Measurements of the ground-state ionization energy and wavelengths for the 1snp P-1(1)*-1s(2) S-1(0) (n=4-9) lines of Mg XI and FVIII

作者：Pal'chikov VG^*; Faenov AY^*; Skobelev IY^*; Magunov AI^*; Pikuz TA; Rosmej FB; Hoffmann DHH; Suss W; Geissel M; Biemont E; Quinet P; Palmeri P; Sasaki A; Utsumi T

来源：Journal of Physics B: Atomic, Molecular and Optical Physics , 2002, 35(12): 2741-2754.

DOI：10.1088/0953-4075/35/12/310

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.

• 出版日期2002-6-28