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Measurement of the energy dependence of the neutron loss per bounce function on reflection from oil and grease surfaces using monochromatic ultracold neutrons

Measurement of the energy dependence of the neutron loss per bounce function on reflection from oil and grease surfaces using monochromatic ultracold neutrons
Measurement of the energy dependence of the neutron loss per bounce function on reflection from oil and grease surfaces using monochromatic ultracold neutrons
We report a technique for determining directly the energy dependent UCN loss per bounce function µ(E) for material surfaces using monochromatic UVN. Results of such measurements on Fomblin oil and grease surfaces are presented for neutrons with energies in the range 5 to 106 neV, in the temperature range 283-308 K. The results show that these materials exhibit a loss per bounce function in good agreement with that predicted by the theory of UCN scattering from an abrupt one dimensional complex potential step. Some evidence for very small energy changes at reflection was found for neutrons with energies close to the critical energy of the step. Values of the loss parameter (2f) = 4.7(0.2) and 3.7(0.2) x 10-5 (at 294 K) were deduced for the oil and grease surfaces respectively. The (2f) parameter of the oil was found to be strongly temperature dependent.
0168-9002
568-573
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Pendlebury, J.M.
ad2830e4-db24-4f37-a88a-88b25ca17634
Iaydjiev, P.
1af1591c-3c8a-492c-b7f1-3e01c7b67689
Mampe, W.
98fb78c4-1b10-4741-ae05-4daf461466a0
Green, K.
f73f35aa-2cc7-43c7-9866-cde6a31e28a0
Kilvington, A.I.
5f7a5a52-0fc0-48f2-87bf-fc12292df141
Richardson, D.J.
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Pendlebury, J.M.
ad2830e4-db24-4f37-a88a-88b25ca17634
Iaydjiev, P.
1af1591c-3c8a-492c-b7f1-3e01c7b67689
Mampe, W.
98fb78c4-1b10-4741-ae05-4daf461466a0
Green, K.
f73f35aa-2cc7-43c7-9866-cde6a31e28a0
Kilvington, A.I.
5f7a5a52-0fc0-48f2-87bf-fc12292df141

Richardson, D.J., Pendlebury, J.M., Iaydjiev, P., Mampe, W., Green, K. and Kilvington, A.I. (1991) Measurement of the energy dependence of the neutron loss per bounce function on reflection from oil and grease surfaces using monochromatic ultracold neutrons. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 308 (3), 568-573. (doi:10.1016/0168-9002(91)90069-3).

Record type: Article

Abstract

We report a technique for determining directly the energy dependent UCN loss per bounce function µ(E) for material surfaces using monochromatic UVN. Results of such measurements on Fomblin oil and grease surfaces are presented for neutrons with energies in the range 5 to 106 neV, in the temperature range 283-308 K. The results show that these materials exhibit a loss per bounce function in good agreement with that predicted by the theory of UCN scattering from an abrupt one dimensional complex potential step. Some evidence for very small energy changes at reflection was found for neutrons with energies close to the critical energy of the step. Values of the loss parameter (2f) = 4.7(0.2) and 3.7(0.2) x 10-5 (at 294 K) were deduced for the oil and grease surfaces respectively. The (2f) parameter of the oil was found to be strongly temperature dependent.

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More information

Published date: 20 October 1991
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 78352
URI: https://eprints.soton.ac.uk/id/eprint/78352
ISSN: 0168-9002
PURE UUID: 75384d37-8994-4af8-a9c7-d7e9da40b7d5
ORCID for D.J. Richardson: ORCID iD orcid.org/0000-0002-7751-1058

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 06 Mar 2019 01:37

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