Effects of incoherent and coherent scattering on the exposure buildup factors of low-energy gamma rays
Journal Article
·
· Nucl. Sci. Eng.; (United States)
OSTI ID:6720339
The effects of including incoherent and coherent scattering in a calculation of the exposure buildup factors for plane normal gamma-ray sources have been investigated by using an electron-gamma-ray shower Monte Carlo code, EGS4, for water, iron, and lead in the 40- to 200-keV range. The ''true'' buildup factors for practical uses are defined to clarify the effects of bound-electron Compton (incoherent) and coherent scattering and are tabulated for penetration depths up to 10 mfp. The pseudo buildup factor increases by including incoherent scattering and decreases by including coherent scattering. The degree of each effect varies with the atomic number of the material. The effect of incoherent scattering is large for materials of small atomic number, and the effect of coherent scattering is large for materials of large atomic number.
- Research Organization:
- National Lab. for High Energy Physics, 1-1 oho, Tsukuba-shi, Ibaraki-ken 305 (JP)
- OSTI ID:
- 6720339
- Journal Information:
- Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 99:2; ISSN NSENA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360106 -- Metals & Alloys-- Radiation Effects
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOMIC NUMBER
BEAMS
CALCULATION METHODS
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
ENERGY RANGE
GAMMA RADIATION
GAMMA SOURCES
HYDROGEN COMPOUNDS
INCOHERENT SCATTERING
IONIZING RADIATIONS
IRON
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
LEAD
LEPTON BEAMS
METALS
MONTE CARLO METHOD
OXYGEN COMPOUNDS
PARTICLE BEAMS
PENETRATION DEPTH
RADIATION EFFECTS
RADIATION SOURCES
RADIATIONS
SCATTERING
TRANSITION ELEMENTS
WATER
360106 -- Metals & Alloys-- Radiation Effects
640301 -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ATOMIC NUMBER
BEAMS
CALCULATION METHODS
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELEMENTS
ENERGY RANGE
GAMMA RADIATION
GAMMA SOURCES
HYDROGEN COMPOUNDS
INCOHERENT SCATTERING
IONIZING RADIATIONS
IRON
KEV RANGE
KEV RANGE 10-100
KEV RANGE 100-1000
LEAD
LEPTON BEAMS
METALS
MONTE CARLO METHOD
OXYGEN COMPOUNDS
PARTICLE BEAMS
PENETRATION DEPTH
RADIATION EFFECTS
RADIATION SOURCES
RADIATIONS
SCATTERING
TRANSITION ELEMENTS
WATER