MOMENTUM-TRANSFER CROSS-SECTION FOR E--KR SCATTERING

The momentum transfer cross section for electrons in krypton has been derived over the energy range 0-4 eV from an analysis of drift velocit y and D(T)/mu data for hydrogen-krypton mixtures. At energies in the v icinity of the Ramsauer-Townsend minimum, the present work differs sig nificantly from derivations based on analyses of drift velocity data a lone. The overall uncertainty in the derived cross section reflects th e experimental errors in the transport coefficients, the uncertainty i n the cross sections used to represent the hydrogen component in the m ixtures, and the uncertainty associated with the chi2 minimisation. Th e present cross section is compared with recent theoretical calculatio ns and other experimental derivations.