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Neutron velocity distribution from a superthermal solid 2H2 ultracold neutron source

  • I. Altarev
  • M. DaumEmail author
  • A. Frei
  • E. Gutsmiedl
  • G. Hampel
  • F. J. Hartmann
  • W. Heil
  • A. Knecht
  • J. V. Kratz
  • T. Lauer
  • M. Meier
  • S. Paul
  • U. Schmidt
  • Y. Sobolev
  • N. Wiehl
  • G. Zsigmond
Regular Article — Experimental Physics

Abstract

We have determined for the first time the velocity distribution of neutrons from a solid 2H2 ultracold neutron (UCN) source. The spectrum rises sharply above 4.5m/s and has a maximum around 7m/s after transport in an 8m long guide. The number of neutrons in the UCN velocity range (< 7m/s) may be increased by a factor of two by placing the experiment 1m above the UCN source level.

PACS

29.25.Dz Neutron sources 28.20.Gd Neutron transport: diffusion and moderation 

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • I. Altarev
    • 3
  • M. Daum
    • 4
    Email author
  • A. Frei
    • 3
  • E. Gutsmiedl
    • 3
  • G. Hampel
    • 1
  • F. J. Hartmann
    • 3
  • W. Heil
    • 2
  • A. Knecht
    • 4
    • 6
  • J. V. Kratz
    • 1
  • T. Lauer
    • 1
  • M. Meier
    • 4
  • S. Paul
    • 3
  • U. Schmidt
    • 5
  • Y. Sobolev
    • 1
    • 7
  • N. Wiehl
    • 1
  • G. Zsigmond
    • 4
  1. 1.Institut für KernchemieJohannes Gutenberg-Universität, Fritz-Strassmann-Weg 2MainzGermany
  2. 2.Institut für PhysikJohannes Gutenberg-Universität, Staudingerweg 7MainzGermany
  3. 3.Physik-DepartmentTechnische Universität MünchenGarchingGermany
  4. 4.PSIPaul Scherrer InstitutVilligen PSISwitzerland
  5. 5.Physikalisches InstitutRuprecht-Karls-UniversitätHeidelbergGermany
  6. 6.Physics DepartmentUniversity ZürichZürichSwitzerland
  7. 7.Petersburg Nuclear Physics InstituteGatchinaRussia

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