Results 261 to 270 of about 47,052 (302)

The Measurement of the Luminescence of Fluoroscopic X-Ray Screens*

Journal of the Optical Society of America, 1949
The selection of a superior fluoroscopic screen for direct x-ray observation and diagnosis requires the measurement of the visual effectiveness of the shadows of objects on the screen. At clinical levels of excitation ZnS-CdS fluoroscopic screens are excited to brightnesses near the condition of cone to rod transition.
openaire   +2 more sources

X-Ray excited luminescence of organo-lanthanide complexes

Physical Chemistry Chemical Physics, 2019
Data on the luminescence of organo-lanthanide complexes excited by X-rays are provided.
Andrey A. Kukinov, Tatyana V. Balashova, Vasily A. Ilichev, Alexey N. Trufanov, Mikhail N. Ivin, Sergey V. Obolensky, Mikhail N. Bochkarev   +6 more
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Development of X-ray excitable luminescent probes for scanning X-ray microscopy

Ultramicroscopy, 1999
Transmission soft X-ray microscopy is now capable of achieving resolutions that are typically 5 times better than the best-visible light microscopes. With expected improvements in zone plate optics, an additional factor of two may be realized within the next few years.
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X-ray excited optical luminescence, photoluminescence, photostimulated luminescence and x-ray photoemission spectroscopy studies on BaFBr:Eu

Journal of Physics: Condensed Matter, 1997
The results of x-ray excited optical luminescence (XEOL), photoluminescence (PL), photostimulated luminescence (PSL) and x-ray photoemission spectroscopy (XPS) studies on the x-ray storage phosphor BaFBr:Eu are presented in this paper. Analyses of XEOL, PL and PSL spectra reveal features corresponding to the transitions from to configurations in ...
N Subramanian, R Kesavamoorthy, K Govinda Rajan, Mohammad Yousuf, Santanu Bera, S V Narasimhan   +5 more
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X-ray luminescence computed tomography: a sensitivity study

SPIE Proceedings, 2017
X-ray luminescence computed tomography (XLCT) is a hybrid molecular imaging modality that uses high energy x-ray photons to excite nanophosphors (e.g. Europium doped Gadolinium Oxysulfide – GOS: Eu3+) emitting optical photons to be measured by a sensitive detector for image reconstruction. XLCT has potentials to combine both the merits of x-ray imaging
Michael C. Lun, Wei Zhang, Changqing Li
openaire   +1 more source

X-ray luminescence of phosphor crystals excited by X-ray standing waves

Journal of Physics: Condensed Matter, 1992
The formation of X-ray standing wave field XRSW under Bragg diffraction conditions was demonstrated using such non-traditional secondary radiation as X-ray photoluminescence.
S I Zheludeva, M V Kovalchuk, I V Bashelhanov, L V Samoilova   +3 more
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X-ray-induced luminescence in crystalline SiO2

Journal of Applied Physics, 1983
The x-ray-induced ‘‘blue’’ emission from commercially available, high-quality synthetic quartz has been studied between 80 and 300 K. Three overlapping bands, each having a different quenching temperature, have been experimentally resolved in the as-grown crystals. These bands peak at 440, 425, and 380 nm; their half-widths are 0.64, 0.75, and 0.92 eV;
P. J. Alonso, L. E. Halliburton, E. E. Kohnke, R. B. Bossoli   +3 more
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On the Kinetics of X-Ray Induced Luminescence in Natural Quartz

physica status solidi (a), 1985
The temperature dependence of the luminescence of natural quartz induced by X-rays between 80 and 800 K is investigated. Using afterglow investigations, the temperature dependence of the low temperature luminescence is chiefly given by an activator level lying 60 meV above the valence band and on the other hand by nonradiative transitions of electrons ...
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X-ray luminescence of solid noble gases

Journal of Luminescence, 1970
Abstract Crystals of Ar, Kr, and Xe, grown from the melt in plastic or quartz tubes, show weak light emission during irradiation with X-rays. This luminescence consists of impurity and intrinsic contributions. It is called intrinsic if it is not suppressed by reduction of the impurity concentration.
K.J. Swyler, M. Creuzburg
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On the Decay of X-Ray Induced Luminescence of SiO2

1988
A radiation induced luminescence in crystalline and glassy SiO2 has been widely studied1,2 but, only few investigations of its afterglow behaviour have been reported3,4,5. This paper is dedicated to the study of the influence of usual and different added impurities on the x-ray induced luminescence and especially on it’s afterglow in crystalline and ...
I. Godmanis, W. Hohenau
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