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  • 1
    Electronic Resource
    Electronic Resource
    Laser diagnostic in molecular beams (1975)
    Springer
    Applied physics 8 (1975), S. 65-70 
    Details
    ISSN: 1432-0630
    Keywords: Nozzle beams ; Laser Diagnostic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The output from a stabilized, tunable single-mode laser is split into two beams which cross the molecular beam perpendicularly and at an angle of β to the beam axis. Tuning the laser frequency across the unshifted and Doppler-shifted absorption profile of the molecular transition yileds the velocity distribution of the molecules in the beam for individual quantum states. The internal state distribution among vibrational and rotational levels in the beam can be determined by comparing the fluorescence simultaneously induced in the beam and in a cell with molecules in thermal equilibrium.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00883672
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  • 2
    Electronic Resource
    Electronic Resource
    Book reviews (1976)
    Springer
    Applied physics 9 (1976), S. A90 
    Details
    ISSN: 1432-0630
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901916
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  • 3
    Electronic Resource
    Electronic Resource
    The accuracy of laser wavelength meters (1985)
    Springer
    Applied physics 38 (1985), S. 1-10 
    Details
    ISSN: 1432-0649
    Keywords: 07.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experimentally obtained accuracy and principal limitations of laser wavelength meters based on two different interferometric designs are discussed. Methods of calibrating these instruments and some experiments for testing their accuracy are presented. Finally, a comparison is given between different kinds of Lambda meters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00691763
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  • 4
    Electronic Resource
    Electronic Resource
    Sensitive amplitude-and phase-modulated absorption-spectroscopy with a continuously tunable diode laser (1994)
    Springer
    Applied physics 58 (1994), S. 137-142 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 33 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The output beam of a continuously tunable GaA1As-diode laser with external cavity is phase-modulated at 800 MHz in an electrooptic LiTaO3 crystal. The amplitude of the rf voltage applied to the EOM is modulated at 80 kHz in order to allow lock-in detection. Using a multipass absorption cell the detection limit of the absorption coefficient α could be pushed down to αmin ≧2 × 10−10 cm2212;1. The sensitivity of the techique is demonstrated by examples of overtone transitions in C2H2 and H2O vapor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082348
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  • 5
    Electronic Resource
    Electronic Resource
    High resolution Fourier spectroscopy and laser spectroscopy of Cs2: The 2 1Σ+g, (C) 2 1Πu, (D) 2 1Σ+u, 3 1Σ+g, and (E) 3 1Σ+u electronic states (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 5265-5281 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ+g, E 1Σ+u →(1)1Πg, E 1Σ+u →(3)1Σ+g, D 1Σ+u →(2)1Σ+g, C 1Σu →X 1Σ+g, and D 1Σ+u →X 1Σ+g transitions of Cs2 have been accurately measured with the techniques of Fourier transform spectroscopy, Doppler-free polarization spectroscopy, and optical optical double resonance. The wave numbers of all these rotational lines were determined with an accuracy of 1 to 5×10−3 cm−1. A thorough and simultaneous analysis of all the measured data yields molecular constants, potential energy curves, and dissociation energies for six different excited electronic states of the Cs2 molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454755
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  • 6
    Electronic Resource
    Electronic Resource
    Autoionizing Rydberg states of Li2: Analysis of electronic–rotational interactions (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 5460-5472 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Highly excited Rydberg states of 7Li2 have been measured by two-step excitation with two narrow band pulsed dye lasers in a collimated lithium beam. A complex many-line two-photon ionization spectrum has been observed which consists of sharp lines whose natural widths are smaller than the laser line width (0.03 cm−1). The spectrum has been analyzed with the help of multichannel quantum defect theory. Radial electronic dipole transition moments for the second excitation step were calculated and provided the key to the analysis. The spectra correspond to the excitation of s and d Rydberg series with n∼18–40. The series are affected by strong rotational l uncoupling as well as electronic s–d mixing. The analysis yields accurate values for the vibrational and rotational constants for the X 2Σ+g state of Li+2 and an improved value of the ionization potential of Li2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455598
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  • 7
    Electronic Resource
    Electronic Resource
    On g factors and hyperfine structure in electronically excited states of NO2 (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 3532-3538 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The combined results of optical radio frequency double resonance and of hyperfine structure measurements in the spectral range around 593 nm show that the variations of hfs splittings within a vibronic band are due to the irregular behavior of the Landé factors in the excited state, rather than caused by variations of the hfs coupling constant OI. The observations can be explained by spin–orbit coupling and vibronic coupling.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453901
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  • 8
    Electronic Resource
    Electronic Resource
    Rotational perturbations between Rydberg states of Li2 (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 5186-5194 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: With two cw single mode dye lasers selective two-step excitation of Rydberg levels of the Li2 molecule is achieved which is detected by optical double resonance polarization spectroscopy. The Doppler-free DR signals allow accurate measurements of rotational perturbations which cause level shifts and intensity anomalies due to interference phenomena. The experimental results are discussed and molecular constants for the deperturbed Rydberg states are given, which, together with the coupling matrix elements allow the accurate reproduction of the measured spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453687
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  • 9
    Electronic Resource
    Electronic Resource
    Rovibrational structures of the pseudorotating lithium trimer 21Li3: Rotationally resolved spectroscopy and ab initio calculations of the A 2E″←X 2E′ system (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 113 (2000), S. 7414-7431 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Based on resonant two-photon ionization of 21Li3 with cw lasers and mass-selective detection of 21Li3+ ions by a quadrupole mass spectrometer, isotope-selective rotationally resolved spectra of vibronic bands in the electronic A 2E″←X 2E′ system have been recorded. The complex but completely resolved spectra could be analyzed using optical–optical double resonance techniques in combination with accurate ab initio calculations which provide potential energy surfaces and rovibronic term values for both electronic states. A detailed comparison between experimental and theoretical results for the (vs′=0, vb′=0, va′=0)←(vs″=0, vb″=0, va″=0) band demonstrates excellent agreement. The coupling between pseudorotation and rotational motion is shown to produce complex level patterns which, however, can be accurately represented by an effective pseudo/rotation Hamiltonian in terms of rotational and coupling constants that directly provide structural information. For both electronic states the nuclear dynamics is adequately described as a motion on a single adiabatic potential surface with a geometric phase π for closed loops around the conical intersection at D3h geometries. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1308091
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  • 10
    Electronic Resource
    Electronic Resource
    Accurate ground state potential of Cs2 up to the dissociation limit (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 5354-5363 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Using the method of Doppler-free double resonance polarization spectroscopy transitions from selectively pumped levels (v', J') of the D1Σ+u state down to levels (v‘, J‘) of the X 1Σ+g state with v‘= 0–140 have been measured with high accuracy. A long range analysis, based on 21 outer turning points of the IPA potential with v‘=110-130 and on calculated exchange energies and second order van der Waals coefficients Cn with n=6, 8, 10, and 12 leads to a dissociation energy De =3649.5±0.8 cm−1 (0.452 49 eV). The influence of the third order C11 contribution and the hyperfine structure on the correct value of De are briefly discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448618
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