Related Experiment Video
Updated: Oct 27, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
Published on: May 9, 2014
Electron dose calculation using multiple-scattering theory: a hybrid electron pencil-beam model
1Center for Radiation Physics, Sichuan Union University, Chengdu, People's Republic of China. luozm@pridns.scuu.edu.cn
Abstract:
We have embedded the bipartition model into Fermi-Eyges multiple-scattering theory to produce a more accurate hybrid electron pencil-beam model, by using the fact that away from the edges of a large field, the electron distribution function exactly equals that for an infinitely wide electron beam. The bipartition model calculates various electron transport quantities in a homogeneous or horizontally layered medium with very high accuracy, for an infinitely broad beam. In our hybrid model, we use the bipartition model to calculate the longitudinal part of the pencil-beam distribution function, and the Fermi-Eyges theory to calculate its transverse part. Doing this allows calculation not only of dose distribution, but also of such quantities as electron fluence distribution, energy spectrum, angular distribution, and electron-charge distribution. Using the hybrid electron pencil-beam model, we have calculated the dose distribution for collimated electron beams and compared them with experimental data, for rectangular fields.
Related Concept Videos
The Quantum-Mechanical Model of an Atom
Electron Orbital Model
Scanning Electron Microscopy
Fundamental Principles
Accelerated...
The Bohr Model
Thomson's e/m Experiment
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...
The Energies of Atomic Orbitals