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Title: Measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission

Abstract

The scattering of slow neutron beams provides unique, non-destructive, quantitative information on the structure and dynamics of materials of interest in physics, chemistry, materials science, biology, geology, and other fields. Liquid hydrogen is a widely-used neutron moderator medium, and an accurate knowledge of its slow neutron cross section is essential for the design and optimization of intense slow neutron sources. In particular the rapid drop of the slow neutron scattering cross section of liquid parahydrogen below 15 meV, which renders the moderator volume transparent to the neutron energies of most interest for scattering studies, is therefore especially interesting and important. We have placed an upper bound on the total cross section and the scattering cross section for slow neutrons with energies between 0.43 meV and 16.1 meV on liquid hydrogen at 15.6 K using neutron transmission measurements on the hydrogen target of the NPDGamma collaboration at the Spallation Neutron Source at Oak Ridge National Laboratory. At 1 meV this new upper bound is a factor of 3 below the data from previous work which has been used in the design of liquid hydrogen moderators at slow neutron sources. We describe our measurements, compare them with previous work, and discuss themore » implications for designing more intense slow neutron sources.« less

Authors:
 [1];  [2];  [3];  [2];  [4];  [5];  [6];  [7];  [8];  [1];  [9];  [10];  [9];  [11];  [12];  [1];  [1];  [13];  [3];  [6] more »;  [10];  [4];  [1];  [9];  [4];  [9];  [14];  [15] « less
+ Show Author Affiliations
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Arizona State Univ., Tempe, AZ (United States)
  3. Univ. Nacional Autonoma de Mexico (Mexico)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of New Hampshire, Durham, NH (United States)
  6. Univ. of Kentucky, Lexington, KY (United States)
  7. Univ. of Tennessee, Knoxville, TN (United States); Univ. of Kentucky, Lexington, KY (United States)
  8. Univ. of Virginia, Charlottesville, VA (United States)
  9. Indiana Univ., Bloomington, IN (United States)
  10. Univ. of Manitoba, Winnipeg (Canada)
  11. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  12. Univ. of Tennessee-Chattanooga, Chattanooga, TN (United States)
  13. Middle Tennessee State Univ., Murfreesboro, TN (United States); Univ. of Manitoba, Winnipeg (Canada)
  14. Indiana Univ., Bloomington, IN (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  15. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1234661
Alternate Identifier(s):
OSTI ID: 1179193; OSTI ID: 1286791
Report Number(s):
LA-UR-14-27825
Journal ID: ISSN 1098-0121; PRBMDO
Grant/Contract Number:  
FG02-03ER41258; PHY1068712; PHY1205833; IN111913; AC52-06NA25396; AC05-00OR22725; PHY-1068712; PHY-1205833
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 18; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY

Citation Formats

Grammer, K. B., Alarcon, R., Barrón-Palos, L., Blyth, D., Bowman, J. D., Calarco, J., Crawford, C., Craycraft, K., Evans, D., Fomin, N., Fry, J., Gericke, M., Gillis, R. C., Greene, G. L., Hamblen, J., Hayes, C., Kucuker, S., Mahurin, R., Maldonado-Velázquez, M., Martin, E., McCrea, M., Mueller, P. E., Musgrave, M., Nann, H., Penttilä, S. I., Snow, W. M., Tang, Z., and Wilburn, W. S. Measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.180301.
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Grammer, K. B., Alarcon, R., Barrón-Palos, L., Blyth, D., Bowman, J. D., Calarco, J., Crawford, C., Craycraft, K., Evans, D., Fomin, N., Fry, J., Gericke, M., Gillis, R. C., Greene, G. L., Hamblen, J., Hayes, C., Kucuker, S., Mahurin, R., Maldonado-Velázquez, M., Martin, E., McCrea, M., Mueller, P. E., Musgrave, M., Nann, H., Penttilä, S. I., Snow, W. M., Tang, Z., & Wilburn, W. S. Measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission. United States. https://doi.org/10.1103/PhysRevB.91.180301
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Grammer, K. B., Alarcon, R., Barrón-Palos, L., Blyth, D., Bowman, J. D., Calarco, J., Crawford, C., Craycraft, K., Evans, D., Fomin, N., Fry, J., Gericke, M., Gillis, R. C., Greene, G. L., Hamblen, J., Hayes, C., Kucuker, S., Mahurin, R., Maldonado-Velázquez, M., Martin, E., McCrea, M., Mueller, P. E., Musgrave, M., Nann, H., Penttilä, S. I., Snow, W. M., Tang, Z., and Wilburn, W. S. Fri . "Measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission". United States. https://doi.org/10.1103/PhysRevB.91.180301. https://www.osti.gov/servlets/purl/1234661.
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@article{osti_1234661,
title = {Measurement of the scattering cross section of slow neutrons on liquid parahydrogen from neutron transmission},
author = {Grammer, K. B. and Alarcon, R. and Barrón-Palos, L. and Blyth, D. and Bowman, J. D. and Calarco, J. and Crawford, C. and Craycraft, K. and Evans, D. and Fomin, N. and Fry, J. and Gericke, M. and Gillis, R. C. and Greene, G. L. and Hamblen, J. and Hayes, C. and Kucuker, S. and Mahurin, R. and Maldonado-Velázquez, M. and Martin, E. and McCrea, M. and Mueller, P. E. and Musgrave, M. and Nann, H. and Penttilä, S. I. and Snow, W. M. and Tang, Z. and Wilburn, W. S.},
abstractNote = {The scattering of slow neutron beams provides unique, non-destructive, quantitative information on the structure and dynamics of materials of interest in physics, chemistry, materials science, biology, geology, and other fields. Liquid hydrogen is a widely-used neutron moderator medium, and an accurate knowledge of its slow neutron cross section is essential for the design and optimization of intense slow neutron sources. In particular the rapid drop of the slow neutron scattering cross section of liquid parahydrogen below 15 meV, which renders the moderator volume transparent to the neutron energies of most interest for scattering studies, is therefore especially interesting and important. We have placed an upper bound on the total cross section and the scattering cross section for slow neutrons with energies between 0.43 meV and 16.1 meV on liquid hydrogen at 15.6 K using neutron transmission measurements on the hydrogen target of the NPDGamma collaboration at the Spallation Neutron Source at Oak Ridge National Laboratory. At 1 meV this new upper bound is a factor of 3 below the data from previous work which has been used in the design of liquid hydrogen moderators at slow neutron sources. We describe our measurements, compare them with previous work, and discuss the implications for designing more intense slow neutron sources.},
doi = {10.1103/PhysRevB.91.180301},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
number = 18,
volume = 91,
place = {United States},
year = {Fri May 08 00:00:00 EDT 2015},
month = {Fri May 08 00:00:00 EDT 2015}
}
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https://doi.org/10.1103/PhysRevB.91.180301
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    Works referencing / citing this record:

    Cryostat for the provision of liquid hydrogen with a variable ortho-para ratio for a low-dimensional cold neutron moderator
    text, January 2020

    Optimization of moderators and beam extraction at the ESS
    journal, March 2018

    • Andersen, Ken Holst; Bertelsen, Mads; Zanini, Luca
    • Journal of Applied Crystallography, Vol. 51, Issue 2
    • DOI: 10.1107/s1600576718002406

    Cryostat for the provision of liquid hydrogen with a variable ortho-para ratio for a low-dimensional cold neutron moderator
    journal, January 2020

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