Experimental Stark Widths and Shifts for Spectral Lines of Neutral and Ionized Atoms „A Critical Review of Selected Data for the Period 1989 Through 2000… N. Konjevic´ Institute of Physics, P.O. Box 68, 11081 Belgrade, Yugoslavia A. Lesage Observatoire de Paris–Meudon, 92195 Meudon Cedex, France J. R. Fuhra… and W. L. Wiese National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899 ͑Received 12 October 2001; accepted 18 January 2002; published 12 September 2002͒ A critical review of the available experimental data on Stark widths and shifts for spectral lines of nonhydrogenic neutral atoms and positive ions has been carried out. The review covers the period from 1989 through the end of 2000 and represents a continua- tion of earlier critical reviews up to 1988. Data tables containing the selected experimen- tal Stark broadening parameters are presented with estimated accuracies. Guidelines for the accuracy estimates, developed during the previous reviews, are summarized again. The data are arranged according to elements and spectra, and these are presented in alphabetical and numerical order, respectively. A total of 77 spectra are covered, and the material on multiply charged ions has significantly increased. Comparisons with compre- hensive calculations based on semiclassical theory are made whenever possible, since the comparison with theory has often been a principal motivation for the experiments. © 2002 by the U.S. Secretary of Commerce on behalf of the United States. All rights reserved. Key words: critically evaluated data; full width at half maximum intensity; neutral atoms; positive ions; Stark broadening parameters; Stark shifts; Stark widths. Contents Argon............................... 828 ArI.......................... 828 ArII......................... 834 1. Introduction................................ 820 ArIII......................... 843 2. General Discussion of Our Evaluation Procedure.. 821 ArIV......................... 844 3. Comparisons with Theory.................... 822 Boron............................... 845 4. Arrangement of the Tables.................... 823 BI........................... 845 5. Summary and Conclusions.................... 823 BII.......................... 845 6. Acknowledgments.......................... 824 BIII......................... 846 7. References................................. 824 Bromine............................. 847 Appendix A: Principal Properties and BrI.......................... 847 Specifications of the Plasma Sources Applied. 825 BrII......................... 848 Appendix B: Advanced Procedures for the Br III. ........................ 848 Deconvolution of Line Profiles................ 826 BrIV......................... 849 Cadmium............................ 850 8. Tables of Stark Widths and Shifts. ............. 827 CdII......................... 850 Aluminum........................... 827 Calcium............................. 850 AlII......................... 827 CaII......................... 850 Al III. ........................ 827 Carbon.............................. 851 CI........................... 851 ͒ CII.......................... 852 a Electronic mail: [email protected] © 2002 by the U.S. Secretary of Commerce on behalf of the United States. CIII......................... 855 All rights reserved. CIV......................... 856 Õ Õ Õ Õ Õ 0047-2689 2002 31„3… 819 109 $35.00819 J. Phys. Chem. Ref. Data, Vol. 31, No. 3, 2002 820 KONJEVIC´ ET AL. Chlorine............................. 857 OVI......................... 908 ClI.......................... 857 Silicon.............................. 909 ClII.......................... 858 SiI.......................... 909 ClIII......................... 859 SiII.......................... 910 Copper.............................. 859 SiIII......................... 912 CuI.......................... 859 SiIV......................... 913 CuII......................... 860 Sodium.............................. 914 Fluorine............................. 861 NaI.......................... 914 FI........................... 861 Sulfur............................... 915 FII.......................... 861 SII.......................... 915 FIII.......................... 862 SIII.......................... 916 FIV.......................... 863 Tin................................. 917 FV.......................... 864 SnI.......................... 917 FVII......................... 865 SnII......................... 918 Helium.............................. 865 Xenon. ............................ 919 HeI.......................... 865 XeI.......................... 919 Iodine............................... 868 XeII......................... 920 I I........................... 868 XeIII........................ 