https://doi.org/10.1007/s100530050330
Doubly excited triplet states of highly stripped ions
1
Department of Spectroscopy, Indian Association for the Cultivation of Science, Jadavpur,
Calcutta 700032, India
2
Department of Chemistry, University of New Brunswick, Fredericton, NB, Canada E3B 6E2
Received:
21
December
1998
Revised:
22
February
1999
Published online: 15 July 1999
Transition energies, Coulomb repulsions and effective quantum numbers have been calculated
for the doubly excited Nsnp: 
(for N = 2, 
); Nsnd: 
(for N =
2, 
) and Npnd: 
(for N = 2, ) states for the highly
stripped ions 
, 
, 
, 
, 
and
. Time-dependent perturbation theory has been applied to calculate such transitions
properties. A time-dependent harmonic perturbation causes simultaneous excitation of both the
electrons with a change of spin state. The doubly excited energy levels and the analytic
representation of their wave functions are obtained by identifying the poles of an appropriately
constructed linearized variational functional with respect to driving frequency. Most of the results
are new. The transition energies and effective quantum numbers of 2s2p: states of all the
ions agree well with the only available experimental data.
PACS: 31.50.+w – Excited states / 32.80.Dz – Autoionization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
