Systematic study of bremsstrahlung amplitude and a new model for bremsstrahlung calculation

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6161904

Ding, Z M

A general parameterization which enables them to construct all possible approximations to the bremsstrahlung amplitude is applied to explore generalizations of existing soft-photon approximations. They establish the existence of theoretical ambiguity in defining the soft-photon approximations and they show how the bremsstrahlung cross section calculated from a soft-photon amplitude depends on the parameters. They also show that if bremsstrahlung spectrum exhibits resonant structure, then the position of this structure K/sub ..gamma../ and its width Gamma/sub ..gamma../ can be predicted by either performing the detailed bremsstrahlung calculation or using two simple formulas which relate K/sub ..gamma../ and Gamma/sub ..gamma../ directly to the resonant energy E/sub R/ and the width Gamma/sub el/ of the resonant structure observed in the elastic scattering cross sections. They develop and test a new two-energy two-angle approximation for describing bremsstrahlung processes. The natural choice of kinematic variables leads to the situation in which the second term of the amplitude vanishes, B/sub ..mu../ = 0. This approximation provides an excellent description of all the available ..pi../sup +/-/ p..gamma.. and the p/sup 12/C..gamma.. data by means of a single soft-photon approximation.

• Research Organization: City Univ. of New York, NY (USA)
• OSTI ID: 6161904
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
BREMSSTRAHLUNG
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
ELECTROMAGNETIC RADIATION
ENERGY DEPENDENCE
GAMMA SPECTRA
HADRON REACTIONS
HYDROGEN 1 TARGET
INELASTIC SCATTERING
INFORMATION
LEVEL WIDTHS
MATHEMATICAL MODELS
MESON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
PION REACTIONS
PROTON REACTIONS
RADIATIONS
RESONANCE
SCATTERING
SPECTRA
TARGETS
THEORETICAL DATA