THE EFFECT OF STATIC APPLIED MAGNETIC AND ELECTRIC-FIELDS ON THE DIELECTRONIC RECOMBINATION OF MG-II

A new calculation was performed of the dielectronic recombination rate coefficient alpha(DR) for the Mg-II ion, in cases for which static ma gnetic and electric fields are applied simultaneously in the collision region. The intermediate-state Hamiltonian was diagonalized in a basi s of states of fixed n (principal quantum number of the high Rydberg s tate electron) and included the paramagnetic, diamagnetic and Stark te rms. Our results showed enhancements of alpha(DR), when both magnetic and electric fields were present, beyond what occurred for an applied electric field alone. Generally. these additional enhancements depende d nontrivially upon the angle between the two applied fields. Also, in a region of elevated magnetic held strengths B-0 greater than or equa l to 1 kG, the diamagnetic term was found to play an important role, w hen n greater than or equal to 40.