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Proceedings Paper

Low d-spacing titanium-based multilayers for neutrons
Author(s): Pierre Boher; Philippe Houdy; Andreas Magerl; K. Yamada; Yasuo Endoh; P. Ruterana
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Paper Abstract

The number of bilayers required in a neutron multilayer mirror depends directly on the different scattering cross sections of the materials selected for this purpose. So, conventional systems generally alternate two metallic systems: one with a high scattering cross section like Ni and one with a negative cross section like Ti. In this study, we show that more complicated systems such as TiN/Ti have improved potentials compared to conventional systems, due to the high scattering cross section of nitrogen. We present an experimental study of this new system using a pseudo-reactive rf-sputtering system and different in-situ and ex-situ characterization methods. Well-defined multi-layer structures are obtained with periodicities in the range 20 - 70 angstroms. Titanium and titanium nitride layers appear crystallized even for very low thickness. This induces a quite high interface roughness as observed by grazing x-ray reflection and transmission electron microscopy. Long range roughness appears limited and neutron reflectivity measured with cold neutrons ((lambda) equals 3.96 angstroms) is promising even for short periods around 40 angstroms.

Paper Details

Date Published: 23 November 1992
PDF: 12 pages
Proc. SPIE 1738, Neutron Optical Devices and Applications, (23 November 1992); doi: 10.1117/12.130620
Show Author Affiliations
Pierre Boher, Labs. d'Electronique Philips (France)
Philippe Houdy, Labs. d'Electronique Philips (France)
Andreas Magerl, Institut Laue-Langevin (Germany)
K. Yamada, Tohoku Univ. (Japan)
Yasuo Endoh, Tohoku Univ. (Japan)
P. Ruterana, Lab. d'Etudes et de Recherches sur les Materiaux (Switzerland)


Published in SPIE Proceedings Vol. 1738:
Neutron Optical Devices and Applications
Charles F. Majkrzak; James L. Wood, Editor(s)

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