Author/Authors :
G.R. Massoumi، نويسنده , , W.N. Lennard، نويسنده , , Peter J. Schultz، نويسنده , , T.A. Porcelli، نويسنده , , P.J. Simpson، نويسنده ,
Abstract :
A modified cooled source-moderator design using solid Ar moderation to produce monoenergetic positron beams is described. The decay rate over long periods is observed to be ∼0.1% per hour. Results from angular energy loss distributions in a 63 μg/cm2 thick Al target for incident 20 keV positrons using a high-resolution energy analyzer are presented.
