The reaction He-4(<(gamma)over right arrow>,pi(0))He-4 has been studied with the LEGS tagged, polarized gamma-ray beam, Data are presented at laboratory angles of 31 degrees, 45 degrees, 72.5 degrees, 90 degrees, 110 degrees and 130 degrees for incoming photon energies of 206, 219, 232, 245, 259, 274, 289, 306 and 322 MeV. The unpolarized cross sections are compared with the Delta-hole theoretical model results available in literature. The measured photon beam asymmetry is -1 as expected from conservation of angular momentum and parity. (C) 1999 Published by Elsevier Science B.V.
Coherent pi(0) photo-production on He-4 at intermediate energies with polarized photons
BELLINI, Vincenzo;
1999-01-01
Abstract
The reaction He-4(<(gamma)over right arrow>,pi(0))He-4 has been studied with the LEGS tagged, polarized gamma-ray beam, Data are presented at laboratory angles of 31 degrees, 45 degrees, 72.5 degrees, 90 degrees, 110 degrees and 130 degrees for incoming photon energies of 206, 219, 232, 245, 259, 274, 289, 306 and 322 MeV. The unpolarized cross sections are compared with the Delta-hole theoretical model results available in literature. The measured photon beam asymmetry is -1 as expected from conservation of angular momentum and parity. (C) 1999 Published by Elsevier Science B.V.File in questo prodotto:
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