Progress toward a new measurement of the parity violating asymmetry in n+p-->d+gamma

Details Progress toward a new measurement of the parity violating asymmetry in n+p-->d+gamma Progress toward a new measurement of the parity violating asymmetry in n+p-->d+gamma

1998-04-01

arxiv.org/abs/nucl-ex/9804001v1

Nucl.Instrum.Meth. A515 (2003) 563-574

Physics

Nuclear Physics

Nuclear Experiment

19 pages, 9 eps figures, uses RevTeX and epsfig, submitted to NIM

Scientific paper

We outline the motivation and conceptual design for a new experiment aimed at a 10-fold improvement in the accuracy of the parity-violating asymmetry A_gamma in the angular distribution of 2.2 MeV gamma rays from the n+p-->d+gamma reaction. This observable is primarily sensitive to the weak pion-nucleon coupling H_pi^1. A proof-of-principle experiment using unpolarized low-energy neutron capture on polyethylene and an array of 12 CsI detectors operated in current mode has been performed. Results of this test experiment including the current mode signal, electronic noise and detector sensitivity to magnetic fields are reported.

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