Dirac R-matrix calculations of photoionization cross sections of Ni XII and atomic structure data of Ni XIII

Nazir R T^†, Bari M A, Bilal M, Sardar S, Nasim M H, Salahuddin M

(color online) Total PI cross sections of two levels from of Ni XII. The excitation threshold positions are labeled according to Table 1. (a) Comparison of total PI cross sections in length and velocity forms for the ground state , (b) total PI cross sections of the first metastable state .