Coherent. pi. /sup 0/ photoproduction on /sup 4/He using 290 MeV photons
Thesis/Dissertation
·
OSTI ID:6044194
The differential cross-sections have been measured for the /sup 4/He(..gamma..,..pi../sup 0/)/sup 4/He reaction using photons of average energy E/sub ..gamma../ = 290 MeV at the MIT-Bates Linear Accelerator Center. The photons were produced by bremsstrahlung from monoenergetic electrons. Measurements were made at laboratory angles of 25, 40, 60, 70, and 80/sup 0/, by detecting the two photons from the decay of the ..pi../sup 0/. Since the ..pi../sup 0/ is measured directly, the first forward angle measurements of the differential cross-sections for coherent ..pi../sup 0/ photoproduction on /sup 4/He were obtained. Comparisons are made to previous data and to calculations in the Distorted Wave Impulse Approximation (DWIA) and in the isobar-hole formalism. The good agreement between the present data and the prediction based upon the isobar-hole theory serves as an important test of this formalism.
- Research Organization:
- Boston Univ., MA (USA)
- OSTI ID:
- 6044194
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
HADRONS
HELIUM 4 TARGET
IMPULSE APPROXIMATION
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
TARGETS
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BASIC INTERACTIONS
BOSONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTORTED WAVE THEORY
DISTRIBUTION
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
HADRONS
HELIUM 4 TARGET
IMPULSE APPROXIMATION
INFORMATION
INTERACTIONS
MATHEMATICAL MODELS
MESONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR MODELS
NUCLEAR REACTIONS
NUMERICAL DATA
PARTICLE PRODUCTION
PHOTONUCLEAR REACTIONS
PHOTOPRODUCTION
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
TARGETS