Electron impact ionization of individual sub-shells and total of L and M shells of atomic targets with Z = 38–92

Abstract

We report an extension and modification of the MCN model of Haque et al (2013 Rad. Phys. Chem. 91 50-9) (XMCN) to study the electron impact ionization of inner L and M shells of neutral atoms by introducing new parameters of the MCN model. The extended XMCN model, including the relativistic effect, has been applied with success to evaluate ionization crosssections of various atomic targets with Z = 38-92 for both individual subshells and total L-shell and the corresponding cross-sections for the M shell for Z = 79-92 at incident energies E Threshold   T 1 GeV. A comparison with other available theoretical and experimental cross-sections reveals that our results reproduce the experimental measurements with a reasonable accuracy.

Polymer complexes. LXVIII. Spectroscopic studies of supramolecular copper(II) polymeric complexes of biologically active monomer derived from novel sulfa drug

“…The binding properties of monomer (HL) and complexes (1)(2)(3)(4) to calf thymus DNA (CT-DNA) were studied using electronic absorption spectroscopy. A stock solution of CT-DNA was prepared in 5 mM Tris-HCl/50 mM NaCl buffer (pH = 7.2), which showed a ratio of UV absorbance at 260 and 280 nm (A 260 /A 280 ) of ca 1.8-1.9, indicating that the DNA was sufficiently free of protein.…”

“…Analyses of the metals followed the dissolution of the solid complexes in concentrated HNO 3 , neutralizing the diluted aqueous solutions with ammonia and titrating the metal solutions with EDTA. 1 H NMR spectra, with samples in solution in deuterated dimethylsulfoxide (DMSO-d 6 ), were recorded with a 330 MHz Varian-Oxford Mercury at room temperature using tetramethylsilane as an internal standard. Electron spin resonance (ESR) spectra were recorded with a JES-FE2XG ESR spectrophotometer at the Microanalytical Center, Tanta University.…”

“…The synthesis of thermally stable coordination polymers of transition metals with multidentate chelating ligands has attracted much interest in recent years. [1] Coordination polymers as chelating ligands is an interesting topic in the branch of coordination chemistry due to the supramolecular structure and high thermal stability. The main attraction of coordination polymers is due to their high thermal stability.…”

Electron impact L-subshell and total L-shell ionization cross-sections of atoms (Z = 18–92)

“…The last few decades saw a huge amount of theoretical and experimental studies to evaluate the electron impact inner shell ionization cross-sections (EIISICS) of atoms and molecules [3,4]. Most of the theoretical and experimental EIISICS studies are carried out for K-shell ionization [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] but these are very scarce for L-shell [20][21][22][23][24][25][26][27].…”