Electronic Branching Ratios of Spontaneous Emission for Transitions between States of the 3d and 2p Singlet Complexes of Terms of H2

S. A. Astashkevich, M. V. Kalachev, B. P. Lavrov

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

The ratios of probabilities (the electronic branching ratios) for the rovibronic spontaneous transitions are for the first time measured for transitions from the rotational levels with J′ ≤ 6 of the I 1g -,v′ = 0-2 and J 1δg -, v′ = 0 states to the vibrational-rotational levels of different low-lying electronic states B 1u +, v″, J′ and C 1u -, v‴, J′ - 1 of the H2 molecule (for the vibrational quantum numbers v″ ≤ 4 and v‴ ≤ 2). Values of these quantities provide a new channel of information on the internal structure of the hydrogen molecule thus far unused and should be particularly sensitive to the adiabatic values of the electronic transition dipole moments. In studying the entire set of rovibronic radiative transitions, they may significantly add to the experimental data on rovibronic terms, radiative lifetimes, and vibrational and rotational branching ratios used before. The experimental data obtained are compared to the corresponding values derived from the results of an earlier semiempirical determination and ab initio calculation of the absolute transition probabilities. Our experimental data are in remarkable agreement with the semiempirical results and significantly differ from the ab initio results. This fact directly suggests the necessity of performing more accurate ab initio calculations of the rovibronic transition probabilities for the given systems of bands.

Язык оригиналаанглийский
Страницы (с-по)484-492
Число страниц9
ЖурналOptics and Spectroscopy (English translation of Optika i Spektroskopiya)
Том90
Номер выпуска4
DOI
СостояниеОпубликовано - 1 апр 2001

Предметные области Scopus

  • Спектроскопия
  • Атомная и молекулярная физика и оптика

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