Differential cross section for the reaction 2H(γ, p)n from 133 to 158 MeV

doi:10.1016/0375-9474(91)90600-B

Nuclear Physics A

Volume 532, Issues 3–4, 7 October 1991, Pages 617-633

https://doi.org/10.1016/0375-9474(91)90600-B Get rights and content

Abstract

The cross section for the reaction ²H(γ, p)n has been measured at laboratory photon energies E_γ = 133−158 MeV and c.m. angles between 30° and 150°. The reaction was induced by a tagged bremsstrahlung photon beam incident on a liquid deuterium target. The uncertainty in the absolute cross sections is ⩽ 5%. There is now reasonable agreement between recent measurements in this energy region and the overall data set now defines the cross section sufficiently well to provide a test of current models of the reaction.

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A fit to deuteron photodisintegration data up to 200 MeV using the Nijmegen 1993 potential
1996, Nuclear Physics A
We use our model of deuteron photodisintegration to calculate the reaction observables and to compare the theoretical results with the experimental data up to 200 MeV photon lab energy. The 1993 version of the Nijmegen potential is used to calculate the deuteron and continuum wavefunctions, and the parameters which control the 1πE, Δ and 1pE contributions are fixed at values obtained earlier by fitting a selected set of cross section data. The data for the forward and backward cross sections and for the total cross section are fitted very well, as are the data for polarisation observables. Difficulties remain with the differential cross section data between 80 and 200 MeV, but these may result from the poor quality of the data. New measurements are urgently needed in this energy region.
Two-body photodisintegration of the deuteron from 100 to 800 MeV
1996, Nuclear Physics A
The total and the differential cross sections for the D(γ,p)n reaction have been measured over the photon energy range 100-800 MeV at the 855 MeV MAMI Microtron in Mainz. Using the large acceptance detector DAPHNE in conjunction with the Glasgow tagging spectrometer, high precision results with small systematic errors were obtained. The data are presented in the form of thirty-five angular distributions at c.m. proton angles between 30°–160° in 10° intervals and at photon energies in steps of 20 MeV. Previous experimental work is reassessed in the light of the present results and comparison with some recent theoretical calculations.
Deuteron photodisintegration up to 200 MeV: (I). The theoretical model
1993, Nuclear Physics, Section A
We develop a theoretical model for deuteron photodisintegration by exploiting the identity connecting the matrix elements of the divergence of the internal-convection current density, the charge density for the nonrelativistic impulse approximation and the potential used to calculate the wavefunctions. This identity leads to a good approximation scheme for calculating the electric multipole amplitudes, which enables one-pion exchange to be treated consistently for both the electric and magnetic amplitudes. Full details are given of all the contributions to the multipole amplitudes which are taken into account in calculating the reaction observables.
Deuteron photodisintegration up to 200 MeV: (II). Comparison with experimental data
1993, Nuclear Physics, Section A
We use the model of deuteron photodisintegration presented in the previous paper to calculate the reaction observables and to compare theory and experiment up to 200 MeV lab photon energy. We describe how the parameters which control the 1πE, Δ and 1ϱE contributions are fixed by means of a best fit to selected experimental data. We show that the data on the forward cross section cannot be fitted using the parametrised Paris and Moscow potentials. Using one of the versions of the Bonn coordinate-space potential, we obtain a rather satisfactory global fit to the whole body of data up to 200 MeV. The result is a conceptually simple picture of the reaction in this energy range, in which the calculated observables are completely dominated by the impulse approximation, 1πE in leading order and the contributions of Δ and 1ϱE to the M⁽¹⁾ amplitudes with a singlet final state.
Quasideuteron effect with a polarized γ<sup>→</sup>-ray beam
1996, Physical Review C - Nuclear Physics
H2(,p)n cross section between 20 and 440 MeV
1994, Physical Review C

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¹: Present address: C.E.N. Saclay, DPhN/SEPN, 91191 Gif sur Yvette Cedex, France.

²: Present address: Saskatchewan Accelerator Laboratory, University of Saskatchewan, Saskatoon, Canada.

³: Present address: Physikalisches Institut der Universität Bonn, D-5300 Bonn 1, Germany.

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Differential cross section for the reaction 2H(γ, p)n from 133 to 158 MeV

Abstract

Nucl. Instr. Meth.

Nucl. Instr. Meth.

Nucl. Instr. Meth.

Nucl. Phys.

Sov. Phys. JETP

Can. J. Phys.

Phys. Reports

Phys. Rev.

Few-Body Systems

Phys. Rev.

Phys. Rev.

Differential cross section for the reaction ²H(γ, p)n from 133 to 158 MeV