https://doi.org/10.1007/s100530050556
Doubly excited states in the negative hydrogen ion
Atomfysik, Stockholms Universitet, Frescativägen 24, 104 05 Stockholm, Sweden
Received:
10
March
1999
Revised:
18
October
1999
Published online: 15 June 2000
We present a detailed analysis of doubly excited resonances in H-
of both 
and 
symmetry. Both resonance positions and
total widths for auto-detachment are calculated using complex coordinate
scaling in a Sturmian-type basis in perimetric coordinates. The
resonances are classified by approximate quantum numbers with help
of their Lewis structures. For the first time, a new class of
shape resonances is reported which can be understood as resulting from
couplings between different adiabatic potentials with both binding and
repulsive character. In addition, we present an analysis of the so
called mass polarisation term which gives rise to specific isotope shifts.
PACS: 31.15.Ar – Ab initio calculations / 31.50.+w – Excited states / 32.80.Dz – Autoionization
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000
