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  State-to-state rate coefficients for NH3–NH3 collisions from pump–probe chirped pulse experiments

Endres, C. P., Caselli, P., & Schlemmer, S. (2019). State-to-state rate coefficients for NH3–NH3 collisions from pump–probe chirped pulse experiments. The Journal of Physical Chemistry Letters, 10(17), 4836-4841. doi:10.1021/acs.jpclett.9b01653.

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State-to-State Rate Coefficients for NH3–NH3 Collisions from Pump–Probe Chirped Pulse Experiments.pdf (Any fulltext), 746KB
 
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Endres, Christian P.1, Author           
Caselli, Paola1, Author           
Schlemmer, Stephan, Author
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1Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society, ou_1950287              

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 Abstract: The kinetics of rotational inelastic NH3–NH3 collisions are recorded using pump–probe experiments, carried out with a K-band waveguide chirped pulse Fourier transform microwave spectrometer, in which the population of one inversion doublet is altered by the pump pulse. Due to self-collisions, the resulting deviation from equilibrium propagates to other states and, thus, can be interrogated by probe pulses as a function of the pump–probe delay time. A clear hierarchy of the state-to-state collision processes is found and subsequently translated into propensity rules. State-to-state rate coefficients are estimated, first via an analysis of the kinetics, and then more robustly and accurately derived from the pressure-dependent measurements using a global fitting procedure.

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Language(s): eng - English
 Dates: 2019-08-12
 Publication Status: Published online
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.9b01653
Other: LOCALID: 3179205
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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 10 (17) Sequence Number: - Start / End Page: 4836 - 4841 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185