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Title: AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences

Abstract

An elastic neutron scattering instrument, the advanced neutron diffractometer/reflectometer (AND/R), has recently been commissioned at the National Institute of Standards and Technology Center for Neutron Research. The AND/R is the centerpiece of the Cold Neutrons for Biology and Technology partnership, which is dedicated to the structural characterization of thin films and multilayers of biological interest. The instrument is capable of measuring both specular and nonspecular reflectivity, as well as crystalline or semicrystalline diffraction at wave-vector transfers up to approximately 2.20 A{sup -1}. A detailed description of this flexible instrument and its performance characteristics in various operating modes are given.

Authors:
; ; ; ; ; ; ; ; ; ;  [1];  [2];  [2]
  1. NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8562, Gaithersburg, Maryland 20899-8562 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20853364
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 77; Journal Issue: 7; Other Information: DOI: 10.1063/1.2219744; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BIOLOGY; COLD NEUTRONS; DIFFRACTOMETERS; NEUTRON DIFFRACTION; PERFORMANCE; REFLECTIVITY; THIN FILMS

Citation Formats

Dura, Joseph A., Pierce, Donald J., Majkrzak, Charles F., Maliszewskyj, Nicholas C., McGillivray, Duncan J., Loesche, Mathias, O'Donovan, Kevin V., Mihailescu, Mihaela, Perez-Salas, Ursula, Worcester, David L., White, Stephen H., Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, and Department of Physiology and Biophysics, University of California at Irvine, Medical Sciences I - D346, Irvine, California 92697-4560. AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences. United States: N. p., 2006. Web. doi:10.1063/1.2219744.
Dura, Joseph A., Pierce, Donald J., Majkrzak, Charles F., Maliszewskyj, Nicholas C., McGillivray, Duncan J., Loesche, Mathias, O'Donovan, Kevin V., Mihailescu, Mihaela, Perez-Salas, Ursula, Worcester, David L., White, Stephen H., Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, & Department of Physiology and Biophysics, University of California at Irvine, Medical Sciences I - D346, Irvine, California 92697-4560. AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences. United States. doi:10.1063/1.2219744.
Dura, Joseph A., Pierce, Donald J., Majkrzak, Charles F., Maliszewskyj, Nicholas C., McGillivray, Duncan J., Loesche, Mathias, O'Donovan, Kevin V., Mihailescu, Mihaela, Perez-Salas, Ursula, Worcester, David L., White, Stephen H., Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, and Department of Physiology and Biophysics, University of California at Irvine, Medical Sciences I - D346, Irvine, California 92697-4560. Sat . "AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences". United States. doi:10.1063/1.2219744.
@article{osti_20853364,
title = {AND/R: Advanced neutron diffractometer/reflectometer for investigation of thin films and multilayers for the life sciences},
author = {Dura, Joseph A. and Pierce, Donald J. and Majkrzak, Charles F. and Maliszewskyj, Nicholas C. and McGillivray, Duncan J. and Loesche, Mathias and O'Donovan, Kevin V. and Mihailescu, Mihaela and Perez-Salas, Ursula and Worcester, David L. and White, Stephen H. and Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 and Department of Physiology and Biophysics, University of California at Irvine, Medical Sciences I - D346, Irvine, California 92697-4560},
abstractNote = {An elastic neutron scattering instrument, the advanced neutron diffractometer/reflectometer (AND/R), has recently been commissioned at the National Institute of Standards and Technology Center for Neutron Research. The AND/R is the centerpiece of the Cold Neutrons for Biology and Technology partnership, which is dedicated to the structural characterization of thin films and multilayers of biological interest. The instrument is capable of measuring both specular and nonspecular reflectivity, as well as crystalline or semicrystalline diffraction at wave-vector transfers up to approximately 2.20 A{sup -1}. A detailed description of this flexible instrument and its performance characteristics in various operating modes are given.},
doi = {10.1063/1.2219744},
journal = {Review of Scientific Instruments},
number = 7,
volume = 77,
place = {United States},
year = {Sat Jul 15 00:00:00 EDT 2006},
month = {Sat Jul 15 00:00:00 EDT 2006}
}
  • We develop a technique to determine local density profiles in conformally rough thin films and multilayers for which conventional reflectometry does not work. The main idea is to integrate the total scattered intensity for a given vertical momentum transfer over the parallel momentum transfer. Probing Fourier space globally results in a local probe in real space and the integrated intensity is proportional to the local reflectivity of the surface. We also discuss the influence of a finite range of integration as well as sample inhomogeneities, such as nonconformity of the roughness. This technique is limited to situations where the kinematicmore » Born approximation is sufficient to describe the scattering process. However, in certain cases, the technique can be used in the vicinity of the critical angle of total external reflection as well.« less
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  • No abstract prepared.