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ELECTRON TRIPLET PRODUCTION BY HIGH-ENERGY PHOTONS IN HYDROGEN

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
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The 323-Mev hardened bremsstrahlung beam from the Berkeley synchrotron was used to produce electronpositron pairs and triplets in a 4-in.-dia. liquid hydrogen bubble chamber. It was found that the experimental triplet cross sections for detectable recoils (momentum greater than 0.27 Mev/c) and for recoils with momentum greater than mc rise logarithmically with photon energy to 100 Mev, then level off at approximately 2.8 mb and 1.5 mb, respectively. The total triplet cross section agrees with that of Borsellino above 20-Mev photon energy. No contribution due to exchange terms was found. The positron energy distribution agrees with that of Wheeler and Lamb. The recoil momentum distribution agrees substantially with that of Suh and Bethe Approximately one event due to multiple pair production was expected, but none was found. (auth)
Research Organization:
Univ. of California, Berkeley
NSA Number:
NSA-16-014003
OSTI ID:
4795698
Report Number(s):
UCRL-9390(Rev.); 0031-899X
Journal Information:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 125; ISSN PHRVA
Country of Publication:
United States
Language:
English

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Related Subjects

BERKELEY BEVATRON
BREMSSTRAHLUNG
BUBBLE CHAMBERS
CROSS SECTIONS
ELECTRONS
ENERGY RANGE
HYDROGEN
MEV RANGE
MOMENTUM
PAIR PRODUCTION
PHOTONS
PHOTOPRODUCTION
PHYSICS
POSITRONS
PROTONS
RECOILS
SYNCHROTRONS