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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 9 (1987), S. 1467-1476 
    ISSN: 0392-6737
    Keywords: Inelastic scattering of atoms and molecules
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Abbiamo in precedenza studiato il processo di collisione di energy pooling in una miscela di sodio e potassio. In questo lavoro si analizzano i particolari effetti indotti dalla presenza di alcuni Torr di gas tampone introdotti nella cella. Viene dimostrato che il gas tampone favorisce il processo di trasferimento di energia fra Na(3P) e K(4S), che viene rivelato attraverso gli effetti indotti sugli stati altamente eccitati popolati dalle collisioni Na(3P)/Na(3P) e K(4P)/K(4P).
    Abstract: Резюме Ранее авторы в амальгаме натрия и калия исследовали распределение энергии в смесях щелочных паров. В этой статье мы описываем особенности, возникающие при введении буферного газа в ячейку. Мы поквзываем, что буферный газ усиливает обмен энергией между Na(3P) и K(4S), который детектируется через эффекты, связанные с высоко возбужденными состояниями, заселенными при Na(3P)/Na(3P) и K(4P)/K(4P) соударенияш.
    Notes: Summary Energy pooling in alkali vapour mixtures has been previously investigated by us in an amalgam of sodium and potassium. In this paper we describe the peculiar features appearing when some buffer gas is introduced in the cell. We demonstrate that the buffer gas enhances the energy transfer between Na(3P) and K(4S), which is detected through the effects induced on the highly excited states populated by the Na(3P)/Na(3P) and K(4P)/K(4P) collisions.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 1 (1982), S. 49-69 
    ISSN: 0392-6737
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Quando vapori di potassio sono illuminati dalla luce di un laser a colorante risonante con la transizione fondamentale 4S→4P, si osservano transizioni sia da livelli atomici molto alti, sia dalivelli molecolari. In questo articolo si descrive uno studio spettroscopico di questi fenomeni e si dà la prova sperimentale che il meccanismo responsabile della popolazione di alcuni dei livelli non direttamente eccitati dal laser richiede la creazione di un plasma nel vapore.
    Abstract: Резюме Обпучение паров калия лазером на красителях с основными переходами 4S→4P приводит к возбуждению высоколежащих атомных и молекулярных состояний. В этой работе мы сообщаем резулбтаты спектроскопических исследований этого явления и экспериментальное подтверждение, что механизм, ответственный за заселение некоторых уровней, в результате не прямого возбуждения лазером, включает образование плазмы в паре.
    Notes: Summary The illumination of potassium vapour by means of a c.w. dye-laser resonant with the fundamental 4S→4P transitions results in the excitation of high-lying atomic and molecular states. In the present paper we report a spectroscopic study of this phenomenon and experimental evidence that the mechanisms responsible for the population of some of the levels not directly excited by the laser involve the creation of a plasma in the vapour.
    Type of Medium: Electronic Resource
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  • 3
    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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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 13 (1991), S. 677-685 
    ISSN: 0392-6737
    Keywords: Intensities and shapes of molecular spectral lines and bands ; Atmospheric optics ; Laser beam propagation ; LIDAR measurements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Diode laser spectroscopy of water vapour has been performed in the near IR and the pressure broadening coefficients in nitrogen and in air have been measured for one rotovibrational line. Detection of water vapour in the atmosphere has been obtained and an evaluation of the sensitivity of our apparatus is reported. Discussion for further improvements is made.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 117-126 
    ISSN: 0392-6737
    Keywords: Intensities and shapes of molecular spectral lines and bands ; Atmospheric optics ; Optical spectroscopy and spectrometers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Diode laser spectroscopy of ammonia ro-vibrational overtone transitions has been performed in the near IR, by using direct absorption, wavelength modulation, and two-tone frequency modulation techniques. Pressure broadening coefficients in air, hydrogen, helium and self-broadening have been measured. The high sensitivity of the apparatus permitted the detection of 70 p.p.m. of NH3 in air per meter of path at atmospheric pressure. New lines have been observed in the 719.9 nm band.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Physics Letters A 159 (1991), S. 266-270 
    ISSN: 0375-9601
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 715-717 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We present the measurement of the sticking coefficient of Ba atoms on a MgO substrate by resonant laser induced fluorescence. The substrate is used as a target for a thermal atomic beam of barium while a laser crosses the substrate and counterpropagates to the atomic beam monitoring its velocity profile. A signal corresponding to negative velocity atoms with respect to the beam direction allows to determine the sticking coefficient. It resulted equal to 0.76 ±0.05. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Quantitative Spectroscopy and Radiative Transfer 47 (1992), S. 103-112 
    ISSN: 0022-4073
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0030-4018
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Optics Communications 63 (1987), S. 43-48 
    ISSN: 0030-4018
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
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