UVSOR Lunch Seminar (2004-08)

Date&Time: February 16th, 12:00-12:35
Place: UVSOR Build. #304 (User's room)

Speaker: Dr. Francis PENENT

Affiliation: Laboratoire Chimie Physique Matiere et Rayonnement (LCP-MR)
Universite Pierre et Marie Curie, Paris

Title: Fluorescence from doubly excited states of Helium


Abstract:The doubly excited states of He where one electron is excited in
the N=2 level and the other one to a Rydberg orbital are embedded in the
ionization continuum and were believed to decay essentially by
autoionization. It is only recently that the importance of the competing
fluorescence decay path was discovered. Its study draws light on the
spectroscopy of these states, on their lifetimes, on the formation of
'forbidden' triplet doubly excited states and on the strong correlation
between the 2 excited electrons.