Electronic structure and fluorescence spectrum of the HeO+ cation

Quantum-mechanical calculations of the potential curves of the HeO+ ion are preformed which correlate with four lower dissociation limits and indicate the excimer type of the ion. The transition dipole moments of the 2(2)Sigm a (-) --> 1(2)Sigma (-) and 2(4)Sigma (-) --> 1(4)Sigma (-) transitions are calculated. The energies and radiative lifetimes of vibrational levels are determined and structural and spectroscopic constants of the states 1(2)Si gma (-), 2(2)Sigma (-), 1(4)Sigma (-), and 2(4)Sigma (-) are calculated. Th e fluorescence spectrum corresponding to the 2(2)Sigma (-) --> 1(2)Sigma (- ) and 2(4)Sigma (-) --> 1(4)Sigma (-) transitions is also calculated. The p ossibility of lasing at these transitions is discussed. (C) 2001 MAIK "Nauk a/Interperiodica".