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Measurement of the Neutron Lifetime Using a Proton Trap
Physical Review Letters
We report a new measurement of the neutron decay lifetime by the absolute counting of in-beam neutrons and their decay protons. Protons were confined in a quasi-Penning trap and counted with a silicon detector. The neutron beam fluence was measured by capture in a thin 6LiF foil detector with known absolute efficiency. The combination of these simultaneous measurements gives the neutron lifetime: tau_n = 886.8 +/- 1.2[stat] +/- 3.2[sys] seconds. The systematic uncertainty is dominated bydoi:10.1103/physrevlett.91.152302 pmid:14611461 fatcat:rmob5heutjhjvpxrx37xmuqyl4