Accurate estimations of circumstellar and interstellar lines of quadruply ionized vanadium using the coupled cluster approach

摘要

Accurate {\it ab initio} calculations have been carried out to study thevalence electron removal energies and oscillator strengths of astrophysicallyimportant electromagnetic transitions of quadruply ionized vanadium, $V^{4+}$.Many important electron correlations are considered to all-orders using therelativistic coupled-cluster theory. Calculated ionization potentials and finestructure splittings are compared with the experimental values, whereveravailable. To our knowledge, oscillator strengths of electric dipoletransitions are predicted for the first time for most of the transitions. Thetransitions span in the range of ultraviolet, visible and near infrared regionsand are important for astrophysical observations.