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  • 1
    Electronic Resource
    Electronic Resource
    High resolution Fourier transform emission spectrum of the (2) 3Πg–A 3Πu transition of the B2 molecule (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 7928-7937 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The (2) 3Πg–A 3Πu system of B2 has been characterized for the first time. A full rotational analysis of the 0–0, 0–1, 1–0, and 1–3 bands has been performed. The molecular parameters are compared with recent high level theoretical calculations and show good agreement. An extensive perturbation of the upper (2) 3Πg state by the (1) 3Πg state was observed. This was most clearly evident for v=0 of the (2) 3Πg state for the 10B11B isotopomer, which is split into two components by the interaction with v=7 of (1) 3Πg. The perturbation interaction exhibited a significant rotational dependence, which was interpreted as arising from a change in the Franck–Condon factors as the rotational contribution to the potential changed. A weak local perturbation was observed in v=1 of the A 3Πu state from a crossing with v=2 of the a 5Σ−u state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.466838
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  • 2
    Electronic Resource
    Electronic Resource
    Fourier transform detection of laser-induced fluorescence from the CCN free radical (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 3078-3081 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The technique of high-resolution Fourier transform spectroscopy has been used to detect the laser-induced fluorescence spectrum of the CCN free radical. Emission from a single vibronic level in the A˜ 2Δ state to the X˜ 2Π state yielded rotational constants for several vibronic levels of the ground state. From the analysis of the 0v21 levels the size of the Renner–Teller interaction was determined, yielding ε=0.410.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452018
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  • 3
    Electronic Resource
    Electronic Resource
    Rotational analysis of the B˜ 2Σ+–X˜ 2Σ+ transition of BaOH and BaOD (1986)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 698-708 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The B˜ 2Σ+–X˜ 2Σ+ transitions of BaOH and BaOD were studied by the technique of dye laser spectroscopy. The 000–000 and 001–000 bands of BaOH and 000–000 band of BaOD were rotationally analyzed. The B˜ 2Σ+ state is perturbed by the A˜ 2Π state and each parity (e/f) component of the B state was fit separately. BaOH is a linear molecule with r0(Ba–O)=2.201 A(ring) and r0(O–H)=0.923 A(ring). The X˜ 2Σ+ vibrational frequencies for BaOH (BaOD) are 492.4 (482.4) cm−1 for Ba–O stretch and 341.6 (257.6) cm−1 for the bend.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.450566
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  • 4
    Electronic Resource
    Electronic Resource
    Observation of gas phase organometallic free radicals: Monomethyl derivatives of calcium and strontium (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 5918-5922 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have observed the organometallic free radicals CaCH3 and SrCH3 by the gas phase reaction of Ca or Sr metal vapor with Hg(CH3)2 and several other CH3 containing oxidants. The positions of the A˜ 2E–X˜ 2A1 and B˜ 2A1–X˜ 2A1 transitions were determined, as well as several vibrational frequencies. The observation of predissociation in the A˜ 2E state gives an upper limit of 46 kcal/mol (43 kcal/mol) to the bond dissociation energy for CaCH3 (SrCH3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452476
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  • 5
    Electronic Resource
    Electronic Resource
    Laser spectroscopy of organometallic free radicals (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1043-1045 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A large number of novel organometallic radicals have been observed by laser induced fluorescence spectroscopy. These species were produced by the gas phase reaction of calcium and strontium with various aldehydes, ketones, alcohols, and carboxylic acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448573
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  • 6
    Electronic Resource
    Electronic Resource
    The infrared spectrum of XeH+ (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 159-162 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Fourier transform emission spectrum of XeH+ was observed in the infrared region of the spectrum. The 1–0 and 2–1 vibration–rotation bands for 132XeH+, 131XeH+, and 129XeH+ were recorded from a nickel hollow cathode discharge in xenon and hydrogen. Molecular constants, including Re=1.602 813(6) A(ring), Be=6.560 686(50), αe=0.186 739(14), ωe=2269.9674(11), and ωexe=41.328 30(34) cm−1 for 132XeH+, were extracted from the line positions. Our work represents the first high-resolution detection of XeH+.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453611
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  • 7
    Electronic Resource
    Electronic Resource
    Fourier transform spectroscopy of the ν3 band of the N3 radical (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 1762-1767 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have analyzed the ν3 antisymmetric stretching fundamental of the N3 radical. Azide radicals N3 were generated in a multipass cell by the reaction of Cl atoms and HN3 and detected in absorption using a Fourier transform spectrometer. Improved constants for the 000 vibrational level of X˜ 2Πg are reported along with observations of the 001 level. The frequency of the ν3 fundamental at 1645 cm−1 was found to be somewhat lower than expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455122
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  • 8
    Electronic Resource
    Electronic Resource
    Fourier transform emission spectroscopy of the jet-cooled CCN free radical (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 92 (1990), S. 2244-2247 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The A˜ 2Δ–X˜ 2Π electronic transition of the CCN free radical was observed in emission with a high-resolution Fourier transform spectrometer. The CCN was jet-cooled in a corona-excited supersonic jet expansion of diazoacetonitrile (HC(N2)CN) in helium. From the 000–000, 000–001, 000–002, and 000–100 vibronic bands spectroscopic constants were derived including the ground-state vibrational frequencies, ν3=1050.7636(6), 2ν3=2094.8157(18), and ν1=1923.2547(69) cm−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458016
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  • 9
    Electronic Resource
    Electronic Resource
    The A˜ 2E–X˜ 2A1 transition of monomethyl calcium: A rotational analysis (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4548-4554 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The 000 band of the A˜ 2E–X˜ 2A1 transition of CaCH3 has been rotationally analyzed at Doppler-limited resolution by laser excitation spectroscopy. Observation of an internal perturbation in the excited state permitted simultaneous determination of both A' and A‘. The ground-state molecular structure was found to be RCa–C=2.349(13) A(ring) and θH–C–H=105.6(28)° with RC–H fixed at 1.100(20) A(ring).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456742
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  • 10
    Electronic Resource
    Electronic Resource
    Rotational analysis of the 000 band of the A˜ 3E–X˜ 3A2 system of methylnitrene (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 919-926 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The optical emission spectrum of the methylnitrene radical has been observed at a resolution of 0.07 cm−1. Transitions to subbands with K up to 3 in the X˜ 3A2 ground state were observed and a full rotational analysis carried out. Comparison of the structural information with the highest level theoretical calculations shows agreement to within the estimated error.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462113
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