Author/Authors :
Huffman، نويسنده , , P.R and Brome، نويسنده , , C.R and Butterworth، نويسنده , , J.S and Coakley، نويسنده , , K.J. and Dewey، نويسنده , , M.S and Dzhosyuk، نويسنده , , S.N and Gilliam، نويسنده , , D.M and Golub، نويسنده , , R and Greene، نويسنده , , G.L and Habicht، نويسنده , , K and Lamoreaux، نويسنده , , S.K and Mattoni، نويسنده , , C.E.H and McKinsey، نويسنده , , D.N and Wietfeldt، نويسنده , , F.E and Doyle، نويسنده , , J.M، نويسنده ,
Abstract :
We report progress towards magnetic trapping of ultra-cold neutrons (UCN) in preparation for a neutron lifetime measurement. UCN will be produced by inelastic scattering of cold (0.89 nm) neutrons in a reservoir of superfluid 4He and confined in a three-dimensional magnetic trap. As the trapped neutrons decay, recoil electrons will generate scintillations in the liquid He, which should be detectable with nearly 100% efficiency. This direct measure of the number of UCN decays vs. time can be used to determine the neutron beta-decay lifetime.
Keywords :
beta decay , liquid helium , magnetic trap , Ultra-cold neutrons , Scintillation , Superthermal , Extreme ultraviolet , Neutron Lifetime , Weak force
