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  • 1
    Electronic Resource
    Electronic Resource
    High-resolution photoionization spectrum of water molecules in a supersonic beam (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 2249-2263 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have obtained high-resolution (∼1.5 cm−1) photoionization spectra of supersonically cooled (Trot∼50 K) H2O and D2O in the 1000–900 A(ring) range. The light source, which used the technique of frequency tripling in a pulsed free jet of gas, is described briefly. Spectra are rotationally resolved. Vibrationally excited autoionizing Rydberg series converging to the ground electronic [X˜; (1b1)−1] state of the molecular ion are detected. This may well be the first example of a highly resolved Rydberg spectrum of a stable polyatomic molecule. From the convergence limit, the ionization potential H2O is determined to be 101 777±7 cm−1. Intensities of the Rydberg state autoionization signals are smaller than predicted with known Franck–Condon factors, indicating that predissociation is a competitive decay channel. Rydberg state lifetimes are ∼1 ps, deduced from homogeneous linewidths. Autoionizing features from Rydberg states associated with the ion's quasilinear A˜ (3a1)−1 state are observed with linewidths above 10 cm−1, indicating that their lifetimes are less than ∼0.5 ps. Rotational assignments of some of the bands in this linear←bent transition show that the Rydberg and ionic state geometries are nearly identical. A consistent assignment of the controversial bending (v2) quantum number and Rydberg series quantum defect δ=−0.037 have been provided.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454058
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Frequency tripling into the 720–1025-A(ring) region with pulsed free jets (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1616-1620 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We have developed a coherent source of XUV light, which is continuously tunable between 904 and 1024 A(ring), and line tunable to 720 A(ring). It employs the technique of frequency tripling in a pulsed free jet of gas, and requires a single tunable laser system. Spectra of the relative XUV output vs wavelength in the 904–1024-A(ring) range are presented for the tripling gases Ar, Kr, Xe, CO, and N2. Also listed are relative outputs obtained by tripling at resonantly enhanced lines between 720 and 900 A(ring) in Kr, Xe, and CO. Possible improvements to the source are discussed, and examples of its application are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139356
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Erratum: Frequency tripling into the 720–1025-A(ring) region with pulsed free jets [Rev. Sci. Instrum. 58, 1616 (1987)] (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 673-673 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139811
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    Paper (German National Licenses)
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