3He(γ,pp)n cross sections with tagged photons below the Δ resonance energy
Abstract
Cross sections have been measured for the 3He(γ,pp)n reaction with tagged photons in the range Eγ =161-208 MeV using the Saskatchewan-Alberta Large Acceptance Detector (SALAD). The protons were detected over a range of polar angles of 40°-140° and azimuthal angles of 0°-360° with an energy threshold of 40 MeV. Comparisons are made with a microscopic calculation which includes one-, two-, and three-nucleon absorption mechanisms. One- and two-nucleon processes, including final-state interactions, are unable to account for the measured cross sections. The addition of three-nucleon absorption diagrams gives roughly the right strength, but the distribution in phase space is in disagreement with the data.
- Publication:
-
Physical Review C
- Pub Date:
- November 1996
- DOI:
- 10.1103/PhysRevC.54.2175
- Bibcode:
- 1996PhRvC..54.2175K
- Keywords:
-
- 25.10.+s;
- 25.20.-x;
- Nuclear reactions involving few-nucleon systems;
- Photonuclear reactions