Near-threshold electron impact excitation of the argon 3p⁵4s configuration-–new and revised normalized differential cross sections using recent time-of-flight measurements for normalization

Abstract

Revised electron impact differential cross section (DCS) for excitation of the four levels comprising the 3p 5 4s configuration of argon and their sum are reported for incident electron

Near-threshold electron impact excitation of the argon 3p54s configuration—new and revised normalized differential cross sections using recent time-of-flight measurements for normalization

“…We should have also mentioned in our paper that the trend in the data of Allan et al [2] possibly suggests systematically smaller cross sections than obtained in the present work. These lower cross sections, especially at 12.5 eV, are in better agreement with the BSR-31 predictions than those published in [1].…”

Pressure broadening of 772.376 and 772.421 nm argon lines and kinetics of argon metastable atoms

“…9) (longer lifetime for these atoms) 50 , or to a more efficient production rate of these atoms by collisional transfers from the resonance state Ar(1s2), involving Ar atoms and/or bulk electrons. In fact, the cross-section for electron impact excitation of argon into 1s3 metastable state is about 1 x 10 -22 m 2 , compared to 2 x 10 -21 m 2 for the resonance 1s2 state and 1 x 10 -21 m 2 for both 1s4 and 1s5 states 67 . Thus, e-impact excitation of Ar atoms should strongly overpopulate 1s2 state relative to 1s3.…”

Low-energy electron scattering from molecular hydrogen: Excitation of the X1Σg+ to bZawadzki1, Wright2, Dolmat3 et al. 2018Phys. Rev. A

“…However, their fixed θ limited the data that could be obtained. A later system capable of differential angles θ from 45 o to 130 o , with a higher energy resolution, energy-selected (60-80 meV, FWHM) pulsed electron beam was built by Buckman and coworkers [36] and was used to measure the excitation of He n = 2,3 levels at E 0 = 20.35 eV, 22.0 eV and 23.48 eV [37] as well as for Ar at 12.5 eV, 14 eV, 15 eV and 17.5 eV for θ from 55 o to 125 o [38] (see also [39]). Similarly as in [34]…”