M
Mitchio Okumura
Researcher at California Institute of Technology
Publications - 106
Citations - 4695
Mitchio Okumura is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Spectroscopy & Infrared spectroscopy. The author has an hindex of 33, co-authored 102 publications receiving 4426 citations. Previous affiliations of Mitchio Okumura include University of California & University of California, Berkeley.
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Journal ArticleDOI
A new instrument for kinetics and branching ratio studies of gas phase collisional processes at very low temperatures
Olivier Durif,Michael Capron,Joseph Messinger,Abdessamad Benidar,Ludovic Biennier,Jérémy Bourgalais,André Canosa,Jonathan Courbe,Gustavo A. Garcia,J. F. Gil,Laurent Nahon,Mitchio Okumura,Lucile Rutkowski,Ian R. Sims,Jonathan Thiévin,S. D. Le Picard +15 more
TL;DR: A new instrument dedicated to the kinetic study of low-temperature gas phase neutral-neutral reactions, including clustering processes, is presented that combines a supersonic flow reactor with vacuum ultra-violet synchrotron photoionization time-of-flight mass spectrometry.
Journal Article
Frequency-stabilized cavity ring-down spectroscopy
TL;DR: In this article, the authors describe frequency-stabilized cavity ring-down spectroscopy (FS-CRDS), an ultraprecise refinement of conventional CRDS, which has the potential to reduce the uncertainty in both absorption and frequency axes of our spectra by more than an order of magnitude.
Journal ArticleDOI
Optically Switched Dual-Wavelength Cavity Ring-Down Spectrometer for High-Precision Isotope Ratio Measurements of Methane δD in the Near Infrared.
TL;DR: In this paper, a waveguide optical switch rapidly alternated between two wavelengths to detect absorption by two isotopologues using near-infrared CRDS, alleviated commonmode noise that originated primarily from temperature and frequency fluctuations.
Proceedings ArticleDOI
Infrared spectroscopy of hydrated halide ion clusters
TL;DR: In this article, the effects of adding small numbers of solvent molecules to anions have been investigated, and it has been shown that for the chloride ion the water molecules tend to associate, but that water-water hydrogen bonds are not necessarily formed at the smallest size.
Journal ArticleDOI
Tribute to Takeshi Oka.
TL;DR: The diversity of contributions in this issue reflects both the breadth of Oka’s intellect and the many who have been drawn to him by his generosity, his humanity, and his passionate quest for truth.