AMS Research Center, Southeast University,
Nanjing
210096, China; Theoretical and Physical Chemistry Institute, National
Hellenic Research Foundation,
Vasileos Constantinou 48,
GR-11635 Athens, Greece
Abstract:
This paper develops a Fortran code which is capable to construct
the simplest LS eigenfunctions for desired symmetry and determine
all permitted atomic LS spectral terms under a given orbital
occupancy by implementing and extending the Schaefer and Harris
method. Examples (in some cases the most complete set to date) of
multiple spectroscopic terms of LS coupling of atomic states for
both non-equivalent and equivalent electronic configurations are
given. It also corrects a few observed errors from the recent
literature.