Research output: Contribution to journal › Article › peer-review
Collision induced absorption in mercury-rare-gas collisions. / Kurosawa, T.; Ohmori, K.; Chiba, H.; Okunishi, M.; Ueda, K.; Sato, Y.; Devdariani, A. Z.; Nikitin, E. E.
In: Journal of Chemical Physics, Vol. 108, No. 19, 15.05.1998, p. 8101-8109.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Collision induced absorption in mercury-rare-gas collisions
AU - Kurosawa, T.
AU - Ohmori, K.
AU - Chiba, H.
AU - Okunishi, M.
AU - Ueda, K.
AU - Sato, Y.
AU - Devdariani, A. Z.
AU - Nikitin, E. E.
PY - 1998/5/15
Y1 - 1998/5/15
N2 - The far-wing excitation and probe technique is applied to observe quasimolecular absorption bands on the blue side of the Hg 6 1S0-6 3P2 atomic line for the Hg-Ar, Hg-Kr, and Hg-Xe mixtures. It is found that the excitation of this band is followed predominantly by a rapid elastic half-collision scattering on the excited state potential yielding the nascent product state Hg(3P2). This gives direct evidence of the assignment of the absorption to the c 31 → X 10 collision induced dipole transition of the Hg-rare-gas quasimolecules. A chance of nonadiabatic transition from the c state is negligibly small compared to the elastic scattering. Analytical procedures are presented to deduce the c-X transition dipole moment from the relevant potential energy curves by making use of the Hund's coupling schemes of the molecular electronic states. The c-X transition dipole moment is estimated as a function of the internuclear distance and is incorporated into the analysis of the observed band profiles. The potential energy curves of the c, A 30+ , and B 31 states are also estimated from the analysis for Hg-Ar and Hg-Kr. The Hg-Xe system shows a small undulation in the c→X band suggesting that it involves a satellite structure due to an extremum of the c-X difference potential.
AB - The far-wing excitation and probe technique is applied to observe quasimolecular absorption bands on the blue side of the Hg 6 1S0-6 3P2 atomic line for the Hg-Ar, Hg-Kr, and Hg-Xe mixtures. It is found that the excitation of this band is followed predominantly by a rapid elastic half-collision scattering on the excited state potential yielding the nascent product state Hg(3P2). This gives direct evidence of the assignment of the absorption to the c 31 → X 10 collision induced dipole transition of the Hg-rare-gas quasimolecules. A chance of nonadiabatic transition from the c state is negligibly small compared to the elastic scattering. Analytical procedures are presented to deduce the c-X transition dipole moment from the relevant potential energy curves by making use of the Hund's coupling schemes of the molecular electronic states. The c-X transition dipole moment is estimated as a function of the internuclear distance and is incorporated into the analysis of the observed band profiles. The potential energy curves of the c, A 30+ , and B 31 states are also estimated from the analysis for Hg-Ar and Hg-Kr. The Hg-Xe system shows a small undulation in the c→X band suggesting that it involves a satellite structure due to an extremum of the c-X difference potential.
KW - FAR-WING EXCITATION
KW - INTERATOMIC POTENTIALS
KW - VANDERWAALS COMPLEXES
KW - ELECTRONIC STATES
KW - ATOMIC-COLLISIONS
KW - QUASI-MOLECULES
KW - SUPERSONIC JET
KW - TRANSITIONS
KW - RESONANCE
KW - SPECTRA
UR - http://www.scopus.com/inward/record.url?scp=0000928869&partnerID=8YFLogxK
U2 - 10.1063/1.476249
DO - 10.1063/1.476249
M3 - Article
AN - SCOPUS:0000928869
VL - 108
SP - 8101
EP - 8109
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 19
ER -
ID: 28478491