|
ИСТИНА |
Войти в систему Регистрация |
Интеллектуальная Система Тематического Исследования НАукометрических данных |
||
Laser excitation of molecule vibrations at various mechanisms of rotational-translational relaxation: effects of rotational bottleneck formation and removalстатья
Статья опубликована в журнале из списка RSCI Web of Science
Статья опубликована в журнале из списка Web of Science и/или ScopusДата последнего поиска статьи во внешних источниках: 25 апреля 2017 г.
- Автор: Ivanov S.V.
- Журнал: Physics of Wave Phenomena
- Том: 14
- Номер: 4
- Год издания: 2006
- Издательство: Allerton Press Inc.
- Местоположение издательства: United States
- Первая страница: 14
- Последняя страница: 19
- Аннотация: The effects of rotational bottleneck and its removal were studied using state-to-state kinetic equations describing in detail the rotational-translational (RT) relaxation under conditions of laser pumping of the vibrational-rotational absorption band of a molecular gas. The results obtained for a model diatomic molecule were compared using various semiempirical expressions for probabilities of rotational transitions: the Polanyi–Woodall model, one-photon transitions, inverse-power dependence, and strong collision model. It was shown that rotational relaxation features have a noticeable effect on the excitation of the upper vibrational level in the modes of bottleneck and its removal. The differences increase with gas pressure in the considered range of 3–30 Torr. The strong collision model (reservoir model) always yields the maximum result. It was shown that the absence of data on the rotational relaxation mechanism can introduce a significant systematic error to the calculated absorbed energy (by a factor of 1.5–2 for the considered example at 30 Torr). The dependencies of upper vibrational level population |1 on laser intensity N1(I) are similar for different models of rotational relaxation and the determination of the type of RT-exchange model is, apparently, impossible from the experiments on laser absorption saturation (measurement of N1(I) dependence)
- Добавил в систему: Иванов Сергей Викторович