Analytic approximation to incoherently scattered X-ray intensities

Balyuzi, H. H. M.

doi:10.1107/s0567739475001295

Cited by 78 publications

(44 citation statements)

References 5 publications

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“…The Compton scattering contribution was calculated using the fitting parameters provided in ref. [7] for the different elements. The normalization factor was obtained by the Krogh-Moe-Norman method.…”

Section: Introductionmentioning

confidence: 99%

Structural study of conventional and bulk metallic glasses during annealing

Pineda

Hidalgo

Bruna

et al. 2009

Journal of Alloys and Compounds

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Metallic glasses with conventional glass-forming ability (Al-Fe-Nd, Fe-Zr-B, Fe-B-Nb compositions) and bulk metallic glasses (Ca-Mg-Cu compositions) were studied by synchrotron X-ray diffraction during annealing throughout glass transition and crystallization temperatures.The analysis of the first diffraction peak position during the annealing process allowed us to follow the free volume change during relaxation and glass transition. The structure factor and the radial distribution function of the glasses were obtained from the X-ray measurements. The structural changes occurred during annealing are analyzed and discussed.

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Section: Introductionmentioning

confidence: 99%

Structural study of conventional and bulk metallic glasses during annealing

Pineda

Hidalgo

Bruna

et al. 2009

Journal of Alloys and Compounds

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“…For all the compositions studied, positions of maxima and minima of the structure factors of -irradiated and annealed glasses coincide with those of radiation-modified Ge 25 Sb 15 S 60 and Ge 35 Sb 5 S 60 glasses. Main difference between -irradiated and annealed glasses is observed only in the intensity of the FSDP for As-enriched composition Ge 16 As 24 S 60 for which the prepeak becomes weaker and broader under irradiation (Fig. 1b) similarly to the binary As 2 S 3 glass [19].…”

Section: Resultsmentioning

confidence: 99%

“…Finally, for all the glasses studied, it is found that radiation impact results in weakening and broadening of the FSDP with the first peak at r = 2.26-2.27 Å and the second peak at r = 3.55-3.60 Å; the effect is the largest one for Ge 16 As 24 S 60 (x = 16), smaller for Ge 24 As 16 S 60 (x = 24), and practically invisible for Ge 32 As 8 S 60 (x = 32) and Ge 36 As 4 S 60 (x = 36) alloys. …”

Section: Fig 2 (A) the Pair Distribution Functions G(r)mentioning

confidence: 95%

“…The scattering intensity was converted into the coherent scattering intensity per atom in electronic units by using the Krogh-Moe-Norman method [14,15]. Compton scattering was corrected using the values given by Balyuzi [16]. Faber-Ziman [17] total structure factor S(Q) was calculated from the scattering intensity as…”

Section: Methodsmentioning

confidence: 99%

“…Asprepared glasses were cut to the disk-like specimens and polished to a high optical quality. Then, in order to remove possible mechanical stresses formed after synthesis, the samples were annealed at about 20-30 K below the glass transition temperature [12] (T g = 530 K for Ge 16 As 24 S 60 , 620 K for Ge 24 Co radioisotope capsules. No special measures were taken to prevent uncontrolled thermal annealing of the samples, but maximum temperature in the irradiating camera did not exceed 320-330 K during prolonged -irradiation (about 30 days), providing the absorbed dose power P < 5 Gy/s.…”

Section: Methodsmentioning

confidence: 99%

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Radiation/annealing-induced structural changes in GexAs40-xS60 glasses as revealed from high-energy synchrotron X-ray diffraction measurements

Kavetskyy¹

2012

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Local atomic structure of Ge x As 40x S 60 glasses (x = 16, 24, 32, and 36) has been investigated in the -irradiated (2.41 MGy dose) and annealed after -irradiation states by using the high-energy synchrotron X-ray diffraction technique. The accumulated dose of 2.41 MGy is chosen to be close to the known in literature focal point (2.0 MGy) for the system tested, at which the -irradiation-induced optical (darkening) effect does not depend on the composition. It is established that the first sharp diffraction peak (FSDP) is located at around 1 Е 1 . 1  in the structure factors S(Q) of all the alloys studied. The FSDP position is found to be constant on radiation/annealing treatment, but the intensity of the FSDP reveals changes under irradiation/annealing only for the compositions with x = 16 and 24. The radiation/annealing-induced changes are also observed on the pair distribution functions in the first and second coordination shells for these compounds. Practically invisible effects on the FSDP and pair distribution functions are found for the alloys with x = 32 and 36. The radiation/annealing-induced structural changes detected mainly in the S As  sub-system of the glasses examined are well explainable within the Tanaka approach for interpretation of the photo-induced structural changes and related phenomena in As 2 S 3 chalcogenide glass and similar materials.

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Bestimmung der partiellen Strukturfaktoren aus der Röntgenstrahlenbeugung an flüssigem Silicium‐ und Germaniumtetrachlorid und ihren Mischungen

Baier

Weidner

1981

Ber Bunsenges Phys Chem

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i. Br.Flussigkeiten 1 Mischungen / Molekiilstruktur / Partielle Strukturfaktoren / Rbntgenstrukturuntersuchung Liquid SiCI,, liquid GeCI, and mixtures SiCI,/GeCI4 are investigated to yield partial structure factors and pair correlation functions for a liquid tetrachloride system, applying the method of chemical substitution to obtain independent x-ray diffraction experiments. The properties of the liquid system and the experimental results correspond to the criteria of applicability of the method. -X-ray diffraction investigations were performed with the pure components and three differently concentrated mixtures at 20°C. The molecular structure was determined by best fit procedures. The model parameters compare quite favourably with those of the literature. The three partial structure factors of pairs ZZ, ZL, LL were calculated from the five linear equations after separating the intramolecular contributions. Z refers to the molecular centre, L to the chloride atom. From the structure factors the partial pair correlation functions are accessible. The range of orientational correlation was estimated making use of the experimental results.

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Analytic approximation to incoherently scattered X-ray intensities

Cited by 78 publications

References 5 publications

Structural study of conventional and bulk metallic glasses during annealing

Structural study of conventional and bulk metallic glasses during annealing

Radiation/annealing-induced structural changes in GexAs40-xS60 glasses as revealed from high-energy synchrotron X-ray diffraction measurements

Bestimmung der partiellen Strukturfaktoren aus der Röntgenstrahlenbeugung an flüssigem Silicium‐ und Germaniumtetrachlorid und ihren Mischungen

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