Cross sections for the reaction /sup 4/He(. gamma. ,. gamma. ) /sup 4/He in the. delta. (1232)-resonance region

Journal Article · Mon Oct 24 04:00:00 EDT 1988 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.61.1922· OSTI ID:6762089

Austin, E J; Booth, E C; Delli Carpini, D; Gall, K P; McIntyre, E K; Miller, J P; Warner, D; Whitehouse, D A; Dodson, G

We have measured the differential cross sections for coherent Compton photon scattering in the reaction /sup 4/He(..gamma..,..gamma..) /sup 4/He at laboratory angles of 24/sup 0/, 30/sup 0/, 45/sup 0/, and 60/sup 0/ with an average laboratory photon energy of 320 MeV, at 22/sup 0/ with 358 MeV, and at 30/sup 0/ with 260 MeV. These measurements are the first unambiguous test of the ..delta..-hole formalism for this reaction near the peak of the cross section for the ..delta.. resonance. The results are compared to theoretical calculations in the isobar-hole model. Agreement is good for data at the energy corresponding to the ..delta.. peak.

• Research Organization: Physics Department, Boston University, Boston, Massachusetts 02215
• OSTI ID: 6762089
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:17; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

651220* -- Nuclear Properties & Reactions
A=1-5
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BASIC INTERACTIONS
COMPTON EFFECT
CROSS SECTIONS
DATA
DELTA BARYONS
DELTA-1232 BARYONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GAMMA SPECTRA
HADRONS
HELIUM 4 TARGET
INFORMATION
INTERACTIONS
MEV RANGE
MEV RANGE 100-1000
N BARYONS
NUCLEAR REACTIONS
NUMERICAL DATA
PHOTONUCLEAR REACTIONS
SCATTERING
SPECTRA
TARGETS