Publication

Direct measurement of eigenstate-resolved unimolecular dissociation rates of HOCl

Thomas Rizzo
1997
Journal Articles

Abstract

Double-resonance overtone excitation prepares HOCl molecules in single rovibrational states above the unimolecular dissociation threshold in the ground electronic state, Detecting the OH dissociation fragments allows us to observe which reactant states lie above or below the dissocation threshold and determine that threshold to be 19 290.3+/-0.6 cm(-1). Dissociation rates from single, well-characterized eigenstates of the parent molecule exhibit fluctuations of more than an order of magnitude. (C) 1997 American Institute of Physics. [S0021-9606(97)04047-6].

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https://infoscience.epfl.ch/entities/publication/ce7df6db-5898-4d79-8ede-bcf95a3bf841

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Thomas Rizzo
1997
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ce7df6db-5898-4d79-8ede-bcf95a3bf841

About this result

Related concepts (16)

Energy level

A quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy, called energy levels. This contrasts with classical particles, which can have any amount of energy. The term is commonly used for the energy levels of the electrons in atoms, ions, or molecules, which are bound by the electric field of the nucleus, but can also refer to energy levels of nuclei or vibrational or rotational energy levels in molecules.

Rotational–vibrational spectroscopy

Rotational–vibrational spectroscopy is a branch of molecular spectroscopy concerned with infrared and Raman spectra of molecules in the gas phase. Transitions involving changes in both vibrational and rotational states can be abbreviated as rovibrational (or ro-vibrational) transitions. When such transitions emit or absorb photons (electromagnetic radiation), the frequency is proportional to the difference in energy levels and can be detected by certain kinds of spectroscopy.

Transition state theory

In chemistry, transition state theory (TST) explains the reaction rates of elementary chemical reactions. The theory assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated transition state complexes. TST is used primarily to understand qualitatively how chemical reactions take place.

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