Eric A. Rohlfing and J. E. M. Goldsmith, "Stimulated-emission pumping spectroscopy of jet-cooled C3: antisymmetric stretch–bend levels," J. Opt. Soc. Am. B 7, 1915-1923 (1990)
We present a study of jet-cooled C3 in which stimulated-emission pumping spectroscopy is used to probe rovibrational levels at energies up to 8930 cm−1 in the ground state. Stimulated-emission pumping spectra are reported for pump bands in the
system and for dump transitions that terminate in the bending progressions of states with two and four quanta of antisymmetric stretch. These spectra are used to determine the rovibrational term energies over the range J = 2 to J = 12 for the antisymmetric stretch–bend levels, 0υ2 (υ = 0 to υ = 8) and 0υ4 (υ = 0 to υ = 14). These data clearly illustrate that the effective bending potentials in the 002 and the 004 states have substantial barriers to linearity.
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Notation for bending levels given in bent (υb, K) and linear (υ, l) notations.
Even and odd J levels correspond to different l(K)-type doublets.
Energies relative to the 002 J = 2 level at 4038.2(5) cm−1.
Table 2
Rovibrational Term Energies (cm−1) for 0υ4 Antisymmetric Stretch–Bend States of
, Determined from Stimulated-Emission Pumping Spectra
Notation for bending levels given in bent (υb, K) and linear (υ, l) notations.
Even and odd J levels correspond to different l(K)-type doublets.
Energies relative to the 004 J = 2 level at 7914.8(5) cm−1.
Table 3
Comparison of Rotational Constants for Antisymmetric Stretch Levels of
Notation for bending levels given in bent (υb, K) and linear (υ, l) notations.
Even and odd J levels correspond to different l(K)-type doublets.
Energies relative to the 002 J = 2 level at 4038.2(5) cm−1.
Table 2
Rovibrational Term Energies (cm−1) for 0υ4 Antisymmetric Stretch–Bend States of
, Determined from Stimulated-Emission Pumping Spectra
Notation for bending levels given in bent (υb, K) and linear (υ, l) notations.
Even and odd J levels correspond to different l(K)-type doublets.
Energies relative to the 004 J = 2 level at 7914.8(5) cm−1.
Table 3
Comparison of Rotational Constants for Antisymmetric Stretch Levels of
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