Monday, April 22, 2013

1304.5442 (G. Laskaris et al.)

First Measurements of Spin-Dependent Double-Differential Cross Sections
and the GDH Integrand from \vec{^3He}(\vecγ,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
The first measurement of the three-body photodisintegration of longitudinally-polarized ^3He with a circularly-polarized \gamma-ray beam was carried out at the High Intensity \gamma-ray Source (HI\gamma S) facility located at Triangle Universities Nuclear Laboratory (TUNL). The spin-dependent double-differential cross sections and the contributions from the three-body photodisintegration to the ^3He GDH 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.
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