Abstract / Description of output
Structured emission in the gas phase to two weakly bound valence states that correlate with the third dissociation limit, I-*(P-2(1/2))+I-*(P-2(1/2)), designated as (bb), from two third tier ion-pair states of I-2 correlating with I-(S-1(0))+I+(D-1(2)), the 1(g)(D-1(2)), and F(')0(u) (+)(D-1(2)) states, has been observed for the first time. The 1(u)(bb) state is shown to be bound by 377 +/- 2 cm(-1) and molecular constants have been determined. Vibrational structure in the 0(g)(+)(bb) state could not be resolved but the spectrum is consistent with the state being bound by 435 cm(-1). The relative integrated intensities of the emissions from both ion-pair states to various valence states have also been measured, and some aspects are rationalized in terms of the electronic configurations of the upper and lower states. Bound levels of a previously uncharacterized 1(g)(ab) valence state have also been observed in emission from the gamma 1(u)(P-3(2)) ion-pair state. The lower state is shown to be bound by 270 +/- 2 cm(-1) and molecular constants have been determined. (C) 2007 American Institute of Physics [DOI:10.1063/1.2795722]
Original language | English |
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Article number | 154306 |
Number of pages | 7 |
Journal | The Journal of Chemical Physics |
Volume | 127 |
Issue number | 15 |
DOIs | |
Publication status | Published - 21 Oct 2007 |
Keywords / Materials (for Non-textual outputs)
- OPTICAL DOUBLE-RESONANCE
- ION-PAIR STATES
- FOURIER-TRANSFORM SPECTROMETRY
- MOLECULAR-IODINE
- SPECTROSCOPY
- FLUORESCENCE
- EXCITATION
- I2
- TRANSITION
- SYSTEM