Progress towards a precision measurement of the neutron lifetime using magnetically trapped ultracold neutrons

P. N. Seo, K. J. Coakley, J. M. Doyle, F. H. Dubose, R. Golub, E. Korobkina, S. K. Lamoreaux, H. P. Mumm, C. M. O'shaughnessy, G. R. Palmquist, A. K. Thompson, G. L. Yang, L. Yang, P. R. Huffman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As part of an on-going program utilizing magnetically trapped ultracold neutrons (UCNs), we are developing a technique that offers the possibility of improving the precision of the neutron lifetime by more than an order of magnitude. The experiment works by loading an Ioffe-type superconducting magnetic trap with UCNs through inelastic scattering of 0.89 nm neutrons with phonons in superfluid 4He. Trapped neutrons are detected when they decay; charged decay electrons ionize helium atoms in the superfluid resulting in scintillation light that is recorded in real time using photomultiplier tubes. At present, we are installing a larger and deeper superconducting magnetic trap into our apparatus, implementing techniques to reduce background events, and working to increase the neutron decay detection efficiency. We report the status of the construction of the improved apparatus.

Original languageEnglish (US)
Title of host publicationPARTICLES AND NUCLEI
Subtitle of host publicationSeventeenth Internatinal Conference on Particles and Nuclei
Pages811-813
Number of pages3
DOIs
StatePublished - Dec 1 2006
EventPARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei - Santa Fe, NM, United States
Duration: Oct 23 2005Oct 30 2005

Publication series

NameAIP Conference Proceedings
Volume842
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherPARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei
CountryUnited States
CitySanta Fe, NM
Period10/23/0510/30/05

Keywords

  • Magnetic trap
  • Neutron lifetime
  • Scintillation
  • Superfluid helium
  • Superthermal
  • Ultracold neutron

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Seo, P. N., Coakley, K. J., Doyle, J. M., Dubose, F. H., Golub, R., Korobkina, E., Lamoreaux, S. K., Mumm, H. P., O'shaughnessy, C. M., Palmquist, G. R., Thompson, A. K., Yang, G. L., Yang, L., & Huffman, P. R. (2006). Progress towards a precision measurement of the neutron lifetime using magnetically trapped ultracold neutrons. In PARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei (pp. 811-813). (AIP Conference Proceedings; Vol. 842). https://doi.org/10.1063/1.2220390