Calculation of the ultracold neutron upscattering rate from para-deuterium bound in a lattice
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The ultracold neutron (UCN) upscattering rate from para-deuterium contaminated solid deuterium near T=0K is calculated and found to be 4 msec for a room-temperature-equilibrium concentration. The para-deuterium contamination appears to be responsible for the apparent loss of UCN in the Los Alamos spallation-driven UCN source.
4 pages; new version has expanded author list and minor grammatical corrections Yikes. one more error-in introduction, forgot to say that the thin film source was discovered when the superfluid source was empty of 4He, and UCN observed. An important point. One more minor change in labelling ortho/para states
4 pages; new version has expanded author list and minor grammatical corrections Yikes. one more error-in introduction, forgot to say that the thin film source was discovered when the superfluid source was empty of 4He, and UCN observed. An important point. One more minor change in labelling ortho/para states