Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 1 of 1
Full-Text Articles in Physics
A Multilayer Surface Detector For Ultracold Neutrons
A Multilayer Surface Detector For Ultracold Neutrons
Robert W. Pattie Jr.
A multilayer surface detector for ultracold neutrons (UCNs) is described. The top 10B layer is exposed to the vacuum chamber and directly captures UCNs. The ZnS:Ag layer beneath the 10B layer is a few microns thick, which is sufficient to detect the charged particles from the 10B(n,α)7Li neutron-capture reaction, while thin enough so that ample light due to α and 7Li escapes for detection by photomultiplier tubes. One-hundred-nm thick 10B layer gives high UCN detection efficiency, as determined by the mean UCN kinetic energy, detector materials and others. Low background, including …