Precise tests for the unitarized pion photoproduction impulse amplitude in exclusive nuclear reactions

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6656312

Wittman, R S

An impulse amplitude for pion photoproduction, suitable for the nuclear problem, in constructed with improved background dynamics and unitarity. The superior features of the amplitude are demonstrated at energies between threshold (E/sub ..gamma../ = 150 MeV) and the ..delta..(1232) resonance energy (E/sub ..gamma../ = 320 MeV) by discussing their effects on partial cross sections relevant to exclusive transitions in the 1p-shell. The specific reactions of /sup 13/C(..gamma..,..pi../sup -/)/sup 13/N/sub g.s./ and /sup 14/N(..gamma..,..pi../sup +/)/sup 14/C/sub gs/ are discussed in light of these more general partial cross sections. The nuclear structure of the A = 14 systems helps to enhance the effects considered. At or near resonance, very sizable (20-30%) effects arise both from the unitarity and from the refined treatment of the pionic final state interaction generated in the ..delta..-hole approach. Other examples of charged pion photoproduction reactions for 1p-shell nuclei are discussed briefly. Future theoretical improvements and experimental possibilities are suggested.

• Research Organization: Rensselaer Polytechnic Inst., Troy, NY (USA)
• OSTI ID: 6656312
• Country of Publication: United States
• Language: English

Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
BOSONS
CARBON 13 TARGET
CROSS SECTIONS
DATA
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
HADRONS
IMPULSE APPROXIMATION
INFORMATION
MESONS
MEV RANGE
MEV RANGE 100-1000
NITROGEN 14 TARGET
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RESONANCE
SCATTERING AMPLITUDES
TARGETS
THEORETICAL DATA