Spin-orbit and exchange effects are separately identified through the
measurement of integrated Stokes parameters P-2 and P-3 for the decay
radiation from spin-polarized electron impact excited states. The obse
rvations are made for the radiations from the transitions 3p'[1/2](1)
--> 3s'[1/2](0)(616.4 nm) and 3p[1/2](1) --> 3s[3/2](2) (703.3 nm) in
neon just above threshold.