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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
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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.
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Khan, F. M. (2003). The physics of radiation therapy (3rd ed.). Lippincott
Williams & Wilkins: Philadelphia.
876:
Attix, F.H. (1986). Introduction to
Radiological Physics and Radiation Dosimetry, Wiley-Interscience: New York.
945:
451:
is the ratio of the mass-electronic stopping powers (also known as mass-collision stopping powers) of
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603:{\displaystyle D_{g}={\frac {Q}{m_{g}}}\cdot {\bar {{\Bigl (}{\frac {W}{e}}{\Bigr )}}}_{g}}
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265:{\displaystyle D_{m}=D_{g}\cdot {\bar {{\Bigl (}{\frac {S}{\rho }}{\Bigr )}}}_{g}^{m}}
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in the absence of the cavity volume. It was developed in 1936 by
British scientists
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444:{\displaystyle {\bar {{\Bigl (}{\frac {S}{\rho }}{\Bigr )}}}_{g}^{m}}
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averaged over the charged particle fluence crossing the cavity.
890:"Bragg-Gray theory and ion chamber dosimetry for photon beams"
747:{\displaystyle {\bar {{\Bigl (}{\frac {W}{e}}{\Bigr )}}}_{g}}
30:
relates the radiation dose in a cavity volume of material
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is deposited entirely by charged particles crossing it.
826:"An ionization method for the absolute measurement of
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is the mean energy required to produce an ion pair in
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to the dose that would exist in a surrounding medium
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774:divided by the charge of an electron (SI units
495:In an ionization chamber, the dose to material
177:When the Bragg-Gray conditions are met, then
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153:The absorbed dose in the cavity containing
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109:The dimensions of the cavity containing
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14:
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888:Ma, Chang-ming; Nahum, A. E. (1991).
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361:is the dose to the cavity material
24:
850:Proceedings of the Royal Society A
25:
1007:
894:Physics in Medicine & Biology
928:
689:is the mass of the gas (SI unit
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1:
150:in the absence of the cavity.
944:. You can help Knowledge by
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907:10.1088/0031-9155/36/4/001
803:
996:Theoretical physics stubs
308:is the dose to material
28:Bragg–Gray cavity theory
18:Bragg-Gray cavity theory
839:{\displaystyle \gamma }
824:, Louis Harold (1936).
863:10.1098/rspa.1936.0169
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682:{\displaystyle m_{g}}
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354:{\displaystyle D_{g}}
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301:{\displaystyle D_{m}}
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85:Most often, material
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938:theoretical physics
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649:{\displaystyle g}
629:{\displaystyle Q}
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508:{\displaystyle g}
484:{\displaystyle g}
464:{\displaystyle m}
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374:{\displaystyle g}
321:{\displaystyle m}
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166:{\displaystyle g}
143:{\displaystyle m}
122:{\displaystyle g}
98:{\displaystyle g}
72:Louis Harold Gray
63:{\displaystyle m}
43:{\displaystyle g}
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946:expanding it
935:
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897:
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867:. Retrieved
853:
849:
846:-ray energy"
612:
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856:: 578–596.
985:Categories
913:2023-02-20
869:2023-02-20
834:γ
733:¯
656:(SI unit
589:¯
556:⋅
425:¯
412:ρ
381:(SI unit
328:(SI unit
246:¯
233:ρ
213:⋅
787:See also
804:Sources
780:Coulomb
658:Coulomb
880:
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776:Joules
613:where
278:where
78:, and
940:is a
942:stub
878:ISBN
822:Gray
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471:and
383:Gray
330:Gray
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948:.
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195:m
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