A chirped-pulse Fourier-transform microwave/pulsed uniform flow spectrometer. I. The low-temperature flow system
Name
Field_A chirped.pdf
Size
846.13 KB
Format
Adobe PDF
Checksum (MD5)
f94eb382b45b1a31d01f8f19b73b5793
Author(s)
Oldham, James M.
Abeysekera, Chamara
Joalland, Baptiste
Zack, Lindsay N.
Prozument, Kirill
Sims, Ian R.
Suits, Arthur G.
Park III, George Barratt
Field, Robert W
Date Issued
October 2014
Journal
The Journal of Chemical Physics
Publisher
American Institute of Physics (AIP)
Citation
Oldham, James M. et al. “A Chirped-Pulse Fourier-Transform Microwave/Pulsed Uniform Flow Spectrometer. I. The Low-Temperature Flow System.” The Journal of Chemical Physics 141.15 (2014): 154202. © 2014 AIP Publishing LLC
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1063/1.4897979
