Double Differential Cross-Section Measurements for Methane Molecule at 350 eV

Abstract

Double dierential cross-sections have been measured after ionizing electron collisions with methane at primary energy of 350 eV using a conventional electron spectrometer. An electrostatic analyzer was used to measure angular distributions of secondary electrons with energies between 25 eV and 300 eV. Angles of emission were 25• to 130• . It was found that the outgoing electrons belong to one of the two energetically separated groups, either the fast electrons which are scattered mainly in forward direction or the slow electrons which are distributed isotropically into all angles. For higher ejection energies the maxima shifted towards smaller angles as expected from binary type collision.

Fivefold differential cross sections for electron-induced double ionization of outer and inner valence (1t2 and 2a1) molecular orbitals of CH4

“…Total cross sections measurement [6-9] Double differential cross sections measurement [10] Triply differential cross sections measurement of the outer and inner valence (1t2 and 2a1) orbitals [11][12][13] Total (elastic plus inelastic) electron-scattering cross sections calculation [14][15][16] Total and triply differential cross sections calculation [17][18][19] have a large energy (typically greater than 5 keV) compared to the energies of the ejected electrons (less than 200 eV) [20]. However, these experiments remain essentially limited to atomic targets such as noble gases [21][22][23][24][25].…”

Time Series Artificial Neural Network Approach for Prediction of Optical Lens Properties

“…Electron optical systems are widely used in many scientific instruments, such as electron microscopes, time of flight spectrometers, and electron guns [1,2]. Among these optical tools, three-element electrostatic cylindrical lens systems are perfectly suited to use in collision experiments [3,4].…”

Triple differential cross section measurements for the outer valence molecular orbitals (1t2) of a methane molecule at 250 eV electron impact

“…In earlier experiments, interest mainly focused on electron-impact elastic differential cross sections [21][22][23][24][25] and the energy-loss spectra for methane [26][27][28][29]. At impact energies above the ionization threshold, the double differential cross section (DDCS) measurements are also interesting to investigate the ionization process of methane [30][31][32][33][34].…”