Photoelectric cross sections for 6<i>–</i>20-keV photons in beryllium, carbon, magnesium, aluminum, silicon, copper, silver, and lead

Nathuram, R.; Rao, I. Srinivasa; Mehta, M.K.

doi:10.1103/physreva.37.4978

Cited by 16 publications

(6 citation statements)

References 7 publications

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“…The availability of advanced X-ray sources and development of improved theories have enhanced the development of experimental methodologies (Diaz-Moreno, 2012;Prešeren et al, 2001;Kurisaki et al, 2008;Chantler, 2009) particularly for structural analyses of materials using different sample types. Several particularly insightful and accurate X-ray absorption studies have been verified by developments in theory and by comparison of experimental results (Deslattes, 1959;Hughes et al, 1968;Gerward et al, 1979;Rao et al, 1981;Nathuram et al, 1988), claiming accuracy of around 1%, usually for ideal systems such as elemental metals or monoatomic solids. Further investigation by the International Union of Crystallography led to several archetypal studies of consistency and (Mica et al, 1985;Creagh & Hubbell, 1987, 1990.…”

Section: Accuracymentioning

confidence: 96%

High-accuracy X-ray absorption spectra from mMsolutions of nickel (II) complexes with multiple solutions using transmission XAS

Chantler

Islam

Best

et al. 2015

J Synchrotron Radiat

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A new approach is introduced for determining X-ray absorption spectroscopy (XAS) spectra on absolute and relative scales using multiple solutions with different concentrations by the characterization and correction of experimental systematics. This hybrid technique is a development of standard X-ray absorption fine structure (XAFS) along the lines of the high-accuracy X-ray extended range technique (XERT) but with applicability to solutions, dilute systems and cold cell environments. This methodology has been applied to determining absolute XAS of bis(N-n-propyl-salicylaldiminato) nickel(II) and bis(N-i-propyl-salicylaldiminato) nickel(II) complexes with square planar and tetrahedral structures in 15 mM and 1.5 mM dilute solutions. It is demonstrated that transmission XAS from dilute systems can provide excellent X-ray absorption near-edge structure (XANES) and XAFS spectra, and that transmission measurements can provide accurate measurement of subtle differences including coordination geometries. For the first time, (transmission) XAS of the isomers have been determined from low-concentration solutions on an absolute scale with a 1-5% accuracy, and with relative precision of 0.1% to 0.2% in the active XANES and XAFS regions after inclusion of systematic corrections.

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Section: Accuracymentioning

confidence: 96%

High-accuracy X-ray absorption spectra from mMsolutions of nickel (II) complexes with multiple solutions using transmission XAS

Chantler

Islam

Best

et al. 2015

J Synchrotron Radiat

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“…Several independent measurements of x-ray attenuation coefficients have been published, and these measurements showed significant differences that led the International Union of Crystals (International Union of Crystalography) (IUCr) to the multi-lab project to explore the causes of these differences [11,12,13], The most important out come of the project was that these differences were the result of a lack of understanding of the wide range of sources of random and systematic inaccuracies. In a number of recent studies, it was noted that the dominant source of error in measuring the mass attenuation coefficient was the inaccuracy in determining the thickness of the absorbent material along the path of the x-ray beam transmission which ranges in accuracy between (2% -0.5%) [14,15]. Low energy photons are used in basic applied sciences [16].…”

Section: -Introductionmentioning

confidence: 99%

Determination of the mass attenuation coefficient for Aluminum element using (Cu,Mo) X-rays tubes

Kheder¹,

Ali²

2019

Tikrit J. Pure Sci.

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In this study the value of linear and mass attenuation coefficients of Aluminum element (Al) were determinated by using x-ray Cu-tube of energies CuKα (8.048) KeV, CuKβ (8.906) KeV, and Mo-tube of energies MoKα (17.480) KeV and MoKβ (19.609) KeV.the voltage between the two electrodes are up to 35 KV.The measured values are compared with other experimental data showing a general agreement within a precision of 0.2% - 0.8%. The mass attenuation cross-sections were thus derived and compared with other experimental data available on database of x-ray attenuation cross-sections. The agreement is always within ±7%. http://dx.doi.org/10.25130/tjps.24.2019.013

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“…The K shell photoelectric cross section is happened when the incident photon energy is greater than the K shell absorption energy. The photoelectric cross sections were obtained experimentally and theoretically by many authors at different incident photon energies [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Chemical effect on theKshell absorption parameters of some selected cerium compounds

2016

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In this study, the photoelectric cross section values of Ce, CeCl 3 .7H 2 O, Ce 2 (SO 4 ) 3 , Ce(OH) 4 and Ce 2 O 3 samples were measured in the energy range from 31.82 keV up to 51.70 keV by adopting in narrow beam geometry. Using these photoelectric cross sections, the K shell photoelectric cross sections at the K-edge, the K shell absorption jump ratios and jump factors, the Davisson-Kirchner ratios and K shell oscillator strength values were estimated experimentally. The measured parameters were compared with the theoretical calculated values. It is observed that the K shell photoelectric cross section at the K-edge and K shell oscillator strength values of an element are affected by the chemical environment of material while the K shell absorption jump ratio, K shell absorption jump factor and Davisson-Kirchner ratio are not affected by the chemical environment of material for the present samples. To the best of our knowledge, the chemical effects on the Davisson-Kirchner ratio and K shell oscillator strength have not been discussed for any element by now.

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Photoelectric cross sections for 6–20-keV photons in beryllium, carbon, magnesium, aluminum, silicon, copper, silver, and lead

Cited by 16 publications

References 7 publications

High-accuracy X-ray absorption spectra from mMsolutions of nickel (II) complexes with multiple solutions using transmission XAS

High-accuracy X-ray absorption spectra from mMsolutions of nickel (II) complexes with multiple solutions using transmission XAS

Determination of the mass attenuation coefficient for Aluminum element using (Cu,Mo) X-rays tubes

Chemical effect on theKshell absorption parameters of some selected cerium compounds

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