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  • 33.20  (2)
  • 21.10.-k  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Study of band structures and crossings in179Re (1989)
    Springer
    The European physical journal 334 (1989), S. 385-395 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.-k ; 23.20.-g ; 27.70.+q
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract High-spin states in179Re have been populated by the165Ho(18O, 4n) and170Er(14N,5n) reactions. A level scheme is constructed from the studies ofγγ-coincidences using anti-Compton spectrometer arrays. The previously known 5/2+[402], 1/2− [541] and 9/2− [514] bands have been extended to 35/2+, 45/2− and 39/2−, respectively. In addition a 1/2+ [660] band, a three-quasiparticle band and two isomers were established. Furthermore several level sequences were identified decaying into the 5/2+ [402] and 1/2− [541] bands. This allowed to determine the excitation energy of the 9/2− member of the latter band. The band crossing features of the bands have been explained as the rotation alignment of ani 13/2 quasineutron pair taking into account shape changes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294744
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  • 2
    Electronic Resource
    Electronic Resource
    Computer controlled diode laser spectrometer with a helium evaporation cryostat and spectroscopy of thev 3 vibration of NCO (1989)
    Springer
    Applied physics 48 (1989), S. 105-110 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 33.20
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A computer-controlled diode laser spectrometer for the 1200 to 2500 cm−1 spectral region is described. The spectrometer has been applied to high resolution spectroscopy of the NCO radical at 5.2 μm. The lead-salt diode lasers are cooled to their operating temperature with a temperature adjustable helium evaporation cryostat. Computer-controlled tuning procedures for the frequency tuning of the diode lasers have been developed; they are independent of tables describing the tuning characteristics of the diode lasers. 41 lines of the antisymmetric stretching-vibrationv 3 of the linear NCO radical have been observed. We were able to detect vibration-rotation transitions in both2 π 1/2 and2 π 3/2 fine structure sublevels. These measurements led to the precise determination of additional molecular constants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692134
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The CO fundamental-band laser as secondary frequency standard at 5 µm (1994)
    Springer
    Applied physics 59 (1994), S. 159-166 
    Details
    ISSN: 1432-0649
    Keywords: 33.20 ; 07.65.Gj ; 42.72
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a very high-resolution heterodyne spectrometer based on a CO laser which operates down to fundamental-band transitions of the molecule. This allows us to detect saturated absorption signals on these transitions at very low pressure (0.4 Pa) and laser intensity (〈 1 mW/cm2), yielding a linewidth of about 250 kHz. With the CO fundamental-band laser stabilized to these saturation signals we have measured the transition frequencies of the fundamental bands of three isotopic species to an accuracy of typically 20 kHz (Δv/v ≈ 3 × 10−10), referenced to the CO2 frequency standard. Together with additional frequency measurements of the first hot bands, these provide the first heterodyne frequency data of sub-Doppler accuracy for transitions in low lying bands of CO. They now represent the most accurate secondary frequency standard in the spectral region around 5 µm (60 THz).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01081166
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    Paper (German National Licenses)
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