A low momentum tagged antineutron beam

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Abstract

The operating performances of a low-momentum (< 270 MeV/c) tagged n beam are reported. The n beam is obtained by means of the charge exchange reaction pp → nn on a liquid hydrogen target. The neutron associated to the n in the two-body reaction is used for the determination of the n energy and direction. The measured total rate of tagged n is 8.02 ± 0.03 × 10−5 per incident p at 300 MeV/c.

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