[en] The wavelengths of the 1snp P-1(1)0-1s(2) S-1(0) transitions in the He-like Mg XI (n = 4-9) and F VIII (n = 4-8) have been measured in laser-produced plasmas. The accuracy of the present measurements (0.4-1.6 mAngstrom) is a large improvement over previous results. The Rydberg series is used to determine the ground-state ionization energy of F VIII and Mg XI: E-ion (F VIII) = 953.96 +/- 0.11 eV, E-ion (Mg XI) = 1761.88 +/- 0.15 eV. These experimental results are compared with theoretical data calculated by the 1/Z-expansion method and the HFR and MCDF approaches. Fairly good agreement between theory and experiment is observed with a precision up to 5 x 10(-5). Radiative corrections to the 1s(2) S-1(0) state are analysed and compared with experiments. It is found that QED corrections to the ground-state ionization energy are significant at the present level of experimental accuracy.
Abdallah J. Jr. J. Quant. Spectrosc. Radiat. Transfer 1999, 62:85.
Accad Y., Pekeris C.L., Schiff B. Phys. Rev. A 1971, 4:516.
Bartnik A. J. Phys. B: At. Mol. Opt. Phys. B 1997, 30:4453.
Biémont E., Quinet P. Phys. Rev. Lett. 1998, 81:3345.
Biémont E., Dutrieux J.-F., Martin I., Quinet P. J. Phys. B: At. Mol. Opt. Phys. 1998, 31:3321.
Biémont E., Li Z.S., Palmeri P., Quinet P. J. Phys. B: At. Mol. Opt. Phys. 1999, 32:3409.
Biémont E., Frémat Y., Quinet P. At. Data Nucl. Data Tables 1999, 71:117.
Boiko V.A., Pal'chikov V.G., Skobelev I.Yu., Faenov A.Ya. Spectroscopic Constants of Atoms and Ions (Spectra of Atoms with One and Two Electrons, New York: Chemical Rubber Company; 1994.
Cowan R.D. The Theory of Atomic Structure and Spectra, Berkeley, CA: University of California Press; 1981.
Crawford M.F., McLay A.B. Proc. R. Soc. A 1934, 143:540.
Drake G.W.F. Phys. Rev. A 1979, 19:1387.
Drake G.W.F. Adv. At. Mol. Phys. 1982, 18:399.
Drake G.W.F. J. Phys. B: At. Mol. Phys. 1983, 16.
Drake G.W.F. Can. J. Phys. 1988, 66:586.
Drake G.W.F., private communication; 2000.
Drake G.W.F., Goldman S.P. Can. J. Phys. 1999, 77:835.
Ermolaev A.M., Jones M. J. Phys. B: At. Mol. Phys. 1974, 7:199.