Nucleon-nucleon Bremsstrahlung: off-energy-shell effects and meson-exchange currents

Conference · Tue Dec 10 04:00:00 EST 1991 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:7105840

Brown, V R ^[1]

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1. Lawrence Livermore National Lab, Box 808 Livermore, California 94550 (United States)

Nucleon-nucleon bremsstrahlung, NN{gamma}, is fundamental process, which involves the strong and electromagnetic fields acting simultaneously. Since the electromagnetic interaction is well known, NN{gamma} provides a calculable tool for comparing off-energy-shell (OES) effects from different two-nucleon potentials compared to experiment and also provides a simple testing ground, which is sensitive to meson-exchange-current (MEC) contributions that are so important in electronuclear physics. MEC effects, which are included by requiring gauge invariance of the complete np{gamma} amplitude and which increase the cross section by a factor greater than two, are shown to order K{degree} in the photon momentum at 200 MeV. pp{gamma} calculations are compared to the 280 MeV experimental results from TRIUMF, which use a polarized proton beam, and which contain large'' OES effects. Potentials with different short-range radial behavior are compared in order to examine the penetration of the photon radiation. Rather good agreement with experiment for the Bonn potential is achieved without the arbitrary normalization of 2/3 applied to the TRIUMF cross-section data. The rescattering included in our work accounts for an increase of up to approximately 20% in the cross section, and it contributes up to a factor of 2.5 in the analyzing power.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7105840
• Report Number(s): CONF-9101100--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 242:1
• Country of Publication: United States
• Language: English

Related Subjects

663430* -- Nucleon-Induced Reactions & Scattering-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
BARYON-BARYON INTERACTIONS
BREMSSTRAHLUNG
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTROMAGNETIC FIELDS
ELECTROMAGNETIC RADIATION
ENERGY RANGE
HADRON-HADRON INTERACTIONS
INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
POTENTIALS
RADIATIONS
RESCATTERING
SCATTERING