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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/10744443
Record Status
Checked
Record Id
10744443
Title
Small-angle scattering of neutrons on normal and superfluid liquid helium
Contributors
YM Tsipenyuk (P. L. Kapitza Institute of Physical Problems, Russian Academy of Sciences)
,
O Kirichek (STFC Rutherford Appleton Lab.)
,
O Petrenko (Warwick University)
Abstract
Experiments on small-angle scattering of neutrons on liquid helium at temperatures of 1.0–5?K at the ISIS pulsed neutron source (England) are reported. Detailed measurements of the angular distribution of the scattered neutrons reveal a significant change in the temperature dependence of the second moment of the pairwise correlation function (the first derivative of the angular distribution for small scattering angles). At high temperatures the angular distribution of the scattered neutrons follows the classical description for small-angle scattering, but at temperatures below the ?-point, quantum mechanical behavior is observed (scattering of neutrons on quantum fluctuations). It is confirmed experimentally that over the entire temperature range the neutron scattering cross section at zero angle is determined by classical thermodynamic fluctuations in the density.
Organisation
ISIS
,
ISIS-SANS2D
,
STFC
Keywords
ASTeC 2013-2014
,
superfluidity
,
liquid helium
,
thermodynamic properties
,
neutron sources
,
low-temperature
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Low Temp Phys
39, no. 9 (2013): 777.
doi:10.1063/1.4821758
2013
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