Relativistic R-matrix calculations for L-shell photoionization cross sections of C II

Abstract

The photoionization cross section of the ground state 2s 2 2p 2 P o 1/2 and the first excited state 2s 2 2p 2 P o 3/2 of C II ions are systematically calculated using the fully relativistic R-matrix code DARC. The detailed resonances are presented and identified for the photon energy ranging from threshold (24.38 eV) up to 41.5 eV where the L-shell (2p, 2s) photoionization process is dominant. In the calculations, the relativistic effect and electronic correlation effect are well considered. It is found that the relativistic effect is very important for the light atomic system CII, which accounts for experimentally observed fine structure resonance peaks. A careful comparison is made between the present results and the experimental values, and also other theoretical data available in the literature, showing that good agreement is obtained for the resonance peaks.

Flammability and thermal degradation behavior of ethylene‐vinyl acetate/layered double hydroxides/zinc borate composites

“…The HRR measured by cone calorimeter is a significant parameter as it expresses an intensity of a fire, determining other parameters in turn. A pk‐HRR value is often used to judge the fire intensity . In Fig.…”

A sol–gel synthesis to prepare size and shape-controlled mesoporous nanostructures of binary (II–VI) metal oxides

“…[84][85][86] The synthesis methods for the preparation of Mg(OH) 2 with different morphologies have been demonstrated in the past. 40,42,78,80,[87][88][89] Most of these syntheses based on hydrothermal reactions of pure magnesium or magnesium oxide powder in an autoclave at higher temperature using longer reaction time and low reactant concentration. 42,78,80 Although a few wet chemical synthesis methods were demonstrated to make nanoparticles, 40,42 they are limited to one or two morphologies, relatively low yields, and economically disadvantages.…”

Preparation of TPU/GO/Mg‐Al LDHs Hybrid Material With Enhancing Flame Retardancy and Smoke Suppression Performance

“…This may due to the Mg−Al LDHs and GO can form dense insulating carbon layer to protect the internal polymer matrix from further combustion. Ignition timing (TTI) is also an important factor to evaluate fire spread rate [29] . It is obvious that TPU/GO/Mg−Al LDHs composites have a large extension of TTI, which can provide more time for rescue in the actual fire process.…”