A Study on the Triply Excited Double Rydberg States of La Atoms

The autoionization distribution of the triply excited double Rydberg states (TEDRS) 5 d 5/2 N Lnl ( N ⩽ 22; n ⩽ 50; L, l < 4) of La has been investigated by using five-laser resonance excitation in combination with a method of sequential ionization by a pulsed electric field and a constant electric field. The experimental results exhibit that the La atoms in TEDRS predominantly single-autoionize to the ionic Rydberg states located in a few Rydberg manifolds. Furthermore, a difference of autoionization mechanisms between TEDRS above and those below the double ionization threshold is found.The autoionization distribution of the triply excited double Rydberg states (TEDRS) 5 d 5/2 N Lnl ( N ⩽ 22; n ⩽ 50; L, l < 4) of La has been investigated by using five-laser resonance excitation in combination with a method of sequential ionization by a pulsed electric field and a constant electric field. The experimental results exhibit that the La atoms in TEDRS predominantly single-autoionize to the ionic Rydberg states located in a few Rydberg manifolds. Furthermore, a difference of autoionization mechanisms between TEDRS above and those below the double ionization threshold is found.

Chinese Physics LettersJun 1, 20003 citations

Study of La^+ Rydberg States and Autoionization States

Wei Sun, Ping Xue, Zhi-Ping Zhong +2 more

The Review of Laser EngineeringNov 15, 19980 citations

Atomic triply excited double Rydberg states of lanthanum investigated by selective laser excitation

Weidong Sun, Panpan Xue, Xiu-Ping Xie +4 more

The atomic triply excited double Rydberg states (TEDRS) of La have been studied both experimentally and theoretically. It is revealed that in such an asymmetric four-body system where three electrons have very different orbital energies, the electronic correlations can be understood by means of decomposing into different dielectronic correlations that play different roles time-dependently. The correlations depend strongly on the relative excited orbital energies of three valence electrons. Our theoretical approach based on a semiclassical model is able to interpret the two observed patterns of ${\mathrm{La}}^{+}$ ion distributions among high Rydberg states resulted from the decay of TEDRS.The atomic triply excited double Rydberg states (TEDRS) of La have been studied both experimentally and theoretically. It is revealed that in such an asymmetric four-body system where three electrons have very different orbital energies, the electronic correlations can be understood by means of decomposing into different dielectronic correlations that play different roles time-dependently. The correlations depend strongly on the relative excited orbital energies of three valence electrons. Our theoretical approach based on a semiclassical model is able to interpret the two observed patterns of ${\mathrm{La}}^{+}$ ion distributions among high Rydberg states resulted from the decay of TEDRS.

Physical Review AAug 13, 20012 citations

Double Rydberg States Formed in Stabilized Triple Electron Capture

Serge Martin, Jérôme Bernard, L. Chen +2 more

Double Rydberg states were populated by triple electron capture in collisions of highly charged ions with atoms. The highest stabilization of states produced by triple capture at $v\ensuremath{\cong}0.2\mathrm{a}.\mathrm{u}.$ was found for binding energies of the projectile electrons near the limits of the $({2,n,n}^{\ensuremath{'}})$ and $({3,n,n}^{\ensuremath{'}})$ series. Population of triply excited double Rydberg states was confirmed by the emission of Rydberg transitions. Results are interpreted by two successive autotransfer into Rydberg states for $({3,n,n}^{\ensuremath{'}})$ states and of one-step two-electron autotransfer for $({2,n,n}^{\ensuremath{'}})$ states.Double Rydberg states were populated by triple electron capture in collisions of highly charged ions with atoms. The highest stabilization of states produced by triple capture at $v\ensuremath{\cong}0.2\mathrm{a}.\mathrm{u}.$ was found for binding energies of the projectile electrons near the limits of the $({2,n,n}^{\ensuremath{'}})$ and $({3,n,n}^{\ensuremath{'}})$ series. Population of triply excited double Rydberg states was confirmed by the emission of Rydberg transitions. Results are interpreted by two successive autotransfer into Rydberg states for $({3,n,n}^{\ensuremath{'}})$ states and of one-step two-electron autotransfer for $({2,n,n}^{\ensuremath{'}})$ states.

Physical Review LettersNov 18, 199612 citations

Study of La+ Rydberg States and Autoionization States.

The Review of Laser EngineeringJan 1, 19980 citations

{\mathrm{La}}^{+}

ion distributions among high Rydberg states resulted from the decay of TEDRS.