Abstract
Hight resolution absorption spectra of the A (3) Pi(1u)-X (1) Sigma(g)(+) system of I-2, consisting of some 9552 lines of some 79 bands spanning the vibrational range upsilon' = 0-35 and upsilon '' = 3-17, have been recorded and analyzed. A fit to them which uses the previously determined accurate molecular constants for the X (1) Sigma(g)(+) state yields an accurate new set of molecular constants for the A state, including the Lambda doubling constants. The A-state vibrational and inertial rotational constants, as well as mechanically consistent centrifugal distortion constants, are represented by near-dissociation expansions, yielding an accurate representation of the experimental data which also provides a reliable global representation of all observed and unobserved vibration-rotation levels of this state. (C) 1996 American Institute of Physics.
Original language | English |
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Pages (from-to) | 903-913 |
Number of pages | 11 |
Journal | Journal of Chemical Physics |
Volume | 104 |
Issue number | 3 |
Publication status | Published - 15 Jan 1996 |
Keywords
- CENTRIFUGAL-DISTORTION CONSTANTS
- FREE-JET EXPANSION
- DIATOMIC-MOLECULES
- SPECTROSCOPIC DATA
- TRANSITION
- I2
- SYSTEM
- IODINE
- ENERGY
- STATE