The 4He(gamma,2N) reaction measured with tagged photons

Doran, S.M. et al. (1993) The 4He(gamma,2N) reaction measured with tagged photons. Nuclear Physics A, 559(3), pp. 347-367. (doi:10.1016/0375-9474(93)90158-T)

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Abstract

The results of tagged-photon measurements of the 4He(γ, pn)d, 4He(γ, pn)pn and 4He(γ, pp)nn reactions, carried out with photons of energies 80–131 MeV, are presented. The (γ, pn)d three-body-breakup cross section dominates the four-body-breakup cross section. The three-body-breakup cross section and the corresponding deuteron recoil-momentum spectrum are reasonably accounted for by a mechanism of photon absorption on correlated proton-neutron pairs. In contrast the four-body-breakup mechanism appears to have two components: absorption on correlated proton-neutron pairs and a more complex additional component which has a distribution similar to phase space. The data rule out substantial photon absorption on proton-proton pairs.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:McGeorge, Dr John and Owens, Professor Robert and MacGregor, Professor I and Anthony, Dr Ian and Annand, Dr John and Kellie, Dr James
Authors: Doran, S.M., MacGregor, I.J.D., Annand, J.R.M., Anthony, I., Dancer, S.N., Hall, S.J., Kellie, J.D., McGeorge, J.C., Miller, G.J., Owens, R.O., Wallace, P.A., Schoch, B., Schmieden, H., and Klein, S.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Physics A
ISSN:0375-9474
ISSN (Online):1873-1554
Copyright Holders:Elsevier Science Publishers BV

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