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  • 1980-1984  (3)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Thermal neutron induced α-particle reaction on64, 65, 67Zn and77Se (1984)
    Springer
    The European physical journal 315 (1984), S. 201-204 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The (n th,α) reaction spectroscopy was done on64, 65, 67zn and77Se at the 87 m curved thermal neutron guide of the Grenoble high flux reactor. In each of the64Zn(n, α)61 Ni and67 Ni(n, α) 64Ni reactions, one line showed up corresponding to anα-particle transition to the first excited state in61Ni and64Ni withσ α1=11±3 μb and 159±20 μb respectively. In the case of the radioactive65Zn(T 1/2=244d) nucleus, two lines showed up corresponding to the ground state and the first excited state transitions in62Ni with large values ofσ α0=1.0±0.1b andσ α1=1.0±0.1b. For the77Se(n, α)74Ge reaction, the ground state and first excited transitions were present withσ α0=940±20 μb andσ α1 = 30±5 μb respectively. The spin-parity (J π) of the neutron resonance contributing at thermal energy are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419380
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Charge distribution in fission — a quantum mechanical phenomenon (1980)
    Springer
    The European physical journal 296 (1980), S. 79-80 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that the charge varianceσ z 2 observed in the low energy fission is consistent with the quantum mechanical zero point motion of an isovector giant dipole resonance. Theσ z 2 is determined at the ‘exit point’, where the neck radius ≈2.4 fm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415618
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    Paper (German National Licenses)
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  • 3
    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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