Beta scattering and beta back-scattering from a thin target
Thesis/Dissertation
·
OSTI ID:7042047
An experimental and theoretical technique is presented to determine the distribution of transmitted and back scattered beta particles as a function of angle of incident radiation on a target. Scatterers used consisted of metallic foils of various thicknesses and atomic number, such as Al, Zn, Fe, Ag, and Zr. Three pure beta-emitting radionuclides, [sup 32]P, [sup 204]Tl, and [sup 147]Pm characterized by end-point energies of 1.71 Mev, 0.769 Mev, and 0.225 Mev, respectively, were prepared as individual sources and used in the experimental work. A scintillation detector used in conjunction with the target scatterer and a specially designed fixture that allowed rotation about its vertical rotation axis provided the proper geometry and shielding for this experiment. Finally, the author attempted to compare experimental results with computer calculations and derived an algebraic equation to predict the intensity of beta particle back-scattered radiation as a function of energy of the source material, the scattering angle, scatterer thickness, and the material of the target scatterer. Unlike the case of heavy charged particles such as alpha particles, the effects of beta particle back scattering on dose calculations cannot be ignored. Scattering effects also have important implications with respect to the measurement of beta-emitting radionuclides and the measurements of beta radiation dose.
- Research Organization:
- Massachusetts Univ., Lowell, MA (United States)
- OSTI ID:
- 7042047
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
663420* -- Lepton-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BACKSCATTERING
BETA DECAY RADIOISOTOPES
BETA PARTICLES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
HEAVY NUCLEI
INCIDENCE ANGLE
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHOSPHORUS 32
PHOSPHORUS ISOTOPES
PROMETHIUM 147
PROMETHIUM ISOTOPES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCATTERING
TARGETS
THALLIUM 204
THALLIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BACKSCATTERING
BETA DECAY RADIOISOTOPES
BETA PARTICLES
BETA-MINUS DECAY RADIOISOTOPES
CHARGED PARTICLES
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
HEAVY NUCLEI
INCIDENCE ANGLE
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PHOSPHORUS 32
PHOSPHORUS ISOTOPES
PROMETHIUM 147
PROMETHIUM ISOTOPES
RADIOISOTOPES
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SCATTERING
TARGETS
THALLIUM 204
THALLIUM ISOTOPES
YEARS LIVING RADIOISOTOPES