Abstract:
The first measurement of the 2H(gamma,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 -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 gamma-ray polarization at a lab angle of
150¡ã. The experimentally determined analyzing power
provides a sensitive measurement of the relative E1 and
M1 contributions to the total cross section. (C)2000 The
American Physical Society