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  • 1
    Electronic Resource
    Electronic Resource
    Nuclear levels in228Th populated in the decay of228Pa (1995)
    Springer
    The European physical journal 352 (1995), S. 47-67 
    Details
    ISSN: 1434-601X
    Keywords: 23.20 ; 25.40 ; 27.90.+
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The electron-capture decay of228Pa to levels in228Th has been studied using mass-separated sources and high-resolutionγ-ray and conversion-electron spectroscopy. A level at 979.5 keV is assigned as 2+ member of a second excited Kπ=0+ band, with the 0+ band head at 938.6 keV. The 2+ and 3+ members of a second excited Kπ=2+ band at 1153.5 and 1200.5 keV, which decay by strongE0 transitions to the 969 keVγ-vibrational band, are confirmed. In addition we tentatively propose a Kπ=1+ band at 944 keV. The Kπ=0−, 1− and 2− members of the octupole quadruplet are confirmed, and theγ decay of these levels is analysed in an approach, in which the mixing of the octupole bands by the Coriolis interaction is taken into account. It is suggested that octupole correlations might be important for theE1 transition moments. A total of 29 levels is observed between ∼1.4 and ∼2.0 MeV, for which the nuclear structure, and the possible assignment to rotational bands, is unclear.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292760
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Filtering of temporal parameters of the calling song by cricket females of two closely related species: a behavioral analysis (1997)
    Springer
    Journal of comparative physiology 180 (1997), S. 621-630 
    Details
    ISSN: 1432-1351
    Keywords: Key words Calling song  ;  Phonotaxis  ;  Pattern recognition  ;  Cricket ; Teleogryllus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The phonotactic response of cricket females was investigated on a locomotion compensator to determine the temporal parameters of the male's calling song which are important for species recognition. Two sympatric species (Teleogryllus commodus, T. oceanicus) that show different syllable periods in the chirp and trill parts of their calling songs were used. By their responses T. commodus females exhibited two temporal filters for syllable periods, which were tuned to the species-specific syllable periods occurring during chirp and trill. For song recognition both filters had to be activated and for both a minimum number of three to five consecutive syllable periods was necessary. In contrast, T. oceanicus females showed only one sharply tuned filter corresponding to the chirp part of the male's calling song. This filter was sufficient for calling song recognition. Syllable periods of the trill part also influenced calling song recognition, but these played only a minor role. Carrier frequency was also important for positive phonotaxis. Calling song recognition by T. commodus females is largely based on central nervous processing, while for T. oceanicus both peripheral frequency filtering and central temporal filtering is important.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003590050078
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    Paper (German National Licenses)
    Fulltext
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