Phys. Rev. Lett. 89, 272501 (2002) [4 pages]Measurements of Ultracold-Neutron Lifetimes in Solid DeuteriumReceived 26 September 2001; revised 3 September 2002; published 18 December 2002 We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium (SD2). This critical parameter provides a fundamental limitation to the effectiveness of superthermal UCN sources that utilize solid ortho-deuterium as the source material. These measurements are performed utilizing a SD2 source coupled to a spallation source of neutrons, providing a demonstration of UCN production in this geometry and permitting systematic studies of the influence of thermal up-scatter and contamination with para-deuterium on the UCN survival time. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.272501
DOI:
10.1103/PhysRevLett.89.272501
PACS:
28.20.Gd, 14.20.Dh, 21.10.Tg, 29.25.Dz
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