Coherent infrared–ultraviolet double-resonance spectroscopy of CH3

Autor:	Jeffrey A. Gray, Roger L. Farrow, Thomas B. Settersten
Rok vydání:	2003
Předmět:	Infrared Chemistry Far-infrared laser Analytical chemistry General Physics and Astronomy medicine.disease_cause Laser Polarization (waves) Spectral line law.invention law medicine Molecule Physical and Theoretical Chemistry Atomic physics Spectroscopy Ultraviolet
Zdroj:	Chemical Physics Letters. 370:204-210
ISSN:	0009-2614
DOI:	10.1016/s0009-2614(03)00062-9
Popis:	Two-color polarization spectroscopy (TC-PS) and two-color resonant four-wave mixing spectroscopy (TC-RFWM) are used to detect photolytically produced CH3 radicals. An infrared laser pumps individual lines in the ν3 fundamental of the X 2 A 2 ″ state, and an ultraviolet laser probes the pumped levels to reveal rotationally resolved spectra of transitions to the predissociated B 2 A 1 ′ state. The spectra are fit with a complex Lorentzian lineshape and yield an updated value of 46 239.4±1.2 cm −1 for T0 of the B state. A detection limit of 2×1013 CH3 molecules per cm3 per quantum state is observed for these coherent double-resonance techniques.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c21057ae2afce66fc4376da03ee2ed0b https://doi.org/10.1016/s0009-2614(03)00062-9 Zobrazit plný text záznamu Full Text from ScienceDirect