Study of absorption parameters around the K edge for selected compounds of Gd

Abstract

The K shell absorption jump ratios, jump factors, effective atomic numbers, and electron densities were derived from the measured total mass attenuation coefficient using an energy dispersive X‐ray fluorescence spectrometer for Gd2O3, Gd2(CO3)3H2O, Gd2(C2O4)3H2O, and Gd2(SO4)3 compounds. The total mass attenuation coefficients were measured in the X‐ray energy range from 39.52 to 57.14 keV in a transmission geometry utilizing the Kα2, Kα1, Kβ1, and Kβ2 X‐rays from different secondary source targets excited by the 59.54‐keV photons from an Am‐241 annular source and detected by a Si(Li) detector with a resolution of 160 eV at 5.9 keV. The energy gap, ionization energy, electron affinity, and global electrophilicity parameters of oxide, sulfate, oxalate, and carbonate ions were calculated using density functional theory (B3LYP). The experimental results are discussed based on these parameters. Copyright © 2015 John Wiley & Sons, Ltd.

Determination of effective atomic numbers and electron densities from mass attenuation coefficients for some selected complexes containing lanthanides

“…Many researchers or research groups determined the mass attenuation coefficients, effective atomic numbers and electron densities of composite materials like compounds, complexes, glasses, polymers and biological materials [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. Some of those; El-Kateb and Abdul-Hamid [2] estimated that the mass attenuation coefficients, effective atomic numbers and electron densities in materials containing H, C, and O in the energy range 0.054-1.333 MeV using a 3X3 inch NaI(Tl) scintillation detectors.…”

“…The mass attenuation coefficients effective atomic numbers and electron densities of some selected amino acids were measured by Kore and Pawar [15] at 122, 356, 511, 662, 1170, 1275 and 1330 keV photon energies with the help of a NaI(Tl) detector. The K shell absorption jump ratios, jump factors, effective atomic numbers and electron densities from the measured total mass attenuation coefficients for the some selected compounds of gadolinium in the energy range from 39.52 to 57.14 keV energies were obtained by Akman et al [20] and the results were interpreted with the help of some chemical parameters such as energy gap, ionization energy, electron affinity, and global electrophilicity of ligands.…”

Determination of effective atomic numbers and mass attenuation coefficients of samples using in‐situ energy‐dispersive X‐ray fluorescence analysis

“…[11][12][13][14][15][16][17] Fu [18] determined the relationship between Z eff and R with the result of wavelength-dispersive XRFA; however, his result varied greatly with that obtained by Singh et al…”

Photon Absorption characteristics of some selected Enzyme Inhibitors used in Cancer Research in the Energy range 1 keV-100 GeV

“…The correct values of these parameters are important in applied science such as calculations of absorbed dose in radiotherapy, medical physics, nuclear industry, radiation physics and shielding. Many researcher and research groups have investigated the total mass attenuation coef icient, effective atomic number and electron density [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Sayyed et al [4], calculated the effective atomic numbers and electron densities of six analgesic and anti-in lammatory drugs in the energy range 1 keV to 100 MeV.…”

“…Akman et al [11], investigated the chemical effect on the total mass attenuation coef icients, molecular, atomic, and electronic cross sections, effective atomic numbers and electron densities for some selected indium complexes at 59.54 keV. The effective atomic numbers and electrons densities of some selected Gd compounds were determined using the total mass attenuation coef icients in the energy range from 39.52 to 57.14 keV by Akman et al [12]. The effective atomic numbers and electron densities from the measured values of mass attenuation coef icients for some selected samarium compounds near the K edge in the photon energy range from 36.847 up to 57.142 keV were determined by Akman et al [13].…”