L(3)-SUBSHELL ALIGNMENT IN GOLD AND BISMUTH INDUCED BY LOW-VELOCITY CARBON-IONS

Angular distribution of the L(l) x-ray line (3s (1/2)--> 2P (3/2)) in Au and Bi induced by 3-9 MeV carbon ions has been measured. Values of the alignment parameter (A(2)) of the L(3)(2p(3/2)) subshell have been obtained from the data as a function of the carbon ion energy. The da ta have been compared with the calculations of the standard perturbed- stationary-state (PSS) theory with energy-loss (E), Coulomb deflection (C), and relativistic (R) corrections (ECPSSR) and ECPSSR with the in trashell (IS) effect included as a multiplicative factor. From this co mparison it is evident that an account for the IS coupling substantial ly improves agreement between theory and measurement. The effect of si multaneous multiple ionization of the M and higher shells on the measu red A(2) values is discussed.