Tj. Slotterback et al., HYPERFINE ANALYSIS OF THE MIXED A(3)PI(1) V=28 AND X(1)SIGMA(-CL-35()V=69 STATES OF (ICL)), The Journal of chemical physics, 103(21), 1995, pp. 9125-9131
The A (3) Pi(1), v=28 state of (ICl)-Cl-35 is known from previous stud
ies to be strongly mixed with v=69 of the X (1) Sigma(+) state. Spectr
a of both these mixed states are taken at high resolution to allow acc
urate measurement of the hyperfine splittings due to the iodine nucleu
s. The hyperfine structure in both parity components of the A state is
found to be perturbed, though the common rotational-electronic induce
d mixing should only affect the e components. Detailed analysis shows
that hyperfine terms in the Hamiltonian also contribute significantly
to the rovibronic state mixing. A Hamiltonian for these states is desc
ribed that accounts for the hyperfine structure in both the A and X st
ates to within the observed linewidth. The hyperfine parameters of thi
s Hamiltonian, including the perturbation parameters, can be accounted
for semi-quantitatively in terms of a separated atom model. (C) 1995
American Institute of Physics.