Excitation of Some Nitrogen-Like Ions: Calculations and Comparison with Measurements

¹ Department of Applied Mathematics, Moscow State Technological University “STANKIN”, RU-127055, Moscow, Russia
² Russian Federal Nuclear Center – All-Russian Scientific Research Institute of Experimental Physics (RFNC-VNIIEF), Sarov, Nizhny Novgorod Region, RU-607188, Russia

^* e-mail: anadykto@gmail.com

Published online: 26 April 2021

Abstract

Electronic energies of one-electron excited states 1s²2s²2p²ns ⁴P, 1s²2s²2p²ns ²P, 1s²2s²2p²np ⁴S, 1s²2s²2p²np ²S, 1s²2s²2p²np ⁴P, 1s²2s²2p²np ²P, 1s²2s²2p²np ⁴D, 1s²2s²2p²np ²D, 1s²2s²2p²nd ⁴P, 1s²2s²2p²nd ²P, 1s²2s²2p²nd ⁴D, 1s²2s²2p²nd ²D, 1s²2s²2p²nd ⁴F, 1s²2s²2p²nd ²F of nitrogen-like ions with n=3-12 and Z=7-50 have been calculated. For all the aforementioned electronic configurations, fine-structure levels have been determined for states with different total momentum J. The comparison of theoretical results with the available experimental data shows that theory and measurements agree well. In particular, relative accuracy of 10^-4 has been achieved in the electronic energy of N-like at Z > 10, while the typical deviation in the calculated fine-structure levels from experimental data is in the order of 10^-2