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  • 1
    Electronic Resource
    Electronic Resource
    Reliability of semi-classical calculations for collisional lineshapes in thev 2 ammonia band (1987)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 9 (1987), S. 903-907 
    Details
    ISSN: 0392-6737
    Keywords: Line and band widths, shapes and shifts ; Infrared spectra
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Diode laser measurements, recently published for self- and N2 broadening in thev 2 ammonia band, are proved in agreement with predictions of the semi-classical ATC theory. Discrepancies for the self-shifts calculated by other authors are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453758
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  • 2
    Electronic Resource
    Electronic Resource
    High-resolution measurements of pressure self-broadening and shift for the metyl-cyanide rotationalJ=1−0 line (1988)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 10 (1988), S. 511-518 
    Details
    ISSN: 0392-6737
    Keywords: Intensities and shapes of molecular spectral line and bands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si discutono le prestazioni di uno spettrometro a microonde ad onda progressiva nel campo della spettroscopia ad alta risoluzione in gas a bassa pressione. Sono in particolare considerati alcuni aspetti delle procedure sperimentali e dell'elaborazionedei dati che hanno portato a decisi miglioramenti nella sensibilità e nelle prestazioni complessive dell'apparato sperimentale. Sono stati misurati per la riga rotazionaleJ=1–0 di CH3C14N un coefficiente di autoallargamento per pressione di (72.5±1.5) MHz/Torr e uno shift di (4.3±0.3) MHz/Torr. Queste misure risultano piú accurate di quelle precedentemente riportate e in migliore accordo con le previsioni teoriche.
    Abstract: Резюме Обсуждаются возможности использования микроволнового спектрометра со скользящей волной для измерений с высоким разрешением в газах при низких давлениях. Рассматриваются основные аспекты экспериментальной процедуры и обработки данных, которые позволяют улучшить чувствительность аппаратуры. Измерены величины самоуширения с давлением (72.5±1.5) МГц/Тор и сдвига с давлением (4.3±0.3) МГц/Тор для ротационной линииJ=1–0 для CH3C14N. Полученные результаты являются более точными, чем ранее опубликованные, и лучше согласуются с теоретическими предесказаниями.
    Notes: Summary The capabilities of the travelling-wave spectrometry in the field of high-resolution measurements of low-pressure gases at microwave frequencies are discussed. Some details about the main aspects of the experimental procedure and the data management, useful for the improvement of overall performances, are specified. A pressure broadening of (72.5±1.5) MHz/Torr and a pressure shift of (4.3±0.3) MHz/Torr are measured for theJ=1−0 rotational line of CH3C14N. These results are more accurate than those previously reported and in better agreement with the theoretical predictions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453292
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  • 3
    Electronic Resource
    Electronic Resource
    Identification of a forbidden ammonia transition: Confirmation by pressure broadening measurements (1985)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 5 (1985), S. 415-418 
    Details
    ISSN: 0392-6737
    Keywords: Molecular spectra, grouped by wave-length ranges
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Misure di allargamento per pressione confermano l'identificazione della riga proibita dell'ammoniacass −3 P(4,3) a 887.780 cm−1. Inoltre il suo spostamento per pressione insieme agli spostamenti di transizioni submillimetriche dimostra ancora una volta la validitá dell'additività negli spostamenti.
    Notes: Summary Pressure broadening measurements confirm the identification of the forbidden ammonia transitionss −3(4, 3) at 887.780 cm−1, Moreover, its pressure shift together with those of submillimeter transitions adds new confidence on the validity of the shift additivity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450646
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  • 4
    Electronic Resource
    Electronic Resource
    The pressure broadening and shift for theJ=1−0 line of CH3C14N: Resolved and overlapped hyperfine components (1986)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 7 (1986), S. 105-112 
    Details
    ISSN: 0392-6737
    Keywords: Intensities and shapes of molecular spectral lines and bands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Sono stati misurati i parametri di allargamento e spostamento per pressione della rigaJ=1−0 del CH3C14N a 18.4 GHz. Tali misure sono state eseguite, sulle tre componenti iperfini e sul loro inviluppo osservato a pressionip≥40 mTorr. In accordo con le previsioni teoriche, questi parametri risultano gli stessi per tutte le righe osservate: Γ p = (50 ± 5) MHz/Torr,s=(7±2) MHz/Torr. Questi valori sono confrontati con quelli delle precedenti misure che mostrano una considerevole dispersione, specialmente per quanto riguarda il parametro di spostamento. L'allargamento per pressione è risultato piú basso di quello previsto dalla teoria di Anderson di circa il 40%.
    Notes: Summary Pressure broadening and shift parameters are measured for theJ=1−0 line of CH3C14N at 18.4 GHz, both for the three hyperfine components and for the single line which envelopes the hyperfine components, observed at higher pressures (p≥40 mTorr). In agreement with theoretical predictions, these parameters are the same for all the observed lines: Γ p = (50 ± 5) MHz/Torr,s=(7±2) MHz/Torr. These values are compared with previous measurements, showing a large variance expecially for the shift parameter. The measured broadening parameter is 40% lower than prediction of the Anderson theory.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02452400
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