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  • 1980-1984  (2)
  • 1980  (2)
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  • 1980-1984  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    PräziseQ β -Wert-Messungen mit einem Intrinsic-Germanium Detektor an leichten, neutronenreichen Spaltprodukten (1980)
    Springer
    The European physical journal 294 (1980), S. 35-49 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An intrinsic Germanium detector of 10 mm depth and 300 mm2 sensitive area has been used to determineβ-endpoint energies for Rb, Sr and Y fission products. It was calibrated with monoenergetic electrons supplied by a magnetic conversion electron spectrometer for the energy range from 1.6 to 8 MeV. The energy calibration of the detector is linear with deviations less than 2 · 10−4, and the detector was recalibrated daily using precisely known gamma rays of90Rb. At the on-line fission product separator OSTIS at the ILL, Grenoble the endpoints ofβ-singles-spectra have been determined andQ-values deduced if possible also from beta-gamma coincidence measurements. The obtainedQ-values are:88Rb:(5 318±4) keV,89Rb: (4 510 ± 8) keV,90Rb: (6 578 ± 15) keV,91Rb: (5 857 ± 8) keV,91Sr: (2 704.5 ±3) keV,92Rb: (8 111 + 15) keV,93Rb:(7 485 ± 15) keV,94Rb: (10 304 ± 30) keV,94Sr: (3 512 ± 5) keV,94Y: (4 920 ±5)keV,95Rb: (8 947 ±100) keV,95Y: (4 445±5) keV,96Rb: (11 303±250) keV,96Sr: (5 413±20) keV,96Y: (7 120 ±50) keV,97Rb: (10 020 ±50) keV.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01473120
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  • 2
    Electronic Resource
    Electronic Resource
    The thermal-neutron-induced alpha-accompanied fission of235U investigation of the low energy part of the alpha spectrum (1980)
    Springer
    The European physical journal 298 (1980), S. 219-223 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The energy spectrum of the α-particles emitted in the thermal-neutron induced fission of235U was measured from 11.5 MeV down to 2 MeV using the parabola mass spectrometer Lohengrin at the I.L.L. high flux reactor. This low energy part of the energy spectrum presents a smooth connection with the energy spectra which have been recently reported above 7 MeV. The overall energy spectrum, which is known to be quasi-gaussian above 12 MeV, is slightly asymmetric at low energy, where the observed particles are 6% more than expected from a gaussian shape. As a consequence, all the values reported for235U for the rate of α-accompanied fission compared to binary fission have to be multiplied by 1.06. This asymmetry is about 2 times less important than the one reported for252Cf. No evidence was seen for any intense low energy component as reported before. The possible reasons for the existence of this asymmetry are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01418660
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    Paper (German National Licenses)
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