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Author Titus, W. F.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BEAMS- CESIUM 137- CROSS SECTIONS- ENERGY RANGE- GAMMA RADIATION- GAMMA SOURCES- MEASURED VALUES- PHOTOELECTRIC EFFECT ♦ COMPTON EFFECT- CROSS SECTIONS- ERRORS- MEASURED VALUES- PHOTOELECTRIC EFFECT- SCATTERING ♦ COMPTON EFFECT- CROSS SECTIONS- MEASURED VALUES- PHOTOELECTRIC EFFECT- PULSE ANALYZERS ♦ COPPER- CROSS SECTIONS- GOLD- MEASURED VALUES- MOLYBDENUM- PHOTOELECTRIC EFFECT- SILVER- TANTALUM- TARGETS ♦ COUNTERS- CROSS SECTIONS- DETECTION- ELECTRONS- FOUR-PI COUNTERS- MEASURED VALUES- PHOSPHORS- PHOTOELECTRIC EFFECT- POLYMERS- - SCINTILLATION COUNTERS
Abstract The total photoelectric cross sections of copper, molybdenum, silver, tantalum, and gold were measured at 662 kev. A highly collimated beam of gammas from a Cs-137 source impinged upon a thin disk of a target material. Photoelectrons from a target were detected by a plastic scintillator subtending very nearly 4 pi steradians. Pulse-height analysis permitted partial resolution of photoelectric and Compton events. After subtraction of unresolved Compton events and correction for coherent scattering effects, the cross sections were found to be 0.125 plus or minus 0.009, 0.700 plus or minus 0.016, 1.198 plus or minus 0.028, 8.55 plus or minus 0.14, and 11.62 plus or minus 0.16 barns, respectively, in satisfactory agreement with theory. (auth)
ISSN 0031899X
Educational Use Research
Learning Resource Type Article
Publisher Date 1959-07-15
Publisher Department National Bureau of Standards, Washington, D.C.
Journal Physical Review
Volume Number 115
Organization National Bureau of Standards, Washington, D.C.


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