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References and Notes for Argon ( Ar )


      FW96      J. R. Fuhr and W. L. Wiese, NIST Atomic Transition Probability Tables, CRC Handbook of Chemistry & Physics, 77th Edition, D. R. Lide, Ed., CRC Press, Inc., Boca Raton, FL (1996). 

      M03       D. C. Morton, Astrophys. J. Suppl. Ser. 149, 205 (2003). 

      M60b      L. Minnhagen, Ark. Fys. 18, 97 (1960). We have increased Minnhagen's 1960 value for the Ar II ionization energy by 0.1 cm-1, in accordance with his redetermination of the connection between the excited levels and the ground level [M71]. The uncertainty of the ionization energy is probably about 1.0 cm-1.

      M71       L. Minnhagen, J. Opt. Soc. Am. 61, 1257 (1971). 

      M73       L. Minnhagen, J. Opt. Soc. Am. 63, 1185 (1973). Minnhagen gave values of the Ar I excited levels with up to four decimal places to exhibit their relative accuracies; his estimated uncertainty for the connection of the excited levels to the 1S0 ground level was 0.05 cm-1. This connection has recently been determined within an estimated uncertainty of 0.003 cm-1 [VHU99]. The resulting correction to the levels given by Minnhagen with respect to the ground level is only +0.0053(30) cm-1. We have made this adjustment to the levels given here and have also made corresponding small adjustments for the tabulated Ritz wavelengths (867 - 1067 Å). The estimated uncertainties of most of the five-place wavelengths are 0.00003 to 0.00004 Å.

      N73       G. Norlén, Phys. Scr. 8, 249 (1973). 

      RCWM80    J. Reader, C. H. Corliss, W. L. Wiese, and G. A. Martin, Natl. Stand. Ref. Data Ser., Natl. Bur. Stand. (U.S.) 68 (1980). 

      VHU99     I. Velchev, W. Hogervorst, and W. Ubachs, J. Phys. B 32, L511 (1999). These authors determined the wavenumber corresponding to the Ar I resonance transition at 1048 Å separately for each of the three isotopes. We have used the isotopically weighted value 95399.8329(30) cm-1 for this separation.

      VVF96     D. A. Verner, E. M. Verner, and G. J. Ferland, At. Data Nucl. Data Tables 64, 1 (1996). 

      WACB95    W. Whaling, W. H. C. Anderson, M. T. Carle, J. W. Brault, and H. A. Zarem, J. Quant. Spectrosc. Radiat. Transfer 53, 1 (1995).K The uncertainty of these Ar II levels with respect to the 3s23p5 2P° ground-term levels is about 0.04 cm-1 [M71].

      YKH85     C. Yamada, H. Kanamori, and E. Hiroita, J. Chem. Phys. 83, 552 (1985). These authors determined the Ar II 3s23p5 2P° ground-term level separation within a stated uncertainty of 0.0007 cm-1.