Energy-level scheme and transition probabilities of Cl-like ions

Fully Relativistic Electron Impact Excitation Cross-Section and Polarization for Tungsten Ions

“…In Table 6, we compare our values with the available measurements and the theoretical results obtained using FAC and GRASP2 by Clementson et al [19] as well as other calculations [19,48-50,53- Table 6, we find that our calculations show an overall good agreement with measurements of Clementson et al [19] and their reported FAC calculations [19] for all the ions. It can further be seen from Table 6 that our values for oscillator strengths are within 5% of the only available MCDF calculations for all the transitions except in case of transitions Cl-1 and Cl-3, where the difference between the two theoretical results is, respectively, 14% and 7% [48][49][50][51]53]. We hope that the forthcoming measurements as well as other better theoretical calculations will provide more meaningful comparisons.…”

“…We calculated the excitation energies and oscillator strengths for these transitions and compared them with the values reported earlier [22,[48][49][50][51][52][53][54][55]. We observed overall good agreement with the experimental and other theoretical results.…”

Radiative rates and electron impact excitation rates for transitions in Cr VIII

“…In Table 4 we compare our f-values from both grasp and fac with the corresponding results of Huang et al (1983), Fawcett (1987), Mohan et al (2005), and Froese Fischer et al (2006), among the lowest 31 levels of Cr VIII, common to all calculations. For all these (and many more) transitions there is a satisfactory agreement between our two sets of f-values from grasp and fac.…”

“…Furthermore, our calculations from fac, which are discussed below and include the 3p 6 4s configuration, do not show any appreciable difference for a majority of levels, including those of 3s 2 3p 4 4s. The other theoretical results available in the literature for the lowest 31 levels of Cr VIII are from the calculations of Huang et al (1983) and Fawcett (1987), who have adopted the multi-configuration Dirac-Fock (MCDF) and Hartree-Fock Relativistic (HFR) codes, respectively. Energy levels of Fawcett are comparable in both magnitude and orderings with those of NIST and our calculations, as may be noted from Table 1.…”

“…Considering the importance of Cr viii, a few calculations have been performed in the past, such as by Huang et al (1983), Fawcett (1987), and more recently by Mohan et al (2005) and Froese Fischer et al (2006). Huang et al adopted the relativistic Dirac-Fock computer code of Desclaux (1975) and calculated energies for the 31 levels of the 3s 2 3p 5 , 3s3p 6 , and 3s 2 3p 4 3d configurations.…”