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- Bragg-Gray cavity theory relates the radiation dose in a cavity volume of material to the dose that would exist in a surrounding medium in the absence of the cavity volume. It was developed in 1936 by British scientists Louis Harold Gray, William Henry Bragg, and William Lawrence Bragg. Most often, material is assumed to be a gas, however Bragg-Gray cavity theory applies to any cavity volume (gas, liquid, or solid) that meets the following Bragg-Gray conditions. 1.
* The dimensions of the cavity containing is small with respect to the range of charged particles striking the cavity so that the cavity does not perturb the charged particle field. That is, the cavity does not change the number, energy, or direction of the charged particles that would exist in in the absence of the cavity. 2.
* The absorbed dose in the cavity containing is deposited entirely by charged particles crossing it. When the Bragg-Gray conditions are met, then , where is the dose to material (SI unit Gray) is the dose to the cavity material (SI unit Gray) is the ratio of the mass-electronic stopping powers (also known as mass-collision stopping powers) of and averaged over the charged particle fluence crossing the cavity. In an ionization chamber, the dose to material (typically a gas) is where is the ionization per unit volume produced in the (SI unit Coulomb)is the mass of the gas (SI unit kg) is the mean energy required to produce an ion pair in divided by the charge of an electron (SI units Joules/Coulomb) (en)
- La théorie de Bragg–Gray ou théorie de la cavité est établie en 1935. Selon elle, l'ionisation produite dans une cavité remplie de gaz et placée dans un milieu est liée à l'énergie absorbée dans ce milieu environnant. Elle est à l'origine de la conception des chambres d'ionisation utilisées en physique des rayonnements ionisants. (fr)
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- 2748 (xsd:nonNegativeInteger)
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- La théorie de Bragg–Gray ou théorie de la cavité est établie en 1935. Selon elle, l'ionisation produite dans une cavité remplie de gaz et placée dans un milieu est liée à l'énergie absorbée dans ce milieu environnant. Elle est à l'origine de la conception des chambres d'ionisation utilisées en physique des rayonnements ionisants. (fr)
- Bragg-Gray cavity theory relates the radiation dose in a cavity volume of material to the dose that would exist in a surrounding medium in the absence of the cavity volume. It was developed in 1936 by British scientists Louis Harold Gray, William Henry Bragg, and William Lawrence Bragg. Most often, material is assumed to be a gas, however Bragg-Gray cavity theory applies to any cavity volume (gas, liquid, or solid) that meets the following Bragg-Gray conditions. When the Bragg-Gray conditions are met, then , where In an ionization chamber, the dose to material (typically a gas) is where (en)
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- Bragg–Gray cavity theory (en)
- Théorie de Bragg–Gray (fr)
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