First Measurements of Spin-Dependent Double-Differential Cross Sections and the Gerasimov-Drell-Hearn Integrand from H→3e(γ→,n)pp at Incident Photon Energies of 12.8 and 14.7 MeV
Abstract
The first measurement of the three-body photodisintegration of longitudinally polarized He3 with a circularly polarized γ-ray beam was carried out at the High Intensity γ-ray Source facility located at Triangle Universities Nuclear Laboratory. The spin-dependent double-differential cross sections and the contributions from the three-body photodisintegration to the He3 Gerasimov-Drell-Hearn integrand are presented and compared with state-of-the-art three-body calculations at the incident photon energies of 12.8 and 14.7 MeV. The data reveal the importance of including the Coulomb interaction between protons in three-body calculations.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2013
- DOI:
- 10.1103/PhysRevLett.110.202501
- arXiv:
- arXiv:1304.5442
- Bibcode:
- 2013PhRvL.110t2501L
- Keywords:
-
- 25.20.-x;
- 29.25.Pj;
- 67.30.ep;
- Photonuclear reactions;
- Polarized and other targets;
- Spin polarized <sup>3</sup>He;
- Nuclear Experiment
- E-Print:
- 5 pages, 3 figures, accepted in Physical Review Letters