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  • Molecular spectra, grouped by wavelength ranges  (1)
  • PACS. 42.50.Gy Effects of atomic coherence on propagation, absorption and amplification of light - 42.50.-p Quantum optics  (1)
  • Visible spectra  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 721-732 
    ISSN: 0392-6737
    Keywords: Molecular spectra, grouped by wavelength ranges ; Visible spectra ; Other topics in atomic and molecular processes and interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto La molecola biatomica di potassio K2 è stata eccitata con due righe blu di un laser a Kr+ a 406.7 nm e 413.1 nm. A causa di molteplici processi di diseccitazione è stato osservato un ricco spettro di fluorescenza che copre quasi tutta la regione spettrale analizzata in questo lavoro tra 400 nm e 800 nm. Alcune parti dello spettro non erano state riportate in precedenza; in particolare, interpretiamo la fluorescenza nel blu (≈(400÷470) nm) come dovuta alle bandeC→X eD→X, come indicato anche dagli spettri di assorbimento ottenuti in questa regione spettrale per diverse temperature.
    Abstract: Резюме Для возбуждения двух-атомной молекулы K2 используются две голубые линии (406.7 нм и 413.1 нм) Kr+ лазера. Мы анализируем спектральную область между 400 нм и 800 нм, где наблюдается богатый спектр флуоресценции, который является результатом различных процессов распада. Некоторые хварактеристики спектра ранее не наблюдались; в частности, мы интерпретируем голбую флуоресценцию (≈(400÷470) нм), как обусловленную зонамиC→X иD→X, что также подтверждается спектрами поглощения, которые были зарегистрированы в этой облавсти для различных температур.
    Notes: Summary Two blue lines (406.7 nm and 413.1 nm) of a Kr+ laser have been used to excite the potassium dimer K2. We have analysed the spectral region between 400 nm and 800 nm where a rich fluorescence spectrum has been observed as the result of different decay processes. Some of these features have not been reported previously; in particular we interpret the blue fluorescence (≈(400÷470) nm) as due to theC→X andD→X bands, as indicated also by the absorption spectra recorded in this region for different temperatures.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6079
    Keywords: PACS. 42.50.Gy Effects of atomic coherence on propagation, absorption and amplification of light - 42.50.-p Quantum optics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: In this paper a detailed experimental study of Coherent Population Trapping (CPT) effect on sodium induced by a dye-laser operating in a three-mode regime is presented and a detailed analysis of the role of velocity changing collisions is made. These collisions show a very small relaxation effect on the dark resonances which are visible even at high pressures. For the first time we demonstrate the persistence of the ground state coherence to pressures up to one atmosphere for a relatively “heavy” buffer gas like argon. The experimental results have been compared with theory and a very good agreement has been obtained. Preliminary results on the effect of Na-N2 collisions on Coherent Population Trapping are presented.
    Type of Medium: Electronic Resource
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