First measurements of spin-dependent double-differential cross sections and the Gerasimov-Drell-Hearn Integrand from 3He(γ,n)pp at incident photon energies of 12.8 and 14.7 MeV

G Laskaris; Q Ye; B Lalremruata; Q J Ye; M W Ahmed; T Averett; A Deltuva; D Dutta; A C Fonseca; H Gao; J Golak; M Huang; H J Karwowski; J M Mueller; L S Myers; C Peng; B A Perdue; X Qian; P U Sauer; R Skibiński; S Stave; J R Tompkins; H R Weller; H Witała; Y K Wu; Y Zhang; W Zheng

doi:10.1103/PhysRevLett.110.202501

First measurements of spin-dependent double-differential cross sections and the Gerasimov-Drell-Hearn Integrand from 3He(γ,n)pp at incident photon energies of 12.8 and 14.7 MeV

Phys Rev Lett. 2013 May 17;110(20):202501. doi: 10.1103/PhysRevLett.110.202501. Epub 2013 May 17.

Authors

G Laskaris¹, Q Ye¹, B Lalremruata¹, Q J Ye¹, M W Ahmed², T Averett³, A Deltuva⁴, D Dutta⁵, A C Fonseca⁴, H Gao¹, J Golak⁶, M Huang¹, H J Karwowski⁷, J M Mueller¹, L S Myers¹, C Peng¹, B A Perdue¹, X Qian¹, P U Sauer⁸, R Skibiński⁶, S Stave¹, J R Tompkins⁷, H R Weller¹, H Witała⁶, Y K Wu¹, Y Zhang¹, W Zheng¹

Affiliations

¹ Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA and Department of Physics, Duke University, Durham, North Carolina 27708, USA.
² Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA and Department of Physics, Duke University, Durham, North Carolina 27708, USA and Department of Mathematics and Physics, North Carolina Central University, Durham, North Carolina 27707, USA.
³ College of William and Mary, Williamsburg, Virginia 23187, USA.
⁴ Centro de Física Nuclear da Universidade de Lisboa, P-1649-003 Lisboa, Portugal.
⁵ Mississippi State University, Mississippi State, Mississippi 39762, USA.
⁶ M. Smoluchowski Institute of Physics, Jagiellonian University, PL-30059 Kraków, Poland.
⁷ Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA and Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, USA.
⁸ Institut für Theoretische Physik, Leibniz Universität Hannover, D-30167 Hannover, Germany.

PMID: 25167400
DOI: 10.1103/PhysRevLett.110.202501

Abstract

The first measurement of the three-body photodisintegration of longitudinally polarized (3)He 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 (3)He 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.