Accurate calculation of oscillator strengths for Cl II lines using non-orthogonal wavefunctions*
Department of Physics, Clark Atlanta University, Atlanta, GA 30314, USA
Received:
29
June
2004
Accepted:
5
July
2004
Non-orthogonal orbitals technique in the multiconfiguration Hartree-Fock approach
is used to calculate oscillator strengths and transition probabilities for allowed
and intercombination lines in Cl II. The relativistic corrections are included
through the Breit-Pauli Hamiltonian. The Cl II wave functions show strong term
dependence. The non-orthogonal orbitals are used to describe the term dependence
of radial functions. Large sets of spectroscopic and correlation functions are
chosen to describe adequately strong interactions in the 
,
and 
Rydberg series and to properly account for the important
correlation and relaxation effects. The length and velocity forms of oscillator strength
show good agreement for most transitions. The calculated radiative lifetime for
the 
state is in good agreement with experiment.
Key words: atomic data / atomic processes / line: formation
© ESO, 2004