Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 141, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4897979
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Funding
- National Science Foundation (NSF) [MRI-ID 1126380]
- CNRS
- Universite de Rennes 1
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1126380] Funding Source: National Science Foundation
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We report the development of a new instrument that combines chirped-pulse microwave spectroscopy with a pulsed uniform supersonic flow. This combination promises a nearly universal detection method that can deliver isomer and conformer specific, quantitative detection and spectroscopic characterization of unstable reaction products and intermediates, product vibrational distributions, and molecular excited states. This first paper in a series of two presents a new pulsed-flow design, at the heart of which is a fast, high-throughput pulsed valve driven by a piezoelectric stack actuator. Uniform flows at temperatures as low as 20 K were readily achieved with only modest pumping requirements, as demonstrated by impact pressure measurements and pure rotational spectroscopy. The proposed technique will be suitable for application in diverse fields including fundamental studies in spectroscopy, kinetics, and reaction dynamics. (C) 2014 AIP Publishing LLC.
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