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

Technical Report · Tue Jul 01 04:00:00 EDT 1986

OSTI ID:6992954

Wittman, R

An impulse amplitude for pion photoproduction, suitable for the nuclear problem, is 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 g.s./ are discussed in light of these more general partial cross sections. The nuclear structure of the A = 14 system helps to enhance the effects considered. At or near resonance, very sizable (20 to 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. 61 refs., 58 figs.

• Research Organization: Rensselaer Polytechnic Inst., Troy, NY (USA)
• DOE Contract Number: AC02-83ER40114
• OSTI ID: 6992954
• Report Number(s): DOE/ER/40114-T3; ON: DE87003924
• Country of Publication: United States
• Language: English

Related Subjects

653001 -- Nuclear Theory-- Nuclear Structure
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653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANGULAR DISTRIBUTION
BARYON RESONANCES
BARYONS
BASIC INTERACTIONS
BERYLLIUM 10
BERYLLIUM ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON 10 TARGET
BORON 12
BORON 13
BORON ISOTOPES
BOSONS
CARBON 12 TARGET
CARBON 13 TARGET
CARBON 14
CARBON ISOTOPES
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
HELIUM 6
HELIUM ISOTOPES
INFORMATION
INTERACTIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
LITHIUM 6 TARGET
MESONS
MINUTES LIVING RADIOISOTOPES
N RESONANCES
NITROGEN 13
NITROGEN 14 TARGET
NITROGEN ISOTOPES
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
PIONS MINUS
PIONS PLUS
PSEUDOSCALAR MESONS
RADIOISOTOPES
REACTION KINETICS
RESONANCE PARTICLES
SECONDS LIVING RADIOISOTOPES
TARGETS
THEORETICAL DATA
UNITARITY
YEARS LIVING RADIOISOTOPES