Momentum Transfer Cross Section for e??Kr Scattering

Abstract

AbstmctThe momentum transfer cross section for electrons in krypton has been derived over the energy range Q-4 eV from an analysis of drift velocity and DT/I-' data for hydrogen-krypton mixtures. At energies in the vicinity of the Ramsauer-Townsend minimum, the present work differs significantly from derivations based on analyses of drift velocity data alone. The overall uncertainty in the derived cross section reflects the experimental errors in the transport coefficients, the uncertainty in the cross sections used to represent the hydrogen component in the mixtures, and the uncertainty associated with the X 2 minimisation. The present cross section is compared with recent theoretical calculations and other experimental derivations.

All-order relativistic many-body theory of low-energy electron-atom scattering

“…Indirect effects include a target wave function that is different due to relativistic effects. There have been a number of experimental determinations of the elastic cross section [34,50,[56][57][58][59][60][61][62] and the momentum transfer cross section [63][64][65][66][67]. Of the many calculations of the electron-krypton system [56,[68][69][70][71][72], the BSR calculation [42,72] is the most complete ab initio calculation.…”

“…There have been two analyses where MERT parameters were used to fit drift velocities for Kr-H 2 mixtures measured at ANU [66,67]. The most complete analysis using ANU data [67] gave −3.353 a 0 for the scattering length.…”

“…There have been two analyses where MERT parameters were used to fit drift velocities for Kr-H 2 mixtures measured at ANU [66,67]. The most complete analysis using ANU data [67] gave −3.353 a 0 for the scattering length. An analysis of drift velocity measurements for pure Kr from Oak Ridge National Laboratory (ORNL) gave −3.36(3) a 0 [73].…”

Density dependence of electron mobility in dense gases

“…The curve labelled PRB in Fig. 5 was obtained using Q ffz(E) data from Brennan and Ness [17]. There are no experimental values for these systems.…”

“…There is a large scatter between these two sets of experimental data. Our theoretical values are shown by curves PRH and PRB which used (2 ff~(E) data from Hayashi [14] and Brennan and Ness [17], respectively. Our PRH curve lies closer to the more recent data of Jacobson et al [16].…”