Collisional electron detachment of atomic anions by noble gases: universal behavior at intermediate velocities

Abstract

Anions with atomic number lower than 18 had their total electron detachment cross sections measured in the 0.3-1.5 a.u. velocity range (40 keV-1.4 MeV) for He, Ne, and Ar targets with a experimental method developed in our laboratory. Several universal trends were observed: (a) each cross section can be described as the product of a target-dependent curve by a projectile-dependent constant; (b) for a given target all cross sections present a maximum at almost the same velocity; (c) the cross section ratios taken between different periods in a given column are target-independent.

Single-electron detachment for Cu−, Ag−and Au−in collision with Ar

“…In addition, such studies are of crucial importance in electron correlation theory, and are relevant to many other fields, such as plasma physics, ionosphere physics, astrophysics and flame chemistry. Thus many experiments studying electron detachment cross sections have been carried out for different ions in collision with different targets in the past few decades [4][5][6][7][8][9].…”

Dominant screening process in the projectile electron loss for F- + Ar collisions

“…The beam-attenuation experimental technique allows the determination of the total projectile destruction cross section [6][7][8]. This cross section corresponds to the sum of single and all multiple projectile-electron-loss collision channels, regardless of the target final charge state.…”