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Photon-absorption cross sections between 3 and 30 MeV

Journal Article · · Phys. Rev., C; (United States)
; ;
Photon absorption by Al, Ta, and Bi between 3 and 30 MeV was measured using as a photon spectrometer a photoneutron time-of-flight detector and a liquid deuterium target. The atomic cross sections of Ta and Bi at the lowest energies (and of Al at higher energies) agree with calculated values appearing in published tabulations but exceed them at 25 MeV by about 2% in Ta and 3% in Bi. Calculations by others using empirical Coulomb corrections and improved screening corrections to the cross section for pair production by the nucleus agree with experiment to within (0.5 +- 0.4)%. Best experimental values of the combined correction for Bi are given.
Research Organization:
Division of Physics, National Research Council, Ottawa, Ontario K1A OR6, Canada
OSTI ID:
5447309
Journal Information:
Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 21:6; ISSN PRVCA
Country of Publication:
United States
Language:
English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
ALUMINIUM 27 TARGET
BINDING ENERGY
BISMUTH 209 TARGET
CORRECTIONS
COULOMB CORRECTION
CROSS SECTIONS
DEUTERIUM TARGET
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
ENERGY RANGE
FERMIONS
GAMMA SPECTRA
GIANT RESONANCE
INTERACTIONS
LEPTONS
MEASURING INSTRUMENTS
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NUCLEAR REACTIONS
PAIR PRODUCTION
PHOTONUCLEAR REACTIONS
RESONANCE
SPECTRA
SPECTROMETERS
TANTALUM 181 TARGET
TARGETS
TIME-OF-FLIGHT SPECTROMETERS
TOTAL CROSS SECTIONS