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Comparison of kinematic and optical matrix methods for calculating reflectivity profiles of solid thin films and multilayers

Technical Report:

Abstract

A comparison of the calculation of neutron reflectivity profiles R(Q) by optical matrix methods and a multilayer method, based on the kinematic approximation, has been made. The latter method provides a fast simple route to calculating R(Q) and may be used with confidence for systems of total thickness {<=}200 ``A`` for a scattering length density difference ``Delta`` of the order of 1.0 x 10{sup -5} A {sup -2}. For thicker layers the approximation is poor and the optical matrix method must be used for an accurate evaluation of such reflectivity data over a wide Q range. (author).
Publication Date:
Jul 01, 1992
Product Type:
Technical Report
Report Number:
RAL-92-045
Reference Number:
SCA: 663610; PA: AIX-24:003926; SN: 93000913998
Resource Relation:
Other Information: PBD: Jul 1992
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; NEUTRON REFLECTORS; THIN FILMS; NEUTRONS; REFLECTIVITY; ACCURACY; CALCULATION METHODS; COMPARATIVE EVALUATIONS; EXPERIMENTAL DATA; LAYERS; REFLECTIVE COATINGS; 663610; NEUTRON PHYSICS
OSTI ID:
10109223
Research Organizations:
Rutherford Appleton Lab., Chilton (United Kingdom)
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Other: ON: DE93610133; TRN: GB9203061003926
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
GBN
Size:
[24] p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Eastoe, J, and Penfold, J. Comparison of kinematic and optical matrix methods for calculating reflectivity profiles of solid thin films and multilayers. United Kingdom: N. p., 1992. Web.
Eastoe, J, & Penfold, J. Comparison of kinematic and optical matrix methods for calculating reflectivity profiles of solid thin films and multilayers. United Kingdom.
Eastoe, J, and Penfold, J. 1992. "Comparison of kinematic and optical matrix methods for calculating reflectivity profiles of solid thin films and multilayers." United Kingdom.
@misc{etde_10109223,
title = {Comparison of kinematic and optical matrix methods for calculating reflectivity profiles of solid thin films and multilayers}
author = {Eastoe, J, and Penfold, J}
abstractNote = {A comparison of the calculation of neutron reflectivity profiles R(Q) by optical matrix methods and a multilayer method, based on the kinematic approximation, has been made. The latter method provides a fast simple route to calculating R(Q) and may be used with confidence for systems of total thickness {<=}200 ``A`` for a scattering length density difference ``Delta`` of the order of 1.0 x 10{sup -5} A {sup -2}. For thicker layers the approximation is poor and the optical matrix method must be used for an accurate evaluation of such reflectivity data over a wide Q range. (author).}
place = {United Kingdom}
year = {1992}
month = {Jul}
}