Laser-induced transitions between triply excited hollow states

We present an ab initio calculation of the Li+ photoion yield in the presen ce of laser coupling between the triply; excited 2s(2)2p(2)P(o) and 2s2p(2) D-2(e) resonances in lithium, the first of which is assumed excited by syn chrotron radiation from the ground state. The laser coupling between the tr iply excited states is shown to lead to a significant and readily measurabl e modification of the line profile which provides a unique probe of the dip ole strength between highly correlated triply excited states.