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Title: High-sensitivity measurement of He 3 - He 4 isotopic ratios for ultracold neutron experiments

Abstract

Research efforts ranging from studies of solid helium to searches for a neutron electric dipole moment require isotopically purified helium with a ratio of 3 He to 4 He at levels below that which can be measured using traditional mass spectroscopy techniques. We demonstrate an approach to such a measurement using accelerator mass spectroscopy, reaching the 10 - 14 level of sensitivity, several orders of magnitude more sensitive than other techniques. Measurements of 3 He / 4 He in samples relevant to the measurement of the neutron lifetime indicate the need for substantial corrections. We also argue that there is a clear path forward to sensitivity increases of at least another order of magnitude.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Institute of Standards and Technology (NIST); US Department of Commerce; National Science Foundation (NSF); USDOE Office of Science - Office of Nuclear Physics
OSTI Identifier:
1391751
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 93; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Mumm, H. P., Huber, M. G., Bauder, W., Abrams, N., Deibel, C. M., Huffer, C. R., Huffman, P. R., Schelhammer, K. W., Janssens, R., Jiang, C. L., Scott, R. H., Pardo, R. C., Rehm, K. E., Vondrasek, R., Swank, C. M., O'Shaughnessy, C. M., Paul, M., and Yang, L. High-sensitivity measurement of He3-He4 isotopic ratios for ultracold neutron experiments. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.93.065502.
Mumm, H. P., Huber, M. G., Bauder, W., Abrams, N., Deibel, C. M., Huffer, C. R., Huffman, P. R., Schelhammer, K. W., Janssens, R., Jiang, C. L., Scott, R. H., Pardo, R. C., Rehm, K. E., Vondrasek, R., Swank, C. M., O'Shaughnessy, C. M., Paul, M., & Yang, L. High-sensitivity measurement of He3-He4 isotopic ratios for ultracold neutron experiments. United States. doi:10.1103/PhysRevC.93.065502.
Mumm, H. P., Huber, M. G., Bauder, W., Abrams, N., Deibel, C. M., Huffer, C. R., Huffman, P. R., Schelhammer, K. W., Janssens, R., Jiang, C. L., Scott, R. H., Pardo, R. C., Rehm, K. E., Vondrasek, R., Swank, C. M., O'Shaughnessy, C. M., Paul, M., and Yang, L. Wed . "High-sensitivity measurement of He3-He4 isotopic ratios for ultracold neutron experiments". United States. doi:10.1103/PhysRevC.93.065502.
@article{osti_1391751,
title = {High-sensitivity measurement of He3-He4 isotopic ratios for ultracold neutron experiments},
author = {Mumm, H. P. and Huber, M. G. and Bauder, W. and Abrams, N. and Deibel, C. M. and Huffer, C. R. and Huffman, P. R. and Schelhammer, K. W. and Janssens, R. and Jiang, C. L. and Scott, R. H. and Pardo, R. C. and Rehm, K. E. and Vondrasek, R. and Swank, C. M. and O'Shaughnessy, C. M. and Paul, M. and Yang, L.},
abstractNote = {Research efforts ranging from studies of solid helium to searches for a neutron electric dipole moment require isotopically purified helium with a ratio of 3 He to 4 He at levels below that which can be measured using traditional mass spectroscopy techniques. We demonstrate an approach to such a measurement using accelerator mass spectroscopy, reaching the 10 - 14 level of sensitivity, several orders of magnitude more sensitive than other techniques. Measurements of 3 He / 4 He in samples relevant to the measurement of the neutron lifetime indicate the need for substantial corrections. We also argue that there is a clear path forward to sensitivity increases of at least another order of magnitude.},
doi = {10.1103/PhysRevC.93.065502},
journal = {Physical Review C},
issn = {2469-9985},
number = 6,
volume = 93,
place = {United States},
year = {2016},
month = {6}
}

Works referenced in this record:

Neutron electric-dipole moment, ultracold neutrons and polarized 3He
journal, February 1994


Review of Particle Physics
journal, August 2014


Gaseous Diffusion Coefficients
journal, January 1972

  • Marrero, T. R.; Mason, E. A.
  • Journal of Physical and Chemical Reference Data, Vol. 1, Issue 1
  • DOI: 10.1063/1.3253094

First operational experience with the positive-ion injector of ATLAS
journal, April 1993

  • Bollinger, L. M.; Pardo, R. C.; Shepard, K. W.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 328, Issue 1-2
  • DOI: 10.1016/0168-9002(93)90631-Q

Measuring the neutron lifetime using magnetically trapped neutrons
journal, December 2009

  • O’Shaughnessy, C. M.; Golub, R.; Schelhammer, K. W.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 611, Issue 2-3
  • DOI: 10.1016/j.nima.2009.07.054

Magnetic spectrographs for nuclear reaction studies
journal, June 1979


Progress in isotope analysis at ultra-trace level by AMS
journal, April 2005


Probable observation of a supersolid helium phase
journal, January 2004