The vibrational/rotational assignment of the LIF spectrum of the A{sup 2}A{sub 1}-X{sup 2}E electronic transition of the methoxy radical

Conference · Tue Dec 31 04:00:00 EST 1996

OSTI ID:437267

Pushkarsky, M B; Powers, D E; Miller, T A ^[1]

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1. Ohio State Univ., Columbus, OH (United States)

The methoxy radical was revisited and its LIF spectrum in a free jet expansion was recorded using a specially designed extension attached to the nozzle. This modification allows one to cool molecules vibrationally and observe only transitions from the vibrationless level of the ground electronic state. This gave rise to a dramatic simplification of the spectrum, compared to previous observations. However, even a vibrationally cold spectrum is quite complex because the methoxy radical ground state has E symmetry and thus exhibits Jahn-Teller distortion giving rise to transitions from the, vibrationless level of the lower electronic state to both symmetric and asymmetric vibronic levels of the upper electronic state. The authors have used the rotational analysis of the spectra to distinguish between bands in the LIF spectrum due to transitions to symmetric and asymmetric modes.

• OSTI ID: 437267
• Report Number(s): CONF-9606118--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
FLUORESCENCE SPECTROSCOPY
GROUND STATES
JAHN-TELLER EFFECT
LASER SPECTROSCOPY
METHOXY RADICALS
ROTATIONAL STATES
VIBRATIONAL STATES