Quasiclassical impact theory of IR band shapes of linear molecules

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

When molecular collisions are the principal line broadening mechanism the absorption at line centers and in the line wings can be calculated in impact approximation that provides the Lorentz contour for well separated lines. Apart from such lines there are regions in the IR spectra with very dense line structure (Q-branches or band heads for example) where band shape can not be expressed as the sum of Lorentzian lines. These deviations have generally been attributed to line mixing effects. We present here a theory which can be used in shape calculation of overlapped lines if the intermolecular potential is known. The quantum mechanical methods are developed for a limited number of systems and are usually too difficult to be used because of very complicated computations. Instead of this we have used the semiclassical method which can be treated in the simple model representation. The classical impact theory of shape was the basis of our method and then we modernized this theory to apply to a molecular system with discrete spectra. We shall consider here the case of the band shapes for linear molecules.

Язык оригиналаанглийский
Название основной публикацииProceedings of SPIE - The International Society for Optical Engineering
ИздательSPIE
Страницы272-275
Число страниц4
ISBN (печатное издание)081941011X
СостояниеОпубликовано - 1 дек 1992
СобытиеTenth All-Union Symposium on High Resolution Molecular Spectroscopy - Omsk, Russia
Продолжительность: 2 июн 19916 июн 1991

Серия публикаций

НазваниеProceedings of SPIE - The International Society for Optical Engineering
Том1811
ISSN (печатное издание)0277-786X

конференция

конференцияTenth All-Union Symposium on High Resolution Molecular Spectroscopy
ГородOmsk, Russia
Период2/06/916/06/91

Предметные области Scopus

  • Электротехника и электроника
  • Физика конденсатов

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