Multipole analysis of {sup 2}H({gamma},p)n in the {Delta} resonance region
- Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208 (United States)
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
An energy-dependent multipole analysis of the photodisintegration of deuterium has been performed for photon energies between 187 and 314 MeV using recent data taken with linearly polarized photons. A good fit is obtained with 11 free parameters determining eight multipoles. A wide variety of multipole solutions has been examined and in all cases the cross section with photon polarization parallel to the reaction plane is dominated by electric transitions, with E2{bold {center_dot}}E1 interference responsible for the observed forward-backward angular asymmetry. The cross sections observed in perpendicular kinematics are dominated by magnetic multipoles. Several recent N{Delta}/NN coupled-channel calculations have predicted a pronounced 90{degree} dip in the cross section that is absent from the data. This dip can be reproduced by changing the M2 strength distribution in our fit. A comparison is made with multipoles calculated by Wilhelm and Arenh{umlt o}vel at 300 MeV. {copyright} {ital 1998} {ital The American Physical Society}
- OSTI ID:
- 638823
- Journal Information:
- Physical Review, C, Vol. 58, Issue 1; Other Information: PBD: Jul 1998
- Country of Publication:
- United States
- Language:
- English
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