923 III........................... 869 Zinc................................ 927 IIII.......................... 870 ZnII......................... 927 Iron................................. 870 List of Figures FeI.......................... 870 2 2 FeII......................... 873 1 Stark widths for the 3s S–3p P° transition of ͑ Krypton............................. 874 lithium-like spectral lines in units of angular ͒ KrI.......................... 874 frequency as a function of log10 Z according to ´ 10 KrII......................... 875 Blagojevic et al. ........................... 821 KrIII......................... 877 2 Ratio of experimental Stark widths to semiclassical calculations as a function of the Lead................................ 879 temperature for the lithium-like 3s 2S–3p 2P° PbI.......................... 879 transition of N V. ........................... 822 PbII......................... 880 3 Ratio of experimental Stark widths to Mercury............................. 881 semiclassical calculations as a function of the HgII......................... 881 temperature for the boron-like 3s 2S–3p 2P° HgIII........................ 882 transition of O IV. .......................... 822 Neon................................ 882 4 Ratio of experimental Stark widths to NeI.......................... 882 semiclassical calculations as a function of the NeII......................... 884 temperature for the boron-like 3s 2S–3p 2P° NeIII........................ 887 transition of N III. .......................... 822 NeIV........................ 888 5 Measured temperature dependence for the NeV......................... 889 halfwidth of the Fe I 5383 Å line. ............ 822 NeVI........................ 889 NeVII........................ 890 1. Introduction Ne VIII....................... 891 Nickel............................... 891 This tabulation is a continuation of a series of critical re- NiI.......................... 891 views and tables on experimental Stark broadening data for NiII......................... 892 spectral lines of nonhydrogenic atoms and ions which we Nitrogen............................. 892 started in 19761,2 and continued in 19843,4 and 1990.5 In this NI........................... 892 new installment, we cover the period from 1989 to the end of NII.......................... 894 2000, and, as in the last review, we have presented the data NIII......................... 898 on atoms and ions in a single set of tables. Generally, we NIV......................... 900 have adhered to the format of our previous reviews, and we NV.......................... 902 have subjected the data again to the same evaluation criteria Oxygen.............................. 902 as those established earlier. OI........................... 902 Our main source of literature references has been the mas- OII.......................... 903 ter file of the Data Center on Atomic Line Shapes and Shifts OIII......................... 906 at the National Institute of Standards and Technology ͑for- OIV......................... 906 merly the National Bureau of Standards͒.6,7 Also, two of the OV.......................... 908 authors have maintained independent searches in the litera- J. Phys. Chem. Ref. Data, Vol. 31, No. 3, 2002 EXPERIMENTAL STARK WIDTHS AND SHIFTS FOR SPECTRAL LINES 821 ture during the entire period. A principal reason for many Stark-broadening experiments is to provide comparisons for theoretical Stark width and shift data. We have therefore also presented comparisons with the generally successful and widely applied semiclassical calculations, similar to our pre- vious reviews. Another reason for such experiments is ͑espe- cially for heavier and higher ionized elements͒ the impor- tance of Stark broadening parameters in stellar atmosphere opacity calculations,8 and in the analysis of dense laboratory plasmas. 2. General Discussion of Our Evaluation Procedure We have evaluated and tabulated the two principal Stark 2 2 FIG. 1. Stark widths for the 3s S–3p P° transition of lithium-like spectral broadening parameters obtained from the experiments: the ͑ ͒ lines in units of angular frequency as a function of log10 Z according to full width of a spectral line at half maximum intensity Blagojevic´ et al.10 The experimental data are scaled linearly to a value of ͑FWHM͒ and the shift of a line, usually determined at peak the electron density of 1017 e/cm3 and to an electron temperature value of ͑ ͒ intensity. But in several cases the shifts are reported for the 87 000 K 7.5 eV using we (Te) dependence from the theoretical data in Ref. 10. Experimental results: ⌬, Glenzer et al.;11 and ᭺, Blagojevic´ et al.10 position of the halfwidth, and this is noted in the tables for Error flags are calculated uncertainties including the