Multielectron excitations in theL-subshell photoabsorption of xenon

XAS of high pressure Xe clusters in amorphous carbon and computational simulation for the fcc and hcp xenon crystalline phases

“…. for ns) [20]. However, as for xenon gas, it was also observed a resonance about 15eV above the Fermi level, which some authors refers to that fine structure in solid phase to this same effect.…”

“…However, as for xenon gas, it was also observed a resonance about 15eV above the Fermi level, which some authors refers to that fine structure in solid phase to this same effect. This resonance occurs due to double electron monopole excitation in atomic Xe from 5p to 6p, i.e., a transition [2p,5p]→[nd, 6p] [20,21]. Due to the small cross section compared to the single electron excitation, it is difficult to observe those resonances since its intensity is very small compared to the white line [20].…”

“…This resonance occurs due to double electron monopole excitation in atomic Xe from 5p to 6p, i.e., a transition [2p,5p]→[nd, 6p] [20,21]. Due to the small cross section compared to the single electron excitation, it is difficult to observe those resonances since its intensity is very small compared to the white line [20]. As a result, the fine structure in XANES region for solid Xe may be not a consequence of multielectron excitation.…”

Synchrotron radiation induced X‐ray production cross sections of 66Dy at energies across its Li (i = 1–3) subshell absorption edges

“…These IPA models completely ignore the many-body effects [4][5][6][7][8][9][10] including electron correlations, core relaxation, inter channel coupling, and post collision interactions, which are expected to become important at incident photon energies in vicinity of the absorption edge energies of heavy elements. It has been shown in some earlier studies that the agreement between the measured and tabulated photoionization cross sections for some heavy elements is improved by including the electron-electron correlation effects [28,29] in the calculations of the photoionization cross sections.…”

“…[1][2][3] However, at incident photon energies in the vicinity of the absorption edges, many body effects such as the electron correlations and the relaxation effects including the exchange and overlap become significant in the photoionization [4][5][6][7][8][9][10] of atomic inner-shells. The influence of many body effects on photoionization processes through measurements of the X-ray absorption cross sections [9,10] and the Auger cross sections [6] was investigated at incident photon energies close to the L i absorption edges of some noble gas atoms. The reliability of the IPA models [1] has been tested through measurements of the L i (i = 1-3) subshell XRP cross sections at incident photon energies much above the L i absorption edge energies of different elements by a number of authors.…”