Publication

Rydberg states and intramolecular relaxation of nitric oxide trapped in rare gas matrixes

Majed Chergui
1985
Book Chapters

Abstract

Three new progressions consisting of broad bands were obsd. in the absorption spectrum of NO in solid Ar. They are identified as the mol. Rydberg A 2.sum.+,C 2P and D 2.sum.+-X 2P (v', 0) transitions, blue shifted with respect to the gas phase by .apprx.0.85 eV. Excitation of the mol. yields emission from A 2.sum.+ (v = 0) with large absorption-emission Stokes shifts, and from the valence B 2P(v = 0) and a 4P(v = 0) states. Intensity ratios between these states in Ar, Kr, and Xe matrixes are given and discussed. [on SciFinder (R)]

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https://infoscience.epfl.ch/entities/publication/ad3beb99-05ec-43ee-8e9a-3c96421be1ca

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Majed Chergui
1985
Book Chapters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ad3beb99-05ec-43ee-8e9a-3c96421be1ca

About this result

Related concepts (32)

Absorption spectroscopy

Absorption spectroscopy refers to spectroscopic techniques that measure the absorption of electromagnetic radiation, as a function of frequency or wavelength, due to its interaction with a sample. The sample absorbs energy, i.e., photons, from the radiating field. The intensity of the absorption varies as a function of frequency, and this variation is the absorption spectrum. Absorption spectroscopy is performed across the electromagnetic spectrum.

Emission spectrum

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an electron making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum.

Electromagnetic absorption by water

The absorption of electromagnetic radiation by water depends on the state of the water. The absorption in the gas phase occurs in three regions of the spectrum. Rotational transitions are responsible for absorption in the microwave and far-infrared, vibrational transitions in the mid-infrared and near-infrared. Vibrational bands have rotational fine structure. Electronic transitions occur in the vacuum ultraviolet regions. Liquid water has no rotational spectrum but does absorb in the microwave region.

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Rydberg states and intramolecular relaxation of nitric oxide trapped in rare gas matrixes

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