Gamma radiation sources with57CO for x-ray fluorescence analysis

Atomic Energy ◽  
1992 ◽  
Vol 72 (4) ◽  
pp. 366-368
Author(s):  
A. I. Leonov ◽  
V. G. Meshcheryakov ◽  
G. V. Tyamin
Keyword(s):  
Gamma Radiation ◽  
Fluorescence Analysis ◽  
X Ray ◽  
Radiation Sources

57Co and109Cd photon-radiation sources for X-ray fluorescence analysis

1988 ◽  
Vol 64 (2) ◽  
pp. 163-166 ◽  
Author(s):  
N. A. Konyakhin ◽  
B. V. Zatolokin ◽  
V. G. Meshcheryakov ◽  
G. V. Tyamin
Keyword(s):  
Fluorescence Analysis ◽  
Photon Radiation ◽  
X Ray ◽  
Radiation Sources

Microscopic X-ray Fluorescence Analysis with Synchrotron Radiation Sources

2011 ◽  
pp. 1737-1759 ◽  
Author(s):  
F. Adams ◽  
B. Vekemans ◽  
G. Silversmit ◽  
B. De Samber ◽  
L. Vincze
Keyword(s):  
Synchrotron Radiation ◽  
Fluorescence Analysis ◽  
X Ray ◽  
Radiation Sources

scholarly journals The Dosimetric Parameters Investigation of the Pulsed X-ray and Gamma Radiation Sources

2016 ◽  
Vol 671 ◽  
pp. 012051 ◽  
Author(s):  
S G Stuchebrov ◽  
I A Miloichikova ◽  
X O Shilova
Keyword(s):  
Gamma Radiation ◽  
X Ray ◽  
Radiation Sources

scholarly journals Degradation of 4-Chlorophenol by Gamma Radiation of 137Cs and X-rays

2019 ◽  
Vol 54 (3) ◽  
Author(s):  
Julio César González-Juárez ◽  
Jaime Jiménez-Becerril ◽  
Jesús Cejudo-Álvarez
Keyword(s):  
Energy Transfer ◽  
Gamma Radiation ◽  
Crystalline Structure ◽  
Linear Energy Transfer ◽  
The Other ◽  
X Rays ◽  
137Cs Source ◽  
X Ray ◽  
Radiolytic Degradation ◽  
Radiation Sources

This paper presents results of radiolytic degradation of 4-chlorophenol in the presence of TiO2, Al2O3, y SiO2, using different radiation sources than 60Co, which is so common in this type of experiment. The radiation sources used were X-rays with energy of 100 keV and radiation from 137Cs (662 keV). After irradiation with a dose of 50 cGy X-ray and TiO2 obtained a degradation of about 5%, no degradation was obtained with 137Cs source and other oxides. This may be due to the fact that X-rays have a linear energy transfer (LET) greater value, and in the case of TiO2 present a crystalline structure, whereas the other two oxides are amorphous. Both characteristics result in better formation of a reactive species that allows the degradation of the compound.

scholarly journals Investigation on radiation generated by sub-GeV electrons in ultrashort silicon and germanium bent crystals

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
L. Bandiera ◽  
A. Sytov ◽  
D. De Salvador ◽  
A. Mazzolari ◽  
E. Bagli ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Beam Direction ◽  
X Ray ◽  
Radiation Spectra ◽  
Radiation Sources ◽  
Angular Acceptance ◽  
Volume Reflection ◽  
Silicon And Germanium ◽  
Bent Crystals ◽  
First Time

AbstractWe report on the measurements of the spectra of gamma radiation generated by 855 MeV electrons in bent silicon and germanium crystals at MAMI (MAinzer MIkrotron). The crystals were 15 $$\upmu \text {m}$$ μ m thick along the beam direction to ensure high deflection efficiency. Their (111) crystalline planes were bent by means of a piezo-actuated mechanical holder, which allowed to remotely change the crystal curvature. In such a way it was possible to investigate the radiation emitted under planar channeling and volume reflection as a function of the curvature of the crystalline planes. We showed that, using volume reflection, intense gamma radiation can be produced – with intensity comparable to that obtained in channeling but with higher angular acceptance. We studied the trade-off between radiation intensity and angular acceptance at different values of the crystal curvature. The measurements of radiation spectra have been carried out for the first time in bent germanium crystals. In particular, the intensity of radiation in the germanium crystal is higher than in the silicon one due to the higher atomic number, which is important for the development of the X-ray and gamma radiation sources based on higher-Z deformed crystals, such as crystalline undulators.

An x-ray microprobe based upon a close-coupled focal-spot / glass capillary arrangement

1992 ◽  
Vol 50 (2) ◽  
pp. 1758-1759
Author(s):  
D. A. Carpenter ◽  
M. A. Taylor
Keyword(s):  
Imaging Techniques ◽  
Fluorescence Analysis ◽  
High Sensitivity ◽  
Specimen Preparation ◽  
X Rays ◽  
Glass Capillary ◽  
Close Coupling ◽  
X Ray ◽  
Point To Point ◽  
Beam Damage

The development of intense sources of x rays has led to renewed interest in the use of microbeams of x rays in x-ray fluorescence analysis. Sparks pointed out that the use of x rays as a probe offered the advantages of high sensitivity, low detection limits, low beam damage, and large penetration depths with minimal specimen preparation or perturbation. In addition, the option of air operation provided special advantages for examination of hydrated systems or for nondestructive microanalysis of large specimens.The disadvantages of synchrotron sources prompted the development of laboratory-based instrumentation with various schemes to maximize the beam flux while maintaining small point-to-point resolution. Nichols and Ryon developed a microprobe using a rotating anode source and a modified microdiffractometer. Cross and Wherry showed that by close-coupling the x-ray source, specimen, and detector, good intensities could be obtained for beam sizes between 30 and 100μm. More importantly, both groups combined specimen scanning with modern imaging techniques for rapid element mapping.

XRMF applications of a monolithic, polycapillary, focusing x-ray optic

1996 ◽  
Vol 54 ◽  
pp. 240-241
Author(s):  
D. A. Carpenter ◽  
Ning Gao ◽  
G. J. Havrilla
Keyword(s):  
Trace Elements ◽  
Point Source ◽  
Focal Spot ◽  
Fluorescence Analysis ◽  
X Rays ◽  
Focal Distance ◽  
Spot Diameter ◽  
X Ray ◽  
Focal Spot Diameter

A monolithic, polycapillary, x-ray optic was adapted to a laboratory-based x-ray microprobe to evaluate the potential of the optic for x-ray micro fluorescence analysis. The polycapillary was capable of collecting x-rays over a 6 degree angle from a point source and focusing them to a spot approximately 40 µm diameter. The high intensities expected from this capillary should be useful for determining and mapping minor to trace elements in materials. Fig. 1 shows a sketch of the capillary with important dimensions.The microprobe had previously been used with straight and with tapered monocapillaries. Alignment of the monocapillaries with the focal spot was accomplished by electromagnetically scanning the focal spot over the beveled anode. With the polycapillary it was also necessary to manually adjust the distance between the focal spot and the polycapillary.The focal distance and focal spot diameter of the polycapillary were determined from a series of edge scans.

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