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  • 1
    Electronic Resource
    Electronic Resource
    Simplex s= i excitations in Xe (2000)
    Springer
    The European physical journal 8 (2000), S. 5-7 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 23.20 Lv Gamma transitions and level energies – 21.60.Cs Shell modell – 25.85.Ca Spontaneous fission – 27.60.+j 90 ≤A≤ 149
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Excited levels in 141Xe, populated in spontaneous fission of 248Cm, were studied by means of prompt -ray spectroscopy, using the EUROGAMM2 array. Level scheme of 141Xe obtained in this work shows patterns characteristic of simplex symmetry with s=+i and s=-i bands present but low value of D0 moment indicates that octupole correlations in Xe isotopes are systematically lower than in Ba nuclei.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070113
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  • 2
    Electronic Resource
    Electronic Resource
    Shapes of the neutron-rich 88-94Kr nuclei (2000)
    Springer
    The European physical journal 9 (2000), S. 165-169 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 21.10.-k Properties of nuclei; nuclear energy levels – 23.20.Lv Gamma transitions and level energies – 25.85.Ca Spontaneous fission – 27.60.+j 90 ≤A≤ 149
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Neutron-rich, 88-94Kr nuclei, populated in spontaneous fission of 248Cm, have been studied with EUROGAM 2, by measuring prompt γ-rays. Many new excited states in even-even Kr isotopes have been identified. For the first time spins and parities were determined experimentally in these nuclei. Our results indicate that the quadrupole deformation of Kr isotopes will appear only above N = 58, as observed in Sr and Zr nuclei. The newly found 3- level at 1506.4 keV in 90Kr suggests the exsistence of a new region of increased octupole correlations, probably associated with the ν(d 5/2 h 11/2) pair of Δl = Δj = 3 orbitals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070033
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  • 3
    Electronic Resource
    Electronic Resource
    Properties of N=84, even-even nuclei populated in the spontaneous fission of 248Cm (2000)
    Springer
    The European physical journal 7 (2000), S. 167-176 
    Details
    ISSN: 1434-601X
    Keywords: PACS: 21.60.Cs Shell model – 23.20.Lv Gamma transitions and level energies – 27.80.+w 190 ≤ A ≤ 219 – 25.70.-z Low and intermediate energy heavy-ion reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Excited states in the neutron-rich, N=84 nuclei 134Sn, 136Te and 138Xe, populated in the spontaneous fission of 248Cm, were studied to medium spins using the EUROGAM2 array. OXBASH code calculations support the experimental identification of maximum aligned configurations in these isotopes. Empirical shell model calculations agree with the proposed excitation energy of the neutron h9/2 excitation in the 132Sn region. A discrepancy between the observed and calculated excitation energy of the Iπ= 12+ level in 136Te indicates possible admixtures of collective excitations in this nucleus. Clear signs of collective excitations are observed in 138Xe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00013594
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  • 4
    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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    Paper (German National Licenses)
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