The first rotationally resolved high resolution excitation spectrum of RbCs is obtained near 520 nm by resonance enhanced two photon ionization study. The excited electronic state is assigned to the 5 1Σ+ state by the spectrum analysis and comparison with ab initio calculations. The spectroscopic constants of the 5 1Σ+ state are determined to be Te=18 564.560(76) cm−1,ωe=39.193(25)cm−1,Re=4.951(5) Å. The Rydberg–Klein–Rees potential curve is constructed and compared with theoretical calculations. Avoided crossings between the 5 1Σ+ and 6 1Σ+ states of RbCs are observed.

1.
R.
Ferber
,
E. A.
Pazyuk
,
A. V.
Stolyarov
,
A.
Zaitsevskii
,
P.
Kowalczyk
,
H.
Chen
,
H.
Wang
, and
W. C.
Stwalley
,
J. Chem. Phys.
112
,
5740
(
2000
).
2.
C.
Amiot
,
J. Mol. Spectrosc.
203
,
126
(
2000
).
3.
S.
Kasahara
,
C.
Fujiwara
,
N.
Okada
,
H.
Katô
, and
M.
Baba
,
J. Chem. Phys.
111
,
8857
(
1999
).
4.
D.
Pavolini
,
T.
Gustavsson
,
F.
Spiegelmann
, and
J.-P.
Daudey
,
J. Phys. B
22
,
1721
(
1989
).
5.
M.
Raab
,
G.
Höning
,
W.
Demtröder
, and
C. R.
Vidal
,
J. Chem. Phys.
76
,
4370
(
1982
).
6.
B.
Kim
,
J. Chem. Phys.
99
,
5677
(
1993
).
7.
B.
Kim
,
K.
Yoshihara
, and
S.
Lee
,
Phys. Rev. Lett.
73
,
424
(
1994
).
8.
Y.
Lee
,
Y.
Yoon
,
S.
Baek
,
D.
Joo
,
J.
Ryu
, and
B.
Kim
,
J. Chem. Phys.
113
,
2116
(
2000
).
9.
J. M.
Walter
and
S.
Barratt
,
Proc. R. Soc. London, Ser. A
119
,
257
(
1928
).
10.
F. W.
Loomis
and
P.
Kusch
,
Phys. Rev.
46
,
292
(
1934
).
11.
P.
Kusch
,
Phys. Rev.
49
,
218
(
1936
).
12.
H.
Katô
and
H.
Kobayashi
,
J. Chem. Phys.
79
,
123
(
1983
).
13.
T.
Gustavsson
,
C.
Amiot
, and
J.
Vergès
,
Chem. Phys. Lett.
143
,
101
(
1988
).
14.
T.
Gustavsson
,
C.
Amiot
, and
J.
Vergès
,
Mol. Phys.
64
,
279
(
1988
).
15.
T.
Gustavsson
,
C.
Amiot
, and
J.
Vergès
,
Mol. Phys.
64
,
293
(
1988
).
16.
B.
Kim
and
K.
Yoshihara
,
Chem. Phys. Lett.
212
,
271
(
1993
).
17.
B.
Kim
and
K.
Yoshihara
,
J. Chem. Phys.
100
,
1849
(
1994
).
18.
C. E.
Fellows
,
R. F.
Gutterres
,
A. P. C.
Campos
,
J.
Vergès
, and
C.
Amiot
,
J. Mol. Spectrosc.
197
,
19
(
1999
).
19.
RKR1, a computer program implementing the first-order RKR method for determining diatom potential energy curves from spectroscopic constants, R. J. Re Loy, University of Waterloo Report, Chemical Physics Research Report, CP-425, 1992.
20.
I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu, Quantities, Units and Symbols in Physical Chemistry (IUPAC, Blackwell, Oxford, 1993).
21.
Handbook of Chemistry and Physics, edited by D. R. Lide (CRC, Boca Raton, FL, 1998).
22.
LEVEL 7.2, a computer program solving the radial Schrödinger equation for bound and quasibound levels, and calculating various expectation values and matrix elements, R. J. Le Roy, University of Waterloo Report, Chemical Physics Research Report, CP-555, 1995.
23.
J. M.
Hutson
,
J. Phys. B
14
,
851
(
1981
).
24.
See EPAPS Document No. E-JCPSA6-114-007118 for 26 pages of absolute line positions.
This document may be retrieved via the EPAPS homepage (http://www.aip.org/pubservs/epaps.html) or from ftp.aip.org in the directory/epaps/. See the EPAPS homepage for more information.
25.
G. Herzberg, Spectra of Diatomic Molecules, 2nd ed. (Krieger, Malabar, FL, 1989).
26.
W. Lee, S. J. Park, and Y. S. Lee (private communication).
27.
A. R.
Allouche
,
M.
Korek
,
K.
Fakherddin
,
A.
Chaalan
,
M.
Dagher
,
F.
Taher
, and
M.
Aubert-Frécon
,
J. Phys. B
33
,
2307
(
2000
).
28.
Y. Yoon, Y. Lee, and B. Kim (unpublished).
This content is only available via PDF.

Supplementary Material

You do not currently have access to this content.