Measurements of Ultracold-Neutron Lifetimes in Solid Deuterium

C. L. Morris, J. M. Anaya, T. J. Bowles, B. W. Filippone, P. Geltenbort, R. E. Hill, M. Hino, S. Hoedl, G. E. Hogan, T. M. Ito, T. Kawai, K. Kirch, S. K. Lamoreaux, C. Y. Liu, M. Makela, L. J. Marek, J. W. Martin, R. N. Mortensen, A. Pichlmaier, A. SaundersS. J. Seestrom, D. Smith, W. Teasdale, B. Tipton, M. Utsuro, A. R. Young, J. Yuan

Research output: Contribution to journalArticlepeer-review


We present the first measurements of the survival time of ultracold neutrons (UCNs) in solid deuterium ([Formula presented]). 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 [Formula presented] 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.

Original languageEnglish (US)
JournalPhysical review letters
Issue number27
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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