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  • 1
    Electronic Resource
    Electronic Resource
    A new c.w. CO laser: simultaneous double-wavelength operation of tunable CO laser (1989)
    Springer
    Optical and quantum electronics 21 (1989), S. 233-234 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract We demonstrate simultaneous two wavelength operations of a cooled CO laser. Tunable operations over seven vibrational bands is achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02192004
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  • 2
    Electronic Resource
    Electronic Resource
    First observation of the ν9/2[404] orbital in the A ∼ 100 mass region (2003)
    Springer
    The European physical journal 16 (2003), S. 11-15 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 23.20.Lv Gamma transitions and level energies – 21.60.Cs Shell model – 25.85.Ca Spontaneous fission – 27.60.+j 90 ⩽ A ⩽ 149
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A new band, populated by the spontaneous fission of 248Cm and studied by means of prompt γ-ray spectroscopy using the EUROGAM2 array, was observed in 99Zr. The 1038.8 keV band head with a half-life T 1/2 = 54(10) ns is interpreted as a K-isomer, corresponding to the 9/2[404] neutron-hole excitation. It is the first observation of this orbital in the mass A ∼ 100 region. The quadrupole moment, Q 0 = 3.9(3) eb deduced for the new band indicates a large deformation of β = 0.41, which is produced by a specific shape-coexistence mechanism, known in other regions and now found in the A ∼ 100 nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2002-10104-y
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  • 3
    Electronic Resource
    Electronic Resource
    Two-quasiparticle bands in neutron-rich nuclei (2003)
    Springer
    The European physical journal 20 (2003), S. 97-100 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. The large multi-detector arrays such as EUROBALL and GAMMASPHERE have made possible the study of the spectroscopy of neutron-rich nuclei through the observation of discrete, prompt $\gamma$ -rays emitted following fission. Most of the information obtained has concerned yrast states and collective excitations. In the present work, a search has been made for excited bands based upon two-quasiparticle intrinsic structures. Such bands have been found in several even-even nuclei from 96Sr to 112Pd. Careful analysis of triple-coincidence spectra has been performed in order to determine branching ratios within the bands. These branching ratios are then used to establish the magnetic properties of the intrinsic structure, permitting, in most cases, the determination of which Nilsson orbits (and whether they are neutron or proton states) are contributing to the excitation. Some example results from this search are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1140/epja/i2002-10330-3
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  • 4
    Electronic Resource
    Electronic Resource
    A Faraday Laser Magnetic Resonance spectrometer for spectroscopy of molecular radical ions (1985)
    Springer
    Applied physics 36 (1985), S. 1-4 
    Details
    ISSN: 1432-0649
    Keywords: 33 ; 35
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe a mid-infrared Laser Magnetic Resonance (LMR) spectrometer which is based on a cryomagnet and a sealed-off CO-laser. Faraday rotation combined with a multireflection cell is used for polarization sensitive detection of molecular radical ions. Experimental details and first spectroscopic examples are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698028
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  • 5
    Electronic Resource
    Electronic Resource
    CO laser stabilization using the optogalvanic Lamb-dip (1987)
    Springer
    Applied physics 44 (1987), S. 241-245 
    Details
    ISSN: 1432-0649
    Keywords: 42.60.By ; 42.55.Hq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Frequency stabilization of the CO laser using a CO lamb-dip is achieved in the range from 5.0–6.3 μm. The CO saturation signal is obtained from a low-pressure discharge in absorption and is detected using optogalvanic, detection. The frequency stability and reproducibility has been verified to be better than 100 kHz; this is an improvement of more than one order of magnitude compared with locking techniques using CO laser gain profiles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692127
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  • 6
    Electronic Resource
    Electronic Resource
    Simultaneous two-line operation of a CW CO laser with arbitrary choice of laser transitions (1988)
    Springer
    Applied physics 45 (1988), S. 13-16 
    Details
    ISSN: 1432-0649
    Keywords: 42.60.Da ; 33.80.B
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An experimental scheme is discussed, by which we can operate a CO laser at two individually selectable lines from the same gain tube. There are virtually no restrictions on the wavelength separation of the two lines within the manifold of the available lasing transitions. Experimental verifications of this scheme are described and the mutual influence of the simultaneous laser operation is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692334
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  • 7
    Electronic Resource
    Electronic Resource
    A simple model for the velocity modulation detection technique of molecular ions (1989)
    Springer
    Applied physics 48 (1989), S. 235-242 
    Details
    ISSN: 1432-0649
    Keywords: 35.80.+s ; 33.70.−w
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a simple model to describe the line-profile of velocity modulated ions. This model is based on Langevin's theory of the mobility and on the independence of the electric field strength on the discharge current in the ideal positive column. A comparison of time constants responsible for the drift of the ions, the concentration, and the ignition and extinction of the discharge itself is essential for a rough understanding of the velocity modulation. The behaviour of H3O+ ions in an ac glow discharge was examined. Under our experimental conditions the line-profile can be explained by a temporal dependence of the velocity which is close to a square-wave. Due to this particular temporal dependence the amplitude of the signal only depends on the concentration modulation, while the line-shape is a simple difference line-profile.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694351
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  • 8
    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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  • 9
    Electronic Resource
    Electronic Resource
    On-line monitoring of biogenic isoprene emissions using photoacoustic spectroscopy (2000)
    Springer
    Applied physics 70 (2000), S. 275-280 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.55; 42.62; 82.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Isoprene (C5H8) is one of the most important biogenic volatile organic compounds (VOCs) in the atmosphere. To calculate the impact of isoprene on atmospheric processes models have been developed that describe the isoprene release from plants. Measurements of this release require techniques for a fast, sensitive, on-line isoprene detection. Photoacoustic (PA) spectroscopy is applied here for the first time to monitor biogenic isoprene emissions. A CO overtone PA spectrometer is used for the detection, probing the C-H stretching vibrations in the 3 to 4 μm range. This allows us to detect isoprene down to a few ppb with a time resolution of one minute in a continuous gas flow. The number of laser lines can be adjusted to meet the requirements of the respective experiment in terms of time resolution and selectivity against other possibly interfering VOCs. This results in a highly versatile instrument for the isoprene detection in biological experiments. Furthermore, the infrared fingerprint offers the potential to detect different isoprene isotopomers simultaneously, thus allowing us to carry out on-line labelling experiments. The new apparatus was used to study the light dependence of isoprene emission from Eucalyptus globulus. The results demonstrate, that the detector system is a promising tool for the study of plant gas emissions. It allows the validation of existing emission models which are important for atmospheric processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050045
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  • 10
    Electronic Resource
    Electronic Resource
    Origin of the backbending in theπh 9/2 band of185Ir (1989)
    Springer
    The European physical journal 332 (1989), S. 111-112 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Highspin states of185Ir were excited in the187Re(α,6n) reaction and measured with the OSIRIS spectrometer. The first backbending in theπhx9/2 band was found at a rotational frequency of ħω=0.40 MeV. Blocking arguments suggest that this is due to the alignment of an h9/2 quasiproton pair.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292590
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