H-TYPE OF HIDDEN CROSSINGS IN ATOMIC-COLLISIONS INVOLVING HIGHLY-CHARGED IONS

We examine the structures of the hidden crossings of the adiabatic pot ential curves E(R) in the problem of two Coulomb centres with charges Z(2) and Z(1), when Z(2) much greater than Z(1). In this case we obser ve a new type of hidden crossing between the states (n,l,m)-(n,l+1,m), where n,l, and m are the spherical quantum numbers of the united atom . This leads to he appearance of a mechanism of nonadiabatic transitio ns in hydrogen-multicharged ion collisions. As an example of this mech anism we present results of a calculation of inelastic transitions in O7+ (1S) + H collisions.