Photoionization spectroscopy of Ga-rare gas complexes

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.475983· OSTI ID:625381

Stangassinger, A; Knight, A M; Duncan, M A ^[1]

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1. Department of Chemistry, University of Georgia, Athens, Georgia30602 (United States)

New electronic states, F{sup 2}{Delta}{sub 3/2}, G{sup 2}{Delta}{sub 5/2}, H{sup 2}{Pi}{sub 1/2}, and I{sup 2}{Pi}{sub 3/2}, are investigated for the complexes GaAr, GaKr, and GaXe with resonant two-photon photoionization spectroscopy. These excited states correlate to the {sup 2}D{l_arrow}{sup 2}P (4d{l_arrow}4p) atomic transition of gallium. Vibronic structure in these spectra are used to obtain vibrational constants, and extrapolated progressions are used to determine dissociation energies. The upper {sup 2}{Delta} states are more than twice as strongly bound as the corresponding {sup 2}{Pi} states. Excited state values of dissociation energies are used in energetic cycles to determine ground-state dissociation energies for GaAr, GaKr, and GaXe. In all three cases, the values obtained are significantly lower than previous estimates. The ground state of GaAr is extremely weakly bound, with D{sub 0}{sup {double_prime}}=20{plus_minus}20cm{sup {minus}1}, while the corresponding value for GaKr is only 35{plus_minus}20cm{sup {minus}1}. The B{sup 2}{Sigma}{sup +} excited states of the Ga{endash}RG complexes are confirmed to have substantial barriers in their long-range potentials. {copyright} {ital 1998 American Institute of Physics.}

• OSTI ID: 625381
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 14 Vol. 108; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ABSORPTION SPECTRA
DISSOCIATION ENERGY
ELECTRONIC STRUCTURE
EXCITED STATES
GALLIUM COMPLEXES
INTERATOMIC FORCES
L-S COUPLING
MULTI-PHOTON PROCESSES
PHOTOIONIZATION
RARE GAS COMPOUNDS
ULTRAVIOLET SPECTRA
VAN DER WAALS FORCES
VIBRATIONAL STATES