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Current issue   Ukr. J. Phys. 2015, Vol. 60, N3, p.225-231
doi:10.15407/ujpe60.03.0225    Paper

Gomonai A.I.

Institute of Electron Physics, Nat. Acad. of Sci. of Ukraine
(21, Universytets’ka Str., Uzhgorod 88017, Ukraine; e-mail: alekgomonai@gmail.com)

Autoionizing Resonances in Three-Photon Ionization Spectrum of the Ytterbium Atom

Section: Atoms and molecules
Original Author's Text: Ukrainian

Abstract: The three-photon ionization spectrum of ytterbium atoms in the interval 16814.4 – 18100.0 cm-1 has been studied. In addition to the resonance maxima related to the one- and two-photon excitations of bound states, the maxima originated from the three-photon excitation of autoionizing states are observed. Two new odd autoionizing levels with energies of 51866.1 and 51914.1 cm-1 are discovered.

Key words: ytterbium, three-photon ionization, autoionizing level.