Threshold. pi. /sup 0/ photoproduction from complex nuclear targets

Journal Article · Fri Jul 01 04:00:00 EDT 1977 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.16.292· OSTI ID:7316187

Vergados, J D; Woloshyn, R M

The photoproduction of neutral pions near threshold from complex nuclear targets is investigated. Momentum dependent terms in the photoproduction operator and a two-nucleon charge exchange production mechanism are included. Various selection rules related to the quantum numbers of the nuclear states involved are discussed. Differential cross sections for pion energies <7.5 MeV from /sup 4/He and /sup 6/Li are calculated using realistic shell model wave functions. The effects of distortion of the pion wave function are found to be small, but the two-nucleon charge exchange mechanism is found to dominate the coherent production from J not = 0 targets near threshold.

• Research Organization: Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19174
• OSTI ID: 7316187
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 16:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
BOSONS
CHARGE-EXCHANGE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY
ENERGY LEVELS
FUNCTIONS
HADRONS
HELIUM 4 TARGET
INTERACTIONS
LITHIUM 6 TARGET
MATHEMATICAL MODELS
MESONS
NUCLEAR MODELS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
QUANTUM NUMBERS
SHELL MODELS
TARGETS
THRESHOLD ENERGY
WAVE FUNCTIONS