Observing Quantum Level Interference Effects with Electron Spectrometer

Abstract

The existence of Young-type interference patterns has been recently searched in triple dierential cross-sections for single ionization of H2 molecules by electron impact, and theoretically supported by calculations obtained by dierent models. The appearance of interference eects arising from the two-centre geometry of diatomic molecule. These eects seen in triple dierential cross-sections are described by interference factor in analogy with light waves. In this work, we discuss about that the interference factor for molecular structure of H2 may reproduce Young-type interference patterns depending on scattering angle, initial and ejected electron energies in triple dierential cross-sections. Dierences are expected in the triple dierential cross-sections spectra of ejected electrons according to kinematical conditions imposed by scattering angle and electron energy.

Secondary Electron Distribution of Atmospheric Nitrogen Molecule by 350 eV Electron Impact

“…[13]. The electron spectrometer is a crossed-beams type in which the incident electron beam collides orthogonally with the target gas beam and has been used to measure the triple differential crosssections (TDCS) for the electron-impact double excitation of helium [14,15], for the electron impact ionization of argon [16] and H 2 [17,18].The electron spectrometer was initially designed and constructed to measure angular and energy correlations between outgoing electrons. The same apparatus can also collect data on angular distribution of ejected or scattered electrons simply disabling the coincident circuit [19,20].…”

Interference effects for intermediate energy electron-impact ionization of H2and N2molecules

“…The details of the electron spectrometer are described in detail in previous papers [9,[12][13][14]. Briefly, the electron spectrometer consists of a electron gun producing a beam of electrons which passes through the gas target perpendicularly, two hemispherical electrostatic energy analyzers, a Faraday cup and a data acquisition system (see in figure 1a).…”

Double Differential Cross-Section Measurements for Electron Impact Ionization of Helium

“…triple dierential cross-sections Ref. [12]. The same apparatus can also collect data on angular distribution of ejected or scattered electrons simply disabling the coincident circuit.…”