Atomic Transition Probabilities of Aluminum. A Critical Compilation

Abstract

This compilation is the second in a series of updates to Atomic Transition Probabilities, Sodium through Calcium, published in 1969 by Wiese et al. [Atomic Transition Probabilities, Vol. II, Vol. II: Sodium through Calcium, NSROS-NBS Vol. 2 (U.S. GPO, Washington, D.C., 1969)]. Atomic transition probabilities have been critically evaluated and compiled for about 5000 spectral lines of aluminum (nuclear charge Z=13). The cited values and their estimated uncertainties are based on our consideration of all available theoretical and experimental literature sources. All ionization stages (except for hydrogenic) are covered, and the data are presented in separate tables for each atom and ion. Separate listings are given for “allowed” (electric dipole) and “forbidden” (magnetic dipole plus electric and magnetic quadrupole) transitions. In each spectrum, lines are grouped into multiplets which are arranged in order of ascending lower- and upper-level energies, respectively. For each line, the emission transition probability Aki, the line strength S, and (for allowed lines) the absorption oscillator strength fik are given, together with the spectroscopic designation, the wavelength, the statistical weights, and the energy levels of the lower and upper states. The estimated relative uncertainties of the line strength are also indicated, as are the source citations. We include only those lines whose transition rates are deemed sufficiently accurate to qualify as reference values. Short introductions precede the tables for each ion.

The elemental composition of the Sun

“…Al  transition probabilities have been discussed by Kelleher & Podobedova (2008b). The data for our adopted lines come from theoretical calculations by the OP (Mendoza et al 1995), under the assumption of LS-coupling.…”

3D NLTE analysis of the most iron-deficient star, SMSS0313-6708

“…Electron collisional rates come from open-ADAS 1 (computed as described by Badnell 2011) when possible, including forbidden transitions, and are otherwise computed using Seaton (1962) for allowed transitions. Energy levels and f -values are taken from NIST (Kelleher & Podobedova 2008) when possible, or otherwise the most recent data from Kurucz (Kurucz & Bell 1995). Photoionization cross-sections are again taken from Allende Prieto et al (2003), based on data from TOPbase (Mendoza et al 1995).…”

Transition probabilities and radiative lifetimes of Mg III

“…(continued on next page) λ(nm) [1] This work Other authors 2p 5 3p 1 D 2 170.3108 0.15 0.17 [4] 0.17 [5] 0.20 [6] 1.13 2p 5 3p 1 P 1 173.0778 1.54 1.44 [4] 1.44 [5] 1.44 [6] 0.94 2p 5 3p 3 P 2 174.5009 0.045 0.053 [4] 0.054 [5] 0.061 [6] 1.18 2p 5 3p 3 P 0 175.7888 1.57 2.09 [4] 2.10 [5] 1.99 [6] 1.33 2p 5 3p 3 P 1 176.3805 3.33 3.17 [4] 3.17 [5] 3.11 [6] 0.95 2p 5 3p 1 S 0 249.0534 1.96 1.81 [2] 1.61 [4] 1.50 [6] 0.82 [1] NIST [41] observed; [2] Hibbert et al [23]; [4] Froese Fischer & Tachiev [29]; [5] Kelleher & Podobedova [30]; [6] Jönsson et al [31]. a Theoretical wavelengths obtained from energy levels of Martin & Zalubas [16].…”

“…Afterwards, Hibbert et al [23], Hibbert et al [24], Verner et al [25], Das [26], Verner et al [27], Savukov [28], Froese Fischer and Tachiev [29] calculated oscillator strengths or transition probabilities of some lines of Mg III. Also Kelleher and Podobedova [30] presented a work compiling the different values. Very recently, Jönsson et al [31], published new relativistic calculations including core-core correlations and core-valence effects.…”