic chemistry); b) examine the link between these essentially geometric representations of the track and the concept of “spatial distribution of energy deposition,” a staple in radiation modeling; c) advocate an effort towards developing conceptually and calculationally, the field of solid-state microdosimetry; and d) describe methods based on semi-empirical Hamiltonians or quasi-particle techniques for obtaining the frequency-dependent and wave-vector-dependent dielectric response function for biomolecular crystalline systems, which are the main ingredients for describing charged-particle transport.

Keywords

Energy Deposition Linear Energy Transfer Energy Loss Function Dielectric Response Function Stochastic Chemistry 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Marco Zaider
    • 1
  1. 1.Center for Radiological ResearchCollege of Physicians & Surgeons of Columbia UniversityNew YorkUSA

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