Publication

Intramolecular electronic-to-vibrational energy conversion in NO trapped in Xe matrices

Majed Chergui
1988
Journal Articles

Abstract

Energy- and time-resolved IR emission spectra of NO trapped in Kr and Xe matrixes following excitation by an ArF laser were recorded. In Kr matrixes, the ground-state levels are predominantly populated by radiative decay from the a 4P state. The Xe matrixes ground-state v - v - 2 IR emission bands were obsd. for v = 22-3, confirming that in the NO/Xe system most of the excited-state energy is dissipated nonradiatively into the ground state. The IR bands show typical radiative decay times in the ms range but in Xe for all measured levels (v = 22-15), the rise time is ?1 ms. The nonradiative decay of the excited states to the ground state of NO in Xe matrixes is highly nonresonant. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/688d6078-5904-43d1-908f-8b263efae9d0

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Majed Chergui
1988
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/688d6078-5904-43d1-908f-8b263efae9d0

About this result

Related concepts (32)

Excited state

In quantum mechanics, an excited state of a system (such as an atom, molecule or nucleus) is any quantum state of the system that has a higher energy than the ground state (that is, more energy than the absolute minimum). Excitation refers to an increase in energy level above a chosen starting point, usually the ground state, but sometimes an already excited state. The temperature of a group of particles is indicative of the level of excitation (with the notable exception of systems that exhibit negative temperature).

Ground state

The ground state of a quantum-mechanical system is its stationary state of lowest energy; the energy of the ground state is known as the zero-point energy of the system. An excited state is any state with energy greater than the ground state. In quantum field theory, the ground state is usually called the vacuum state or the vacuum. If more than one ground state exists, they are said to be degenerate. Many systems have degenerate ground states.

Infrared spectroscopy

Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) is the measurement of the interaction of infrared radiation with matter by absorption, emission, or reflection. It is used to study and identify chemical substances or functional groups in solid, liquid, or gaseous forms. It can be used to characterize new materials or identify and verify known and unknown samples. The method or technique of infrared spectroscopy is conducted with an instrument called an infrared spectrometer (or spectrophotometer) which produces an infrared spectrum.

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Intramolecular electronic-to-vibrational energy conversion in NO trapped in Xe matrices

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