| Autor: |
Dipti, Buechele, S W, Gall, A C, Sanders, S, Szabo, C I, Silwal, R, Takacs, E, Ralchenko, Yu |
| Předmět: |
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| Zdroj: |
Journal of Physics B: Atomic, Molecular & Optical Physics; 6/14/2020, Vol. 53 Issue 11, p1-11, 11p |
| Abstrakt: |
High-resolution x-ray spectra were recorded at the National Institute of Standards and Technology electron beam ion trap (EBIT) using two Johann-type crystal spectrometers, with their dispersion planes oriented parallel and perpendicular to the beam direction. The linear polarizations of the 1s2 − 1s2l transitions in He-like argon ions were determined from the measured spectra at electron beam energies of 3.87 and 7.91 keV. The theoretical analysis was performed using detailed collisional-radiative modeling of the non-Maxwellian EBIT plasma with the NOMAD code modified to account for magnetic sublevel atomic kinetics. Effects influencing the polarizations of the observed 1s2 − 1s2l lines were investigated, including radiative cascades, the 1s21S0 − 1s2s1S0 two-photon transition, and the charge exchange recombination of H-like argon ions. With these included, the measured polarizations of the resonance (1s21S0 − 1s2p1P1), intercombination (1s21S0 − 1s2p3P1), and forbidden lines (1s21S0 − 1s2s3S1, 1s21S0 − 1s2p3P2) were found to be in good agreement with the calculations. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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