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18 April 2024

» arxiv » nucl-ex/0109020

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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. Saunders ; S. J. Seestrom ; D. Smith ; W. Teasdale ; B. Tipton ; M. Utsuro ; A. R. Young ; J. Yuan ;
Date:	27 Sep 2001
Journal:	Phys.Rev.Lett. 89 (2002) 272501
Subject:	nucl-ex
Abstract:	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. Superthermal UCN sources offer orders of magnitude improvement in the available densities of UCNs, and are of great importance to fundamental particle-physics experiments such as searches for a static electric dipole moment and lifetime measurements of the free neutron. 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.
Source:	arXiv, nucl-ex/0109020
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