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

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [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
  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)
+ Show Author Affiliations

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.

Research Organization:
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 Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
FG02-03ER41258; PHY1068712; PHY1205833; IN111913; AC52-06NA25396; AC05-00OR22725; PHY-1068712; PHY-1205833
OSTI ID:
1234661
Alternate ID(s):
OSTI ID: 1179193; OSTI ID: 1286791
Report Number(s):
LA-UR-14-27825; PRBMDO
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 91, Issue 18; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 25 works
Citation information provided by
Web of Science

References (43)

Coupled hydrogen moderator optimization with ortho/para hydrogen ratio
  • Kai, Tetsuya; Harada, Masahide; Teshigawara, Makoto
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 523, Issue 3 https://doi.org/10.1016/j.nima.2003.11.427
journal May 2004
Fundamental neutron physics beamline at the spallation neutron source at ORNL
  • Fomin, N.; Greene, G. L.; Allen, R. R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 773 https://doi.org/10.1016/j.nima.2014.10.042
journal February 2015
Quantum Effects on Liquid Dynamics as Evidenced by the Presence of Well-Defined Collective Excitations in Liquid para -Hydrogen journal June 2000
A liquid parahydrogen target for the measurement of a parity-violating gamma asymmetry in
  • Santra, S.; Barrón Palos, L.; Blessinger, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 620, Issue 2-3 https://doi.org/10.1016/j.nima.2010.04.135
journal August 2010
Raman Spectroscopy of Hot Dense Hydrogen journal April 2003
Helium at nonzero temperatures: A variational density-matrix approach for Bose fluids journal June 1986
Neutron diffraction determination of the thermodynamic derivatives of the microscopic structure of liquid parahydrogen journal November 1998
The solid molecular hydrogens in the condensed phase: Fundamentals and static properties journal April 1980
Selected properties of hydrogen (engineering design data) report January 1981
Ion chamber system for neutron flux measurements
  • Szymanski, J. J.; Bowman, J. D.; Delheij, P. P. J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 340, Issue 3 https://doi.org/10.1016/0168-9002(94)90139-2
journal March 1994
Fundamental Neutron Physics Beamline at the Spallation Neutron Source at ORNL text January 2014
Pseudopotentials for centroid molecular dynamics: Application to self-diffusion in liquid para-hydrogen journal February 1996
The scattering of slow neutrons by ortho- and para -hydrogen
  • Squires, G. L.; Stewart, A. T.
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, Vol. 230, Issue 1180, p. 19-32 https://doi.org/10.1098/rspa.1955.0110
journal June 1955
The isotropic intermolecular potential for H 2 and D 2 in the solid and gas phases journal November 1978
A quantum fluid of metallic hydrogen suggested by first-principles calculations journal October 2004
Quantum statistics and the momentum distribution of liquid parahydrogen journal May 2009
Matter under extreme conditions of temperature and pressure journal January 1985
Messung der Streuquerschnitte von flüssigem und festem Wasserstoff, Deuterium und Deuteriumhydrid für thermische Neutronen journal June 1970
Benchmarking exchange-correlation functionals for hydrogen at high pressures using quantum Monte Carlo journal May 2014
GW study of the metal-insulator transition of bcc hydrogen journal July 2002
Influence of the equation of state on the compression and heating of hydrogen journal May 2003
Fundamental Equations of State for Parahydrogen, Normal Hydrogen, and Orthohydrogen journal September 2009
Determination of the parahydrogen fraction in a liquid hydrogen target using energy-dependent slow neutron transmission
  • Barrón-Palos, L.; Alarcon, R.; Balascuta, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 659, Issue 1 https://doi.org/10.1016/j.nima.2011.07.051
journal December 2011
Neutronic analysis of the bi-spectral moderator such as that proposed for ESS
  • Magán, M.; Sordo, F.; Zanini, L.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 729 https://doi.org/10.1016/j.nima.2013.07.011
journal November 2013
Static structure factor of liquid parahydrogen journal January 2004
A spherical potential for hydrogen from solid state and scattering data journal October 1984
Microscopic collective dynamics in liquid p a r a − H 2 journal December 1999
Insulator-metal transition of fluid molecular hydrogen journal October 1996
Correlated density matrix theory of normal quantum fluids journal August 1992
ENDF/B-VII.1 Nuclear Data for Science and Technology: Cross Sections, Covariances, Fission Product Yields and Decay Data journal December 2011
Hopping conductivity in dense hydrogen fluid journal May 2001
Minimum metallic conductivity of fluid hydrogen at 140 GPa (1.4 Mbar) journal February 1999
Measurements of the change of neutronic performance of a hydrogen moderator at Manuel Lujan Neutron Scattering Center due to conversion from ortho- to para-hydrogen state
  • Ooi, M.; Ino, T.; Muhrer, G.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 566, Issue 2 https://doi.org/10.1016/j.nima.2006.06.073
journal October 2006
Microscopic structure factor of liquid parahydrogen: Monte Carlo and molecular dynamics simulations journal December 2002
Microscopic structure factor of liquid para-hydrogen journal February 2002
Bose–Einstein Condensation and the λ Transition in Liquid Helium journal January 2002
Analytical and Numerical (Monte Carlo) Studies of Point and Space Group Symmetry-Breaking in the Liquid–Solid Phase Transition journal August 2001
Metallization of Fluid Molecular Hydrogen at 140 GPa (1.4 Mbar) journal March 1996
A note on the specific heat of the hydrogen molecule
  • Dennison, David M.
  • Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 115, Issue 771, p. 483-486 https://doi.org/10.1098/rspa.1927.0105
journal July 1927
Microscopic structure factor of liquid hydrogen by neutron-diffraction measurements journal January 2005
The total neutron cross section of liquid para-hydrogen journal December 1999
Insulator-metal transition in solid hydrogen: Implication of electronic-structure calculations for recent experiments journal September 1995
Hydrogen Properties for Fusion Energy book December 1986

Cited By (3)

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
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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