Second spectrum of Chromium (Cr II), Part II: Radiative lifetimes and oscillator strengths of transitions depopulating low lying 3d44p levels

Radiative lifetime and oscillator strength values were computed by means of a pseudo-relativistic Hartree-Fock model including core-polarization and compared successfully with experimental data given in the literature for respectively numerous low-lying Cr II 3d44p levels, up to 54784 cm−1, and transitions depopulating these levels. Then transition probability and branching fraction data were also deduced in the wavelength range 1825-94400 Å. Furthermore the extracted radial integral values, obtained with the help of the oscillator strength parameterization method, are given for involved transitions in this work, i.e. 3d44s-3d44p, 3d5-3d44p and 3d44p-3d44d. We confirm our observed previous general trends, noting once again a decreasing of transition radial integral values with filling nd shells of the same principal quantum numbers for ndk(n+1)s →ndk(n+1)p transitions.