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  • 11.30.Ly  (1)
  • 27.60.+j  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Test of the Pauli exclusion principle for nucleons and atomic electrons by accelerator mass spectrometry (1991)
    Springer
    The European physical journal 340 (1991), S. 411-413 
    Details
    ISSN: 1434-601X
    Keywords: 11.30.Ly ; 36.10.−k ; 7.75+h
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Pauli exclusion principle was tested by searching with accelerator mass spectrometry for non-Paulian atoms with three electrons in theK-shell and for non-Paulian nuclei with three protons or three neutrons in the nuclear 1 s1/2 shell. For non-Paulian atoms of $${}^{20}\widetilde{Ne}$$ and $${}^{36}\widetilde{Ar}$$ the following limits have been obtained: $$N({}^{20}\widetilde{Ne})/N({}^{20}Ne)〈 2 \cdot 10^{ - 21}$$ and $$N({}^{36}\widetilde{Ar})/N({}^{36}Ar)〈 4 \cdot 10^{ - 17}$$ . For non-Paulian nuclei of $${}^5\widetilde{Li}$$ and $${}^5\widetilde{He}$$ with three protons or three neutrons, respectively, in the nuclear 1 s1/2 shell the following limits have been measured: $$N({}^5\widetilde{Li})/N({}^6Li)〈 0.8 \cdot 10^{ - 17}$$ for a range of proton separation energies of $${}^5\widetilde{Li}$$ between 0 and 50 MeV and $$N({}^5He)/N({}^4He)〈 2 \cdot 10^{ - 15}$$ for neutron separation energies between 0 and 32 MeV. The result for5Li is used to deduce a limit for the probability β2/2 of finding two colliding protons in the symmetric state with respect to exchange to be β2/2〈0.5.10−32.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290329
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  • 2
    Electronic Resource
    Electronic Resource
    Groundstate proton radioactivity of nuclei in the tin region (1987)
    Springer
    The European physical journal 326 (1987), S. 107-119 
    Details
    ISSN: 1434-601X
    Keywords: 23.90.+w ; 27.60.+j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Proton radioactivities with decay energies of (0.98±0.08) MeV and (0.83±0.08) MeV were produced by the fusion reactions58Ni+58Ni→116Ba ⋆ and58Ni+54Fe→112Xe ⋆, and their halflives were measured to be (33±7) μs and (109±17) μs, respectively. The intensities of the lines correspond to production cross sections of about 30 μb and 40 μb. The two activities are assigned to the direct proton decay of113Cs and109I. The measured halflives are compared with values calculated ford 5/2 andg 7/2 groundstates of109I and113Cs and spectroscopic factors are deduced for the decays. An extensive search for the proton decay of105Sb, produced in the reaction50Cr(58Ni,p2 n)105Sb, had a negative result, excluding decay energies between 0.5 MeV and 1.5 MeV for halflives between 10 ns and 5 s.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294577
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    Paper (German National Licenses)
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