Radiance and particle fluence
| Autor: | Jerry J. Battista, L Papiez |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Radioisotopes
Physics Radiological and Ultrasound Technology Physics::Instrumentation and Detectors Scattering business.industry Astrophysics::High Energy Astrophysical Phenomena Physics::Medical Physics Monte Carlo method Sampling (statistics) Reference Standards Radiation Radiation Dosage Fluence Computational physics Optics Radiance Scattering Radiation Dosimetry Linear Energy Transfer Radiology Nuclear Medicine and imaging Particle radiation Radiometry business Algorithms |
| Zdroj: | Physics in Medicine and Biology. 39:1053-1062 |
| ISSN: | 1361-6560 0031-9155 |
| DOI: | 10.1088/0031-9155/39/6/011 |
| Popis: | The concepts of radiance and fluence are fundamental to the description of a radiation field. The International Commission on Radiological Units and Measurements (ICRU) has defined fluence in terms of the number of the radiation particles crossing a small sampling sphere. A second definition has been proposed in which the length of track segments contained within any sampling volume are used to calculate the incident fluence. This approach is often used in Monte Carlo simulations of individual particle tracks, allowing the fluence to be scored in small volumes of any shape. In this paper we stress that the second definition generalizes the classical (ICRU) concept of fluence. We also identify the assumptions inherent in the two definitions of fluence and prove their equivalence for the case of straight-line particle trajectories. |
| Databáze: | OpenAIRE |
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