Calculation of pair production by 10 and 20 MeV photons

Journal Article · Sat Aug 01 04:00:00 EDT 1987 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.36.562· OSTI ID:6461685

Wright, L E; Sud, K K; Kosik, D W

We present new techniques for calculating electron-positron pair production in the field of a fixed point charge in distorted-wave Born approximation which permits the evaluation of the Dirac-Coulomb radial matrix elements for lepton energies much greater than the electron rest mass, and for large angular momenta. Using these techniques, the pair production cross sections for 10 and 20 MeV photons on uranium (Z = 92) are evaluated and compared to the so-called ''bridging formulae'' which connect the low energy (..omega..<5 MeV) distorted-wave Born approximation results to the approximate results for high energy (..omega..>50 MeV) obtained with the Sommerfeld-Maue approximation and to the experimental results.

• Research Organization: Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701
• OSTI ID: 6461685
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions &amp; Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
ANGULAR MOMENTUM
BORN APPROXIMATION
CAPTURE
CHARGE DISTRIBUTION
COULOMB FIELD
CROSS SECTIONS
DIFFERENTIAL EQUATIONS
DIRAC EQUATION
DWBA
ELECTRIC FIELDS
ELECTRON PAIRS
ELEMENTS
ENERGY RANGE
EQUATIONS
INTERACTIONS
MATRIX ELEMENTS
METALS
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
PAIR PRODUCTION
PARTIAL DIFFERENTIAL EQUATIONS
PHOTONUCLEAR REACTIONS
URANIUM
WAVE EQUATIONS