Measurement of Li X-ray fluorescence production cross sections and intensity ratios of some elements at 59.54 keV

2015 ◽  
Vol 93 (10) ◽  
pp. 1057-1066 ◽  
Author(s):  
F. Akman ◽  
R. Durak ◽  
M.R. Kaçal ◽  
M.F. Turhan
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reasonable Agreement ◽  
Production Cross ◽  
Radioactive Source ◽  
Experimental Results ◽  
X Ray ◽  
Intensity Ratios ◽  
Theoretical Results ◽  
Excitation Geometry

The Li (i = l, α, β, γ) X-ray production cross section and Lα/Ll, Lα/Lβ, Lα/Lγ, Ll/Lβ, Ll/Lγ, and Lβ/Lγ intensity ratio values for Yb, Ta, W, Hg, Tl, Pb, Bi, Th, and U have been determined using an excitation geometry at 59.54 keV incident photon energy. The measurements were performed using an Am-241 annular radioactive source and a high resolution Si(Li) detector. The experimental results of Li X-ray production cross sections and intensity ratios were compared with three different theoretical results and other available experimental results in the literature. Reasonable agreement is typically observed between the present and theoretical results.

Alloying effect on K X-ray intensity ratios, K X-ray production cross-sections and radiative Auger ratios in superalloys constitute from Al, Ni and Mo elements

2010 ◽  
Vol 377 (1-3) ◽  
pp. 100-108 ◽  
Author(s):  
N. Kup Aylikci ◽  
E. Tiraşoğlu ◽  
İ.H. Karahan ◽  
V. Aylikci ◽  
M. Eskil ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
Alloying Effect ◽  
X Ray ◽  
Intensity Ratios

Measurement of L X-ray production cross sections and relative intensities of some lanthanide compounds depending on the temperature

2020 ◽  
Vol 108 (5) ◽  
pp. 415-423
Author(s):  
Esra Cinan ◽  
Bünyamin Aygün ◽  
M. I. Sayyed ◽  
Yüksel Özdemir
Keyword(s):  
Cross Sections ◽  
Full Width Half Maximum ◽  
Production Cross ◽  
Emission Spectra ◽  
X Rays ◽  
X Ray ◽  
Different Temperatures ◽  
Intensity Ratios ◽  
Annular Source

AbstractL X-ray intensity ratios for CeO2, Sm2(SO4)3, Ho2O3, and Yb2O3 compounds were experimentally investigated. The measurements were gauged following excitation by 59.54 keV γ-rays from a 100 mCi 241Am radioactive annular source at different temperatures in situ. Temperature change occurred between 50 °C and 400 °C. L X-ray emission spectra were obtained by using a solid-state Si(Li) X-ray detector. L X-ray production cross sections, intensity ratios, and full-width half maximum (FWHM) values for the compounds were determined by evaluating the emission spectra varying with the temperature. According to the results obtained, it was observed that Lβ1 X-rays were less influenced in comparison with Lα X-rays while Lα X-rays were also less influenced in comparison with Lβ2 X-rays.

The Scattering of Positrons by Helium: Total Cross Sections up to 270 eV

1975 ◽  
Vol 53 (10) ◽  
pp. 962-967 ◽  
Author(s):  
B. Jaduszliwer ◽  
A. Nakashima ◽  
D. A. L. Paul
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Born Approximation ◽  
Reasonable Agreement ◽  
Experimental Results ◽  
Formation Cross Section ◽  
Sum Rule ◽  
Total Cross Sections ◽  
High Energies

The total cross sections for the scattering of positrons by helium have been measured by the method of transmission in the 16 to 270 eV energy range. The experimental results are higher than those of Canter et al. but are in reasonable agreement with recent results of Griffith et al., and at high energies tend towards Born approximation calculations. The integral of the cross section over positron momentum is smaller than the sum rule estimate made by Bransden et al. A tentative value of (0.034 ± 0.017)πa02 is assigned to the positronium formation cross section at threshold.

Photon-Induced L-Shell X-Ray Production Cross Sections for Lanthanides at 59.54 keV

2017 ◽  
Vol 890 ◽  
pp. 223-226 ◽  
Author(s):  
Rıdvan Durak ◽  
Ferdi Akman ◽  
Abdulhalik Karabulut
Keyword(s):  
High Resolution ◽  
Cross Sections ◽  
Production Cross ◽  
Theoretical Data ◽  
Experimental Results ◽  
X Rays ◽  
X Ray ◽  
Reflection Geometry ◽  
Experimental Values ◽  
Annular Source

The Ll, Lα and Lβ X-ray production cross sections for Pr, Nd, Sm, Eu, Gd and Tb elements were determined using a reflection geometry. The excitation was performed with a 241Am radioactive annular source and the L X-rays emitted from targets were counted with a high-resolution Si (Li) detector. The experimental values were compared with other available experimental results and theoretical data. An agreement is observed between the measured and other experimental results or theoretical data.

Effect ofpH treatment onK-shell x-ray intensity ratios andK-shell x-ray-production cross sections in ZnCo alloys

2011 ◽  
Vol 84 (4) ◽  
Author(s):  
N. Kup Aylikci ◽  
V. Aylikci ◽  
A. Kahoul ◽  
E. Tiraşoğlu ◽  
İ. H. Karahan ◽  
...  
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
X Ray ◽  
Intensity Ratios

scholarly journals L-shell Ionization of Sn and Gd by 20?100 keV Electron Impact

1983 ◽  
Vol 36 (3) ◽  
pp. 287 ◽  
Author(s):  
GW Baxter ◽  
BM Spicer
Keyword(s):  
Electron Impact ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Experimental Results ◽  
X Ray ◽  
Atomic States ◽  
Shell Ionization

Measurements have been made of the relative X-ray .production cross-section ratios L./Ly, L./Lp and L./Ll using electrons of energy from 20 to 100 keV incident on thin targets of tin and gadolinium. The experimental ratios obtained are compared with theoretical values. Modification of these ratios due to the formation of double-vacancy atomic states has been calculated, but this effect on its own is not sufficient to account for the discrepancy between the L./Ll theoretical and experimental results for tin.

X-ray production cross sections, intensity ratios, and centroid energy shifts ofAg KandLandAu Lx rays produced byO16beams of 12-50 MeV

1974 ◽  
Vol 10 (6) ◽  
pp. 1932-1937 ◽  
Author(s):  
G. Bissinger ◽  
P. H. Nettles ◽  
S. M. Shafroth ◽  
A. W. Waltner
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
X Ray ◽  
Intensity Ratios

Determination of K shell absorption parameters for some lanthanides using the X-ray attenuation method

2015 ◽  
Vol 93 (12) ◽  
pp. 1532-1540 ◽  
Author(s):  
F. Akman ◽  
R. Durak ◽  
M.R. Kaçal
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Experimental Results ◽  
Secondary Source ◽  
X Rays ◽  
Strength Parameters ◽  
X Ray ◽  
Total Attenuation ◽  
First Time

The total attenuation cross section at the K edge, absorption jump ratio, jump factor, Davisson–Kirchner ratio, and oscillator strength parameters for the K shell were determined by measuring the total attenuation cross sections around the K edge for Pr, Nd2O3, and Sm. The measurements were performed in a secondary excitation geometry using the Kα2, Kα1, Kβ1, and Kβ2 X-rays (in the region from 31.817 to 55.293 keV) from different secondary source targets excited by the 59.54 keV γ-photons from an 241Am annular source. It is the first time that the Davisson–Kirchner ratio values have been determined for present samples. The experimental results were compared with the theoretically calculated and other available experimental results.

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