First measurement of the near-threshold 2
,n)p analyzing power using a free-electron laser based γ-ray source
The first measurement of the 2H(γ→,n)p analyzing power near threshold has been performed using the High-Intensity Gamma-ray Source (HIGS) at the Duke Free-Electron Laser Laboratory. A 3.58 MeV γ-ray beam having an energy resolution of 2.5% and 100% linear polarization was incident on an active C6D12 target. Outgoing neutrons were detected parallel and perpendicular to the plane of γ-ray polarization at a lab angle of 150°. The experimentally determined analyzing power provides a sensitive measurement of the relative E1 and M1 contributions to the total cross section.
Schreiber, EC; Canon, RS; Crowley, BT; Howell, CR; Kelley, JH; Litvinenko, VN; Nelson, SO; Park, SH; Pinayev, IV; Prior, RM; Sabourov, K; Spraker, M; Tornow, W; Wu, Y; Wulf, EA; Weller, HR
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