Multiconfiguration Hartree-Fock results with Breit-Pauli corrections for forbidden transitions in the2p4configuration

Radiative transition probabilities in the O-like sequence

“…This allows to take into account with greater accuracy the interactions between different configurations and improve the results. Therefore, in our comparison, we will focus mostly on recent, sophisticated calculations, where available; we will also consider the comprehensive computations by Chang et al (1979) and Froese Fischer & Saha (1983), given the accuracy of the approximations adopted in these works. Table 2 compares energy levels obtained in the present calculations (ab initio results from the 24-configuration model) with the observed ones, and with those obtained by other calculations: Cheng et al (1979), Tachiev & Froese Fischer (2002), Vilkas et al (1994) and Zhang & Sampson (2002) Tachiev & Froese Fischer (2002) and Vilkas et al (1994) provide closer agreement with observations than those from Cheng et al (1979) and the present work.…”

“…Galavis et al (1997) provided radiative transition probabilities for forbidden transitions within the ground configuration of the O-like sequence up to Ni. A similar calculation was carried out by Froese Fischer & Saha (1983), Baluja & Zeippen (1988) and Vilkas et al (1994): the latter two datasets however considered only the most abundant elements up to Ni. Calculations limited to a few ions between Z = 26 and Z = 36 have been reported by Feldman et al (1985); Bhatia et al (1979) published data for Si , S  and Ar  only, while Bhatia et al (1980) and Bhatia (1982) considered only O-like Ti and Mn, respectively.…”

O(1S → 1D,3P) branching ratio as measured in the terrestrial nightglow

“…The vibrational distribution for the Herzberg I system has been investigated numerous times, [Condon, 1934] 11.1 [Pasternack, 1940] 24.4 [Garstang, 1951] 16.4 [Yamanouchi and Horie, 1952] 30.4 [Garstang, 1956] 17.6 [Fischer and Saha, 1983] 13.6 [Baluja and Zeippen, 1988] 13.0 [Galavis et al, 1997] 14.2 [Fischer and Tachiev, 2004] 16.1 Current NIST recommendation a 16.7…”

Contribution to the theoretical investigation of electron and photon interaction with carbon atom and its ions

“…Detailed structure calculations have been reported for the astrophysically important transitions [1][2][3][4]. More extensive theoretical and experimental reported works exist for the carbon ions.…”

“…We report a new set of R-matrix calculation intended specifically to investigate the role of including configuration interaction (CI) wave functions both in the target state expansion and in the (N+1)-electron quadratically integrable function expansion. Target-atom states were computed using the Hartree-Fock ground configuration 2s 2 2p 2 plus the near-degenerate configurations 2s2p 3 and 2p 4 . In addition, for consistency with the virtual excitation pattern used for scattering wave functions, all virtual excitations of 2s 2 2p…”