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Selected Works of Robert W. Pattie Jr.
Article
Measurement of Spin-Flip Probabilities for Ultracold Neutrons Interacting with Nickel Phosphorus Coated Surfaces
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment (2016)
  • Zhaowen Tang, Los Alamos National Laboratory
  • Evan Robert Adamek, Indiana University Bloomington
  • Aaron Brandt, North Carolina State University
  • Nathan Brannan Callahan, Indiana University Bloomington
  • Steven M. Clayton, Los Alamos National Laboratory
  • Scott Allister Currie, Los Alamos National Laboratory
  • Takeyasu M. Ito, Los Alamos National Laboratory
  • Mark F. Makela, Los Alamos National Laboratory
  • Yasuhiro Masuda, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
  • Christopher L. Morris, Los Alamos National Laboratory
  • Robert Wayne Pattie, Los Alamos National Laboratory
  • John Clinton Ramsey, Los Alamos National Laboratory
  • Daniel J. Salvat, Indiana University Bloomington
  • Daniel J. Salvat, Los Alamos National Laboratory
  • Alexander Saunders, Los Alamos National Laboratory
  • Albert R. Young, North Carolina State University
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Abstract
We report a measurement of the spin-flip probabilities for ultracold neutrons interacting with surfaces coated with nickel phosphorus. For 50 μm thick nickel phosphorus coated on stainless steel, the spin-flip probability per bounce was found to be βNiPonSS=(3.3−5.6+1.8)×10−6. For 50 μm thick nickel phosphorus coated on aluminum, the spin-flip probability per bounce was found to be βNiPonAl=(3.6−5.9+2.1)×10−6. For the copper guide used as reference, the spin flip probability per bounce was found to be βCu=(6.7−2.5+5.0)×10−6. The results on the nickel phosphorus-coated surfaces may be interpreted as upper limits, yielding βNiPonSS<6.2×10−6 (90% C.L.) and βNiPonAl<7.0×10−6 (90% C.L.) for 50 μm thick nickel phosphorus coated on stainless steel and 50 μm thick nickel phosphorus coated on aluminum, respectively. Nickel phosphorus coated stainless steel or aluminum provides a solution when low-cost, mechanically robust, and non-depolarizing UCN guides with a high Fermi potential are needed.
Keywords
  • Measurement,
  • Spin-Flip,
  • Probabilities,
  • Ultracold Neutrons,
  • Nickel Phosphorus Coated Surfaces
Disciplines
Publication Date
August 11, 2016
DOI
10.1016/j.nima.2016.04.098
Publisher Statement
This document is an author manuscript from arXiv. The publisher's final edited version of this article is available at Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment.
Citation Information
Zhaowen Tang, Evan Robert Adamek, Aaron Brandt, Nathan Brannan Callahan, et al.. "Measurement of Spin-Flip Probabilities for Ultracold Neutrons Interacting with Nickel Phosphorus Coated Surfaces" Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Vol. 827 (2016) p. 32 - 38 ISSN: 0168-9002
Available at: http://works.bepress.com/robert-pattie/18/