Visualizing the Coupling between Red and Blue Stark States Using Photoionization Microscopy - Archive ouverte HAL Access content directly
Journal Articles Physical Review Letters Year : 2014

Visualizing the Coupling between Red and Blue Stark States Using Photoionization Microscopy

, (1) , , , , , (1) ,
1
A. S. Stodolna
  • Function : Author
T. Bergeman
  • Function : Author
F. Robicheaux
  • Function : Author
A. Gijsbertsen
  • Function : Author
J. H. Jungmann
  • Function : Author
C. Bordas
M. J. J. Vrakking
  • Function : Author

Abstract

In nonhydrogenic atoms in a dc electric field, the finite size of the ionic core introduces a coupling between quasibound Stark states that leads to avoided crossings between states that would otherwise cross. Near an avoided crossing, the interacting states may have decay amplitudes that cancel each other, decoupling one of the states from the ionization continuum. This well-known interference narrowing effect, observed as a strongly electric field-dependent decrease in the ionization rate, was previously observed in several atoms. Here we use photoionization microscopy to visualize interference narrowing in helium atoms, thereby explicitly revealing the mechanism by which Stark states decay. The interference narrowing allows measurements of the nodal patterns of red Stark states, which are otherwise not observable due to their intrinsic short lifetime.
Fichier principal
Vignette du fichier
PhysRevLett.113.103002.pdf (1.21 Mo) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

hal-02309415 , version 1 (16-02-2021)

Identifiers

Cite

A. S. Stodolna, Franck Lepine, T. Bergeman, F. Robicheaux, A. Gijsbertsen, et al.. Visualizing the Coupling between Red and Blue Stark States Using Photoionization Microscopy. Physical Review Letters, 2014, 113, pp.103002. ⟨10.1103/PhysRevLett.113.103002⟩. ⟨hal-02309415⟩
28 View
40 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More