UV TRANSITIONS OF ASTROPHYSICAL INTEREST IN GE-II, AS-II AND SE-II

An extensive set of oscillator strengths and transition probabilities has been obtained for the UV transitions originating from the ground 4 s(2)4p(n) (n = 1-3) states of Ge II, As II and Se II. These new data, calculated within the framework of a pseudo-relativistic Hartree-Fock (HFR) approach, fill in the gap existing in the atomic data needed for elemental abundance analysis of the interstellar medium. The f values are compared with the rather scarce results previously published in t he literature, The astrophysical implications of the new transition ra tes regarding the interstellar medium are discussed.