Monte Carlo study of electron spectra produced in semi-infinite and finite water phantoms irradiated by photons of energies up to 2 MeV
Journal Article
·
· Health Phys.; (United States)
A Monte Carlo calculation for the initial electron energy spectra produced in semi-infinite and finite water phantoms irradiated by photons of energies up to 2 MeV and photons from /sup 60/Co are presented incorporating successive Compton scattering, photoelectric absorption and Auger effect. The backscattering of photons through the top of the phantom and transmission of photons out of the finite phantom through the sides also are considered. The results are compared with the earlier calculation for infinite water phantom of Turner et al. who assumed that all the photons remained in the water until they were absorbed. It is found that inclusion of backscattering in a semi-infinite phantom yields significantly different results from those of Turner et al. for the infinite phantom. It is also found that backscattering and transmission of the photons through the sides of the finite phantom further alter the initial energy spectra of electrons, as well as the average number of electrons per photon at different photon incident energies.
- Research Organization:
- State Univ. of New York, Buffalo
- OSTI ID:
- 6170870
- Journal Information:
- Health Phys.; (United States), Journal Name: Health Phys.; (United States) Vol. 53:2; ISSN HLTPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
61 RADIATION PROTECTION AND DOSIMETRY
655003* -- Medical Physics-- Dosimetry
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
MOCKUP
MONTE CARLO METHOD
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PHANTOMS
PHOTONS
RADIOISOTOPES
SCATTERING
SPECTRA
STRUCTURAL MODELS
WATER
YEARS LIVING RADIOISOTOPES
655003* -- Medical Physics-- Dosimetry
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COBALT 60
COBALT ISOTOPES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
ENERGY SPECTRA
FERMIONS
HYDROGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 01-10
MINUTES LIVING RADIOISOTOPES
MOCKUP
MONTE CARLO METHOD
NUCLEI
ODD-ODD NUCLEI
OXYGEN COMPOUNDS
PHANTOMS
PHOTONS
RADIOISOTOPES
SCATTERING
SPECTRA
STRUCTURAL MODELS
WATER
YEARS LIVING RADIOISOTOPES