NORMALIZED BORN AND K-MATRIX APPROACHES FOR EXCITATION AND IONIZATION
CROSS-SECTIONS FROM EXCITED STATES
(n=2-4, DS=0) OF HeI

I.L. Beigman, L.A Vainshtein

P.N. Lebedev Physical Institute, Leninsky pr. 53, 117924 Moscow, Russia

The excitation cross-sections and rate coefficients from He I excited
states (nl-nl' for n=2-4 without change of spin) calculated by K-matrix
and normalized Born methods up to 200eV are presented. The comparison
with CCC method and experimental data is discussed.