Electron Impact Induced Excited-State to Excited-State Transitions in Yb

И.К. Дмитриева, G.I. Plindov

Martin M. Schauer, James R. Danielson, D. Feldbaum +5 more

We report isotope-selective loading and trapping of doubly ionized ytterbium into an rf quadrupole trap. Isotopically pure clouds of $^{174}\mathrm{Yb}$${}^{+}$ ions were first loaded into the rf trap via a multistage photoionization process. The Yb${}^{2+}$ ions were then produced by electron impact ionization of the trapped Yb${}^{+}$ ions. The Yb${}^{2+}$ ions were subsequently detected by rf excitation of their secular motion in the trap, which led to sympathetic heating and changes in the fluorescence of the laser-cooled Yb${}^{+}$ ions. The presence of doubly charged Yb ions was further verified by the appearance of a dark band in the center of Yb${}^{+}$ ion cloud after electron impact ionization. We discuss the possible formation of Yb${}^{2+}$H and similar compounds and the schemes for the direct optical detection of the Yb${}^{2+}$ ions.

Kiril B. Blagoev, V. A. Komarovskii, N. P. Penkin

Y Li, P W Zetner

Superelastic electron scattering from laser-excited 174 Yb is used to measure the L perpendicular to + electron impact coherence parameter for excitation of the 6 3 P 1 level at intermediate impact energies. This is the first application of the superelastic scattering technique to the determination of coherence parameters for excitation of an atomic level in which spin-orbit coupling plays a non-negligible role.

N.A. Bonch-Osmolovskaya, V. A. Morozov, V.I. Stegajlov

E. V. Vidolova-Angelova, Л. Н. Иванов, E. P. Ivanova +1 more