19. March 2024, 16:00 until 17:00

Matthias Werl, Institute of Applied Physics TU Wien, Vienna, Austria

Seminar

Hollow atoms: A simulation approach to describe the formation and de-excitation of multiply excited atoms

Hollow atoms are formed when (highly) charged ions approach a surface: Here, electrons are (resonantly) captured from the surface, populating states in the projectiles with very high principal quantum numbers. Studying exotic hollow atoms is challenging, because they de-excite quickly, typically via radiative and auto- ionisation pathways. The exact lifetime is, however, not easily estimated. A code to simulate both the formation and the subsequent de-excitation of the HA is presented here. Using coupled rate equations with rates computed using atomic structure codes, it is possible to resolve the dynamics of the de-excitation cascade, giving access to the spectra of emitted photons and electrons as well as being able to determine the life-time of freely decaying hollow atoms.

Calendar entry

Event location

SEM.R. DB gelb 05 B
1040 Wien
Wiedner Hauptstraße 8-10/E134

 

Organiser

IAP
Manuela Marik
marik@iap.tuwien.ac.at

 

Public

Yes

 

Entrance fee

No

 

Registration required

No