First observation of trapped high-field seeking ultracold neutron spin states

M. Daum, P. Fierlinger, B. Franke, P. Geltenbort, L. Goeltl, E. Gutsmiedl, J. Karch, G. Kessler, K. Kirch, H. C. Koch, A. Kraft, T. Lauer, B. Lauss, E. Pierre, G. Pignol, D. Reggiani, P. Schmidt-Wellenburg, Y. Sobolev, T. Zechlau, G. Zsigmond

Research output: Contribution to journalArticlepeer-review

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Ultracold neutrons were stored in a volume, using a magnetic dipole field shutter. Radial confinement was provided by material walls. Low-field seeking neutrons were axially confined above the magnetic field. High-field seeking neutrons are trapped inside the magnetic field. They can systematically shift the measured neutron lifetime to lower values in experiments with magnetic confinement.

Original languageEnglish
Pages (from-to)456-460
Number of pages5
JournalPhysics Letters B
Issue number5
StatePublished - 25 Oct 2011


  • Neutron lifetime
  • Ultracold neutron storage
  • Ultracold neutrons


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