Vertical excitation energie
s belonging to
some different Rydberg
serie
s of hydrogen chloride have beendetermined with a coupled-clu
ster theoretical approach. The
se excitation energie
s have allowed u
s to calculateelectric dipole tran
sition inten
sitie
s in HCl and allow additional a
sse
ssment of the calculation approach pre
sentlyu
sed to provide an adequate de
scription of the valence and Rydberg
state
s of HCl. The molecular quantumdefect orbital ha
s been applied to the calculation of o
scillator
strength
s. In particular, new in
sight i
s given onthe a
ssignment of
state
s a
s the R
1![](/image<font color=)
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1![](/image<font color=)
s/gifchar
s/Delta.gif" BORDER=0 >(4d
![](/image<font color=)
s/gifchar
s/pi.gif" BORDER=0 > and 5p
![](/image<font color=)
s/gifchar
s/pi.gif" BORDER=0 >), the
1![](/image<font color=)
s/gifchar
s/Sigma.gif" BORDER=0 >
+(4d
![](/image<font color=)
s/gifchar
s/pi.gif" BORDER=0 >), and the
nd
![](/image<font color=)
s/gifchar
s/delta.gif" BORDER=0 >(
1![](/image<font color=)
s/gifchar
s/Pi.gif" BORDER=0 >,
1![](/image<font color=)
s/gifchar
s/Phi.gif" BORDER=0 >) and 4f
state
s.