The ndσ and ndδ (n=4...9, v=0) triplet Rydberg series of carbon monoxide have been observed for the first time and rotationally resolved with an accuracy of 0.03 cm−1 using a three‐step excitation scheme. A multichannel quantum defect theory (MQDT) analysis shows strong perturbations for n=5, 8, and 9 and predicts the positions of the sσ and dπ levels. There is significant mixing between the sσ and dσ states, with a mixing angle between 42 and 45 degrees, as well as some smaller interaction with the np series. The ionization limit for CO is found to be 113 027.5(3) cm−1.

1.
M.
Eidelsberg
and
F.
Rostas
,
Astron. Astrophys.
235
,
472
(
1990
).
2.
M.
Eidelsberg
,
J. J.
Benayoun
,
Y.
Viala
,
F.
Rostas
,
P. L.
Smith
,
K.
Yoshino
,
G.
Stark
, and
C. A.
Shettle
,
Astron. Astrophys.
265
,
839
(
1992
).
3.
F.
Rostas
,
F.
Launay
,
M.
Eidelsberg
,
M.
Benharrous
,
C.
Blaess
, and
K. P.
Huber
,
Can. J. Phys.
72
,
913
(
1994
).
4.
P. F.
Levelt
,
W.
Ubachs
, and
W.
Hogervorst
,
J. Chem. Phys.
97
,
7160
(
1992
).
5.
M.
Drabbels
,
J.
Heinze
,
J. J.
ter Meulen
, and
W. L.
Meerts
,
J. Chem. Phys.
99
,
5701
(
1993
).
6.
K. S. E.
Eikema
,
W.
Hogervorst
, and
W.
Ubachs
,
Chem. Phys.
181
,
217
(
1994
).
7.
E. F.
van Dieshoek
and
J. H.
Black
,
Astrophys. J.
334
,
771
(
1988
).
8.
T.
Ebata
,
N.
Hosoi
, and
M.
Ito
,
J. Chem. Phys.
97
,
3920
(
1992
).
9.
M.
Komatsu
,
T.
Ebata
, and
N.
Mikami
,
J. Chem. Phys.
99
,
9350
(
1993
).
10.
M.
Komatsu
,
T.
Ebata
,
T.
Maeyama
, and
N.
Mikami
,
J. Chem. Phys.
103
,
2420
(
1995
).
11.
G. H.
Dieke
and
J. W.
Mauchly
,
Phys. Rev.
43
,
12
(
1933
).
12.
M. L.
Ginter
and
S. G.
Tilford
,
J. Mol. Spectrosc.
31
,
292
(
1969
).
13.
T.
Rytel
,
J. Mol. Spectrosc.
145
,
420
(
1991
).
14.
I.
Dabrowski
,
M.
Vervloet
, and
D.-C.
Wang
,
Can. J. Phys.
65
,
1171
(
1987
).
15.
A.
Mellinger
and
C. R.
Vidal
,
J. Chem. Phys.
101
,
104
(
1994
).
16.
J.
Mazeau
,
C.
Schermann
, and
G.
Joyez
,
J. Electron Spectrosc.
7
,
269
(
1975
).
17.
B.
Wallbank
,
S.
Daviel
,
J.
Comer
, and
P.
Hicks
,
J. Phys. B
16
,
3065
(
1983
).
18.
P.
Hammond
,
G. C.
King
,
J.
Jureta
, and
F. H.
Read
,
J. Phys. B
18
,
2057
(
1985
).
19.
S.
Ogawa
and
M.
Ogawa
,
J. Mol. Spectrosc.
49
,
454
(
1974
).
20.
P.
Klopotek
and
C. R.
Vidal
,
J. Opt. Soc. Am. B
2
,
869
(
1985
).
21.
A.
Mellinger
and
C. R.
Vidal
,
Chem. Phys. Lett.
238
,
31
(
1995
).
22.
C. R. Vidal, in Tunable Lasers, Vol. 59 in Topics in Applied Physics edited by L. F. Mollenauer and J. C. White (Springer, Berlin, 1987), pp. 57–113.
23.
B.
Steffes
,
X.
Li
,
A.
Mellinger
, and
C. R.
Vidal
,
Appl. Phys. B
62
,
87
(
1996
).
24.
K. H.
Strobl
and
C. R.
Vidal
,
J. Chem. Phys.
86
,
62
(
1987
).
25.
S. Gerstenkorn and J. Cariou, Atlas du spectre d’absorption de la molécule d’iode, CNRS report, 1978.
26.
M. J.
Seaton
,
Rep. Prog. Phys.
46
,
167
(
1983
).
27.
C. H. Greene and Ch. Jungen, in Advances in Atomic Molecular Physics, edited by D. Bates and B. Bederson (Academic, New York, 1985), Vol. 21, pp. 55–121.
28.
S. C.
Ross
and
Ch.
Jungen
,
Phys. Rev. A
49
,
4364
(
1994
).
29.
A. Mellinger, E. G. Rohwer, and C. R. Vidal (to be published).
30.
T.
Rytel
and
M.
Rytel
,
Act. Phys. Hungar.
55
,
69
(
1984
).
31.
C.
Effantin
,
F.
Michaud
,
F.
Roux
,
J.
D’Incan
, and
J.
Verges
,
J. Mol. Spectrosc.
92
,
349
(
1982
).
32.
M.
Momona
,
H.
Kanamori
, and
K.
Sakurai
,
J. Mol. Spectrosc.
159
,
1
(
1993
).
33.
I. Kovács, Rotational Structure in the Spectra of Diatomic Molecules (Hilger, London, 1969).
34.
C.
Bauschlicher
Jr.
,
S.
Langhoff
, and
H.
Partridge
,
J. Chem. Phys.
98
,
8785
(
1993
).
35.
T. Ebata (private communication).
36.
M.
Ogawa
and
S.
Ogawa
,
J. Mol. Spectrosc.
41
,
393
(
1972
).
37.
W.
Kong
,
D.
Rodgers
, and
J. W.
Hepburn
,
J. Chem. Phys.
99
,
3159
(
1993
).
38.
C.
Haridass
,
C. V. V.
Prasad
, and
S. P.
Reddy
,
Astrophys. J.
388
,
669
(
1992
).
39.
Ch.
Jungen
,
J. Chem. Phys.
11
,
4168
(
1970
).
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