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  • 1990-1994  (4)
  • 1980-1984
  • 1994  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 155-161 
    ISSN: 0392-6737
    Keywords: Line shapes, widths, and shifts ; Fine- and hyperfine-structure constants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The hyperfine spectrum of the iodineR(115)20-1 line, at 570 nm, was obtained by conventional saturated absorption spectroscopy. The differences of nuclear electric-quadrupole (Δe Qq) and spin-rotation (ΔC) constants between theB andX states were determined by a least-square fit to the experimental data. This line may provide a good frequency reference in coincidence with the1 S 0-1 P 1 resonant transition of magnesium, at 285 nm, when this one is investigated with frequency doubled lasers.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 1347-1360 
    ISSN: 1572-9559
    Keywords: methanol ; Far Infrared laser ; frequency measurement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present frequency measurements of 85 Far Infrared (FIR) laser lines ranging from 2 748 GHz to 421 GHz. We use the heterodyne technique of mixing FIR laser transitions and microwave radiation on MIM point contact diodes to determine the FIR frequencies.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 1-44 
    ISSN: 1572-9559
    Keywords: FIR Laser Lines ; Methanol's Isotopes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The technique of optical pumping in polar molecules is the most efficient for Far-Infrared (FIR) laser generation, providing also a versatile and powerful tool for molecular spectroscopy in this spectral region. Methanol (CH3OH) and its isotopic varieties are the best media for optically pumped FIR laser, with over thousand lines observed, and the most widely used for investigations and applications. In this sense, it is important organize and make available catalogues of FIR laser lines as complete as possible. Since the last critical reviews of 1984 [1] on methanol and its isotopic varieties [2,3,4], over hundred papers have been published dealing with hundreds of new FIR laser lines. In 1992 a review of FIR laser lines from CH3OH was presented [5]. In this communication we extend this work to the other methanol isotopes, namely CH3OD, CD3OH, CD3OD,13CH3OH,13CD3OH,13CD3OD, CH3 18OH, CH2DOH, CHD2OH and CH2DOD.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    International journal of infrared and millimeter waves 15 (1994), S. 417-428 
    ISSN: 1572-9559
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this work we present high resolution Doppler limited absorption spectra measurements of the C-O stretching mode of13CH3OH, obtained from diode laser spectroscopy, and the Fourier Transform spectrum obtained at 0.12 cm−1 resolution. By using these data and previously known spectroscopic information, we determined the frequency and the J quantum number for the multiplets of the P and R(J) branches of the C-O stretching fundamental band. Infrared transitions in coincidence with emission lines of the regular CO2 laser and some of its isotope parents are pointed out.
    Type of Medium: Electronic Resource
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