Cross beam experiment for the scattering of low-energy electrons from methane

Molecular modeling of electron trapping in polymer insulators

“…There is very little experimental data for the electron affinity of linear alkanes. Measurements have been made for methane ͑Ϫ5 eV͒, 12 hexatriacontane n-C 36 H 74 (Ϫ0.3Ϯ0.5 eV) 13 and polyethylene (Ϫ0.5Ϯ0.5 eV). 14 The value of Ϫ5 eV for methane suggests that small alkane anions are metastable and difficult to observe.…”

Photoelectron emission from solid Ne tested by impurity adsorption

“…It is thought that the defects are relatively shallow traps, while much deeper traps could be a guest atom or molecule with positive electron affinity [5]. The atomic He, however, is a particle with very small positive affinity, 0.0054 Ry [6] which is equal 0.073 eV, and CH 4 molecule has negative electron affinity, E a = -5 eV [7,8]. The mechanism for the decrease in electron emission by impurity particles in our experiments is not clear at present.…”

Measurements of differential cross sections in the backscattering region

“…While there are ample measurements and calculations of differential cross sections in methane reported over the past 30 years (Rohr, 1980;Tanaka et al, 1982;Sohn et al, 1986;Shyn and Cravens, 1990;Boesten and Tanaka, 1991;Bundschu et al, 1997;Gianturco et al, 1995;Machado et al, 1998), the elastic scattering in the full angular range have only recently been determined by Allan and Ž ivanov (2005). In Fig.…”