A neutron diffraction study of deuterium short-range order in VD0.75

Autor:	G. Lautenschläger, E. Ressouche, R. Hock, H. Wipf, U. Knell, Hans Weitzel
Rok vydání:	1994
Předmět:	Crystallography Cross section (physics) Deuterium Chemistry Scattering Interstitial defect Neutron diffraction Atom General Materials Science Atomic physics Neutron scattering Condensed Matter Physics Small-angle neutron scattering
Zdroj:	Journal of Physics: Condensed Matter. 6:1461-1471
ISSN:	1361-648X 0953-8984
Popis:	We investigated the short-range order of D interstitials in cubic ( alpha '-phase) VD0.75 by neutron diffraction (room temperature measurements, powder sample). The VDx system is particularly favourable for neutron scattering experiments studying the short-range order of hydrogen interstitials in metals since the coherent scattering cross section of D exceeds the coherent cross section of V by a factor of approximately=300. This allows a data analysis that assumes that only the D atoms contribute to the coherent scattering intensity. The measured diffuse scattering intensity shows a nearly complete blocking of interstitial sites in the two nearest shells around a given D atom, and a reduced occupation probability for the sites in the third shell. The results indicate the existence of a strong short-range and repulsive interaction between the D atoms.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9e9592d5d83cc5779ae46d2bafcf8444 https://doi.org/10.1088/0953-8984/6/8/005 Zobrazit plný text záznamu