Publication Date:
2015-09-24
Description:
The photoionization cross-sections of Ti 2+ in the ground state ([Ne]3s 2 3p 6 3d 2 3 F e ) are calculated using both non-relativistic ( LS -coupling) and relativistic (Breit–Pauli) R -matrix methods for the photon energy from 27.49 eV (I.P.) to 48.00 eV. The results show that, in this energy range, the photoionization cross-sections are dominated by resonances 3p 5 3d 3 , 3p 5 3d 2 4d and 3p 5 3d 2 4s, which are labelled by LS -terms by combining with the multiconfiguration Dirac-Fock calculations. Moreover, from the fractional parentage coefficients and the percentages (the square of the configuration interaction expansion coefficients) of the LS -terms involved in the final resonance states, the relative strength of the resonances have been explained qualitatively in a general way. The present results should be of great help in the modelling and diagnostic of astrophysical plasmas as well as laboratory plasmas.
Print ISSN:
0035-8711
Electronic ISSN:
1365-2966
Topics:
Physics
