Optically stimulated luminescence in Cu-doped sodium chloride single crystal for a high-quality X-ray imaging sensor

A classical elpasolite-type structure is considered with respect to dynamically disordered ammonium fluoro-(oxofluoro-)metallates. Single-crystal X-ray diffraction data from high quality (NH4)3HfF7 and (NH4)3Ti(O2)F5 samples enabled the refinement of the ligand and cationic positions in the cubic Fm \bar 3 m (Z = 4) structure. Electron-density atomic profiles show that the ligand atoms are distributed in a mixed (split) position instead of 24e. One of the ammonium groups is disordered near 8c so that its central atom (N1) forms a tetrahedron with vertexes in 32f. However, a center of another group (N2) remains in the 4b site, whereas its H atoms (H2) occupy the 96k positions instead of 24e and, together with the H3 atom in the 32f position, they form eight spatial orientations of the ammonium group. It is a common feature of all ammonium fluoroelpasolites with orientational disorder of structural units of a dynamic nature.

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Characterization of Fine-Pixel X-Ray Imaging Detector Array Fabricated by Using Thick Single-Crystal CdTe Layers on Si Substrates Grown by MOVPE

IEEE Transactions on Electron Devices ◽

10.1109/ted.2018.2883325 ◽

2019 ◽

Vol 66 (1) ◽

pp. 518-523

Author(s):

Madan Niraula ◽

Kazuhito Yasuda ◽

Shintaro Tsubota ◽

Taiki Yamaguchi ◽

Junya Ozawa ◽

...

Keyword(s):

Single Crystal ◽

Detector Array ◽

X Ray ◽

Si Substrates ◽

X Ray Imaging ◽

Imaging Detector

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Redetermination of Sr2PdO3 from single-crystal X-ray data

Acta Crystallographica Section E Crystallographic Communications ◽

10.1107/s2056989018017176 ◽

2019 ◽

Vol 75 (1) ◽

pp. 30-32

Author(s):

Gohil S. Thakur ◽

Hans Reuter ◽

Claudia Felser ◽

Martin Jansen

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Diffraction Data ◽

Structure Refinement ◽

Structure Type ◽

X Ray Diffraction ◽

High Quality ◽

X Ray ◽

Cell Parameters ◽

Anisotropic Displacement Parameters

The crystal structure redetermination of Sr2PdO3 (distrontium palladium trioxide) was carried out using high-quality single-crystal X-ray data. The Sr2PdO3 structure has been described previously in at least three reports [Wasel-Nielen & Hoppe (1970). Z. Anorg. Allg. Chem. 375, 209–213; Muller & Roy (1971). Adv. Chem. Ser. 98, 28–38; Nagata et al. (2002). J. Alloys Compd. 346, 50–56], all based on powder X-ray diffraction data. The current structure refinement of Sr2PdO3, as compared to previous powder data refinements, leads to more precise cell parameters and fractional coordinates, together with anisotropic displacement parameters for all sites. The compound is confirmed to have the orthorhombic Sr2CuO3 structure type (space group Immm) as reported previously. The structure consists of infinite chains of corner-sharing PdO4 plaquettes interspersed by SrII atoms. A brief comparison of Sr2PdO3 with the related K2NiF4 structure type is given.

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Linear parabolic single-crystal diamond refractive lenses for synchrotron X-ray sources

Journal of Synchrotron Radiation ◽

10.1107/s1600577516017331 ◽

2017 ◽

Vol 24 (1) ◽

pp. 103-109 ◽

Cited By ~ 22

Author(s):

Sergey Terentyev ◽

Maxim Polikarpov ◽

Irina Snigireva ◽

Marco Di Michiel ◽

Sergey Zholudev ◽

...

Keyword(s):

Single Crystal ◽

Focal Spot ◽

Synthetic Diamond ◽

Picosecond Laser ◽

Radius Of Curvature ◽

High Quality ◽

X Ray ◽

Single Crystal Diamond ◽

Refractive Lens ◽

Focusing Properties

Linear parabolic diamond refractive lenses are presented, designed to withstand high thermal and radiation loads coming from upgraded accelerator X-ray sources. Lenses were manufactured by picosecond laser treatment of a high-quality single-crystal synthetic diamond. Twelve lenses with radius of curvature at parabola apex R = 200 µm, geometrical aperture A = 900 µm and length L = 1.5 mm were stacked as a compound refractive lens and tested at the ESRF ID06 beamline. A focal spot of size 2.2 µm and a gain of 20 were measured at 8 keV. The lens profile and surface quality were estimated by grating interferometry and X-ray radiography. In addition, the influence of X-ray glitches on the focusing properties of the compound refractive lens were studied.

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CsPbBr3 Single Crystal X-ray Detector with Schottky Barrier for X-ray Imaging Application

ACS Applied Electronic Materials ◽

10.1021/acsaelm.9b00832 ◽

2020 ◽

Vol 2 (4) ◽

pp. 879-884 ◽

Cited By ~ 3

Author(s):

Qiang Xu ◽

Xiang Wang ◽

Hang Zhang ◽

Wenyi Shao ◽

Jing Nie ◽

...

Keyword(s):

Single Crystal ◽

Schottky Barrier ◽

X Ray ◽

X Ray Imaging ◽

Imaging Application

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Calibration tests and use of a Nicolet/Xentronics imaging proportional chamber mounted on a conventional source for protein crystallography

Journal of Applied Crystallography ◽

10.1107/s0021889888012348 ◽

1989 ◽

Vol 22 (2) ◽

pp. 123-137 ◽

Cited By ~ 15

Author(s):

Z. Derewenda ◽

J. R. Helliwell

Keyword(s):

Data Collection ◽

Single Crystal ◽

Proportional Counter ◽

Protein Crystallography ◽

System Optimization ◽

High Quality ◽

X Ray ◽

Proportional Chamber ◽

A Performance

The results are presented of calibration tests and several single-crystal X-ray data collection experiments undertaken with a Nicolet/Xentronics Imaging Proportional Counter mounted on a conventional X-ray source. Considerable attention has been given to system optimization in collaboration with Nicolet, and this has led to a performance of high quality.

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