Level-Crossing-Untersuching der Stark-Aufspaltung der tiefsten1 P 1-Terme von Ca, Sr und Ba

Abstract

Level-Crossing Investigation of the Stark-Splitting of the Lowest 1P1-Levels of Ca, Sr, and BaUsing the level-crossing technique, magnitude and sign of the tensor polarizability etch of the lowest 1Pl-levels of Ca, Sr, and Ba have been measured by investigating the splitting into Zeeman-sublevels in superimposed homogeneous electric and magnetic fields. The experimental results are: 0~ten/gj ~---13.6(3) kHz/(kV/cm) 2 for Ca etch/g j= --14.32 (15) The polarizability constants are discussed with regard to the state vectors of the lowest sp aP 1-and 3Pl-levels. The tensor polarizability of the 6s 6p 1Pl-level of Ba I is considered in relation to oscillator strengths of electric dipole transitions to neighbouring levels.

Stark effect in 6s 5d and 5d 6p states in barium measured with laser-atomic-beam spectroscopy

“…The distance between the capacitor plates, designed at 6 mm, was calibrated on the accurately measured [9] tensor polarizability of the first resonance line of barium (6s 2 1So~6S6 p 1p~, at 553.5 nm). From the measured splitting at known voltage and the value of -10.76(10) kHz/(kV/cm) 2 for the tensor polarizability given in [9], we derived a value of 5.94(6) mm, the error being arbitrarily doubled to include possible systematic errors. The polarizabilities were determined by measuring the splitting and displacement in an electric field of the signal from the 13SBa-isotope, which has no hyperfine structure.…”

“…The photomultiplier signal was processed More details of the experimental set-up, excluding the high-voltage capacitor and the metastable beam production, can be found elsewhere [12]. The distance between the capacitor plates, designed at 6 mm, was calibrated on the accurately measured [9] tensor polarizability of the first resonance line of barium (6s 2 1So~6S6 p 1p~, at 553.5 nm). From the measured splitting at known voltage and the value of -10.76(10) kHz/(kV/cm) 2 for the tensor polarizability given in [9], we derived a value of 5.94(6) mm, the error being arbitrarily doubled to include possible systematic errors.…”

“…Optical double resonance has been used by v. Oppen and Piosczyk [8] to determine the tensor polarizabilities of the metastable 6s5d states. Kreutztr~iger et al [9,10] have measured the tensor polarizabilities of the 6s 6p 1P 1 and 3P 1 levels with the level-crossing technique. In the present work laser-atomic-beam spectroscopy has been applied to the accurate determination of the tensor polarizabilities of the 5d 6p ap, 3D, 1p and aF levels, as well as those of the previously studied 6s 5d-states [8].…”

Stark effect investigations of the 4f 14 6s 6p 3 P 1 and1 P 1 levels of ytterbium

“…The result can be compared to the tensor polarizabilities ~ten(P) of the lowest 3p~ and ~P~ levels of Ca, Sr, and Ba [2]. Only for Sr is found an agreement of the two c%n(P ) values which is similar to Yb, whereas for Ca and especially for Ba considerable discrepancies are obtained.…”

Stark Effect in Two-Electron Atoms by High-Resolution Diode-Laser Spectroscopy

“…For Ba, the scalar and tensor polarizabilities of the 6s 2 1 S 0 ground state and some states of the 6s5d, 6s6p, and 5d6p configurations were determined [4][5][6] …”