Measurements and Theoretical Predictions of Charge Exchange Cross Sections and Emission Spectra for O6+ with H2O, CO, CO2, CH4, N2, NO, N2O and Ar

29th International Conference on Photonic, Electronic, and Atomic Collisions

Machacek, J.R.^1 ; Mahapatra, D.P.^2,3 ; Schultz, D.R.^4 ; Ralchenko, Yu.^5 ; Moradmand, A.^2 ; El Ghazaly, M.O.A.^2 ; Chutjian, A.^2

Positron Physics Group, Australian National University, ACT

2601, Australia^1

Astrophysics and Space Sciences Section, Jet Propulsion Laboratory/Caltech, Pasadena

CA

91109, United States^2

Department of Physics, Utkal University, Bhubaneswar

751004, India^3

Department of Physics, Univ. of North Texas, Denton

TX

76203, United States^4

Atomic Spectroscopy Group, National Institute of Standards and Technology, Gaithersburg

MD

20899-8422, United States^5

关键词: Charge-exchange cross sections;    Emission spectrums;    Nonradiative decays;    Planetary atmosphere;    Synthetic emissions;    Theoretical treatments;    Visible range;    X-ray emission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/2/022076/pdf
DOI  :  10.1088/1742-6596/635/2/022076

来源: IOP

【 摘 要 】

Relevant to modeling and understanding X-ray emission from cometary and planetary atmospheres, total charge-exchange cross sections for 1.17 and 2.33 keV/u O6+ions colliding with H2O, CO, CO2, CH4, N2, NO, N2O, and Ar have been measured and calculated for the processes of single, double, and triple exchanges. Synthetic emission spectra spanning the X-ray, UV, and visible ranges have also been calculated, based on theoretical treatment of the transfer of between one and six electrons from the target neutral to the projectile ion, followed by radiative and nonradiative decay of the resulting highly-excited projectile states.