Super-elastic electron scattering from the laser-excited 41P1 state of calcium at low incident energy

Atomic collision parameters have been measured for electron impact excitation of calcium using the superelastic scattering method, at incident electron energies equivalent to similar to 10 eV and similar to 12 eV. The parameters P-lin, L-perpendicular to and gamma were derived for the 4(1)P(1) state, and the related Stokes parameters determined. The results are compared to previously published calculations from four different theories: a relativistic distorted wave calculation, an R-matrix calculation, an R-matrix theory using B-splines and a convergent close coupling theory.