Charge Transfer Reactions in Monatomic and Diatomic Gases

Abstract

Cross sections for charge transfer reactions between ions and neutral atoms and molecules have been measured in the energy range from 50 to 850 ev. Charge transfer cross sections for symmetrical reactions in monatomic and diatomic gases increase with increasing viscosity cross sections. The charge transfer cross sections decrease with increasing incident ion energy in conformity with the adiabatic criterion. For reactions in diatomic gases the charge transfer cross sections decrease as the changes in internuclear distance for the processes increase.

Instrument-independent cad spectral databases: absolute cross-section measurements in QQQ instruments

“…Together with our results for Ar+{Ar,Ar)Ar+, figure 5 also summarizes experimental [28][29][30][31][32][33][34][35][36][37][38][39][40][41] and theoretical [42][43][44][45][46][47] results for this reaction from the literature [48]. Prior to our work it was not clear which theoretical model one could or should use to obtain reliable estimates of UE values for use in target thickness calibrations in the 5-60 e V range of collision energies, the range typically used for CAD experiments.…”

“…5), as well as with the experimental u(E) of other workers (see fig. 5, data labeled HES [34), Z (28), H (35), KPS [37], DSEG [29], FS [36]). For the data labeled C [31], the UE values are sig.…”

Relative Charge-Transfer Efficiencies ofP322andAmme1, Haugsjaa2 1968Phys. Rev.

“…Agreement with the Firsov formula for / quite good. The experimental results of Dillon et a/., 9 and of Kushnir et al, 10 are also plotted. The theoretical calculation by Rapp and Francis 11 agrees closely with the lower of the two Firsov curves.…”

Zero Sound in Classical Liquids

“…(1). For this purpose we approximate the non-randomphase-approximation terms in the equation of motion 7 for the density fluctuation pj in the manner suggested by Singwi et al 8 for the case of an electron liquid. This procedure takes approximately into account local field corrections which in the present case, where we are dealing with a hard-core potential, are of primary importance.…”

“…The expression for ip(q) obtained in Ref. 8 can be written in the form ^(q) = ~irj [sin(qr)-qr cos (qr)]g(r)-^~-dr. (6) In the present case <p(r) is the 6:12 Lennard-Jones potential and^(r) is the equilibrium pair-distribution function. Equation (6) has been found 8 to be a reasonable approximation for large values of q.…”