Autoionizing states of the ytterbium atom by three-photon polarization spectroscopy

Abstract

The autoionizing states of ytterbium (Yb) were investigated by three-photon polarization spectroscopy. Ytterbium atoms were excited to autoionizing states through the transition 6s 'So -6s6p P, 4f' -( F7/2)6s 6p3/2 (J =2). The total angular momenta J of the autoionizing states were identified by comparing the line intensities from the spectra recorded with different combinations of the laser polarization. In this work, 17 autoionizing states including many new ones were investigated. For all these states Fano parameters and Jvalues are measured. PACS number(s): 32.80.Dz, 32.80.Fb, 32.70.Jz

Theoretical Spectroscopy of Rare-Earth Elements: Spectra and Autoionization Resonances

“…This fact in principle largely explains unusual and very rich physics of the AS in the lanthanide (rare-earth) atoms. Furthermore in Tables 6 and 7 [24,25] and references therein).…”

“…In Refs. [24,25], the methods of twophoton ionization and three-photon polarization spectroscopy have been applied to studying the autoionization states (ASs) of the ytterbium atom. The ytterbium atom in the 6s 21 S 0 ground state was excited to the 6s6p 3 P 1 excited state by a photon with a visible wavelength (555.648 nm), and it was ionized by absorbing an ultraviolet photon with a wavelength of 260-285 nm.…”

Energies, Landé Factors, and Lifetimes for Some Excited Levels of Neutral Ytterbium (Z = 70)

“…Aymar and co-workers presented theoretical analysis of highly excited levels of Yb, and investigated high-lying odd-parity levels Yb I by the method of selective three--step laser spectroscopy [23,24]. The interchannel interaction between single excitation from 4f 14 and double excitation from 6s 2 in Yb I was reported by Baig and Connerade [25]. Eliav et al calculated transition energies of ytterbium using the relativistic coupled-cluster method [26].…”

“…Maeda et al studied optical-microwave double-resonance spectroscopy of * corresponding author; e-mail: lozdemir@sakarya.edu.tr highly excited Rydberg states of ytterbium [13]. Yi and co-workers investigated autoionizing states of ytterbium atom [14,15]. Baig et al reported innershell and double excitation spectrum of ytterbium involving the 4f and 6s subshells [16].…”

Transition Energies of Ytterbium (Z=70)

“…Optical-microwave double-resonance spectroscopy of highly excited Rydberg states of ytterbium was studied by Maeda et al [13]. Yi and co-workers [14,15] investigated autoionizing states of the ytterbium atom. Baig et al [16] reported inner shell and double excitation spectra of ytterbium involving the 4f and 6s subshells.…”