ZfN: Search Results

1	Author	Thomas Wieder	Requires cookie*
	Title	A Generalized Debye Scattering Formula and the Hankel Transform
	Abstract	The diffracted intensity of an x-ray or neutron diffraction experiment is expressed as an integral over an atomic position distribution function. A generalized Debye scattering formula results. Since this distribution function is expanded into a series of spherical harmonics, an inverse Hankel transform of the intensity allows the calculation of the expansion coefficients which describe the atomic arrangement completely. The connections between the generalized Debye scattering formula and the original Debye formula as well as the Laue scattering formula are derived.
	Reference	Z. Naturforsch. 54a, 124—130 (1999); received December 15 1998
	Published	1999
	Keywords	X-ray Scattering, Debye Formula, Hankel Transform
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/54/ZNA-1999-54a-0124.pdf
	Identifier	ZNA-1999-54a-0124
	Volume	54

2	Author	Z. Naturforsch	Requires cookie*
	Title	A Neutron and X-ray Diffraction Study of the Structure of Nd Phosphate Glasses
	Abstract	Diffraction experiments were performed on two (Nd203)x(P205)i_ x glasses for studying the en vironmental order of the Nd3+ cations. In case of the metaphosphate glass (x = 0.25) a combination of X-ray and neutron diffraction data was used to separate the N d-0 and 0 -0 first neighbor peaks. An N d-0 coordination number of 6.6±0.3 and a mean N d-0 distance of (0.239±0.001) nm were determined. In the ultraphosphate glass studied (x = 0.20) these values increase to 6.9±0.3 and (0.240±0.001) nm where the N d-0 coordination number is equal to the number of terminal oxygen atoms (0 T) which are available for coordination of each Nd3+ cation. This indicates the formation of NdOn polyhedra not sharing any O atom where also all 0 T's are in N d-0T-P positions. In the metaphosphate glass the NdO" polyhedra have to share some 0 T sites.
	Reference	Z. Naturforsch. 56a, 237—243 (2001); received January 8 2001
	Published	2001
	Keywords	Neutron Scattering, X-ray Scattering, Short-range Order, Phosphate Glasses
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/56/ZNA-2001-56a-0237.pdf
	Identifier	ZNA-2001-56a-0237
	Volume	56

3	Author	Walter Hoyer, Hartmut Neumann, Manfred Wobst	Requires cookie*
	Title	Structure Investigation on Liquid Tellurium by X-Ray and Neutron Scattering
	Abstract	We present the results of neutron and X-ray scattering experiments on liquid tellurium. No dependence on temperature of the radius and the coordination number of the first neighbour shell has been found in the temperature range between 460 °C and 550 °C. We investigate the influence of the truncation of the Fourier transformation on the determined coordination number of nearest neighbours and on the shape of the second coordination maximum at both, the lower and upper integration limit. The structure of liquid tellurium can be described in terms of a chain-like atomic arrangement with two bonds per atom.
	Reference	Z. Naturforsch. 47a, 833—840 (1992); received May 8 1992
	Published	1992
	Keywords	Neutron scattering, X-ray scattering, Short-range order, Liquid tellurium, Termination effect
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/47/ZNA-1992-47a-0833.pdf
	Identifier	ZNA-1992-47a-0833
	Volume	47

4	Author	Hartmut Neumann, Walter Hoyer, Manfred Wobst	Requires cookie*
	Title
	Abstract	From neutron and X-ray diffraction investigations on liquid Ge15Te85, Sn16Te84 and Pb14 5Te85 5 alloys the coordination numbers and nearest neighbour distances of these systems are obtained. The partial structure factors and partial pair correlations reveal that the short-range order of the eutectic Ge-Te melt differs from that of the eutectic Sn-Te and Pb-Te melts.
	Reference	Z. Naturforsch. 46a, 739 (1991); received June 19 1991
	Published	1991
	Keywords	Neutron scattering, X-ray scattering, short-range order, liquid alloys, eutectic Ge-Te, Sn-Te and Pb-Te melts
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_A/46/ZNA-1991-46a-0739.pdf
	Identifier	ZNA-1991-46a-0739
	Volume	46