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  • 1990-1994  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 340 (1991), S. 415-418 
    ISSN: 1434-601X
    Keywords: 96.60 ; 13.15 ; 25.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract New investigations on the signal-to-background ratio of the geochemical solar neutrino experiment205Tl(v,e−)205Pb using thallium minerals from Allchar (Yugoslavia) are presented. The contributions of several background processes producing205Pb induced by natural radioacitivities, stopped negative muons and fast muons are estimated. The production rate of205Pb by cosmic ray muons, derived from experimental investigations with 120, 200 and 280 GeV muons at the high energy muon channel of CERN, is significantly higher than expected by former estimations. The feasibility of the geochemical205T1 solar neutrino experiment is discussed.
    Type of Medium: Electronic Resource
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  • 2
    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
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  • 3
    ISSN: 1434-601X
    Keywords: 91.00 ; 23.40 ; 28.20.Fc
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present results of the determination of36C1 (T 1/2=3.0·105a) in rock samples produced in situ by cosmic rays and natural radioactivities. These experiments were designed to determine the feasibility of using36Cl for studying erosion processes in calcium rich minerals like limestone or dolomite. The36Cl/Cl ratios in the samples have been determined with accelerator mass spectrometry (AMS) at the Munich accelerator laboratory. A first application is the investigation of the erosion in the last million years in Allchar (Yugoslavia) for the feasibility study of the geochemical205Tl solar neutrino experiment.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 341 (1992), S. 239-242 
    ISSN: 1434-601X
    Keywords: 96.60.Kx ; 25.30.Pt ; 13.15.−f
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Neutrino induced transition rates from205Tl to excited states in205Pb were calculated for neutrino fluxes from the different hydrogen burning reactions in the sun. Suppression factors for electron neutrinos due to flavor oscillations in the sun were obtained. The influence of neutrino oscillations on the neutrino capture rate of205Tl in dependence of the mixing angle and neutrino mass difference is discussed.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 341 (1992), S. 235-238 
    ISSN: 1434-601X
    Keywords: 87.60.M
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For the first time a depth profile of the radioisotope41Ca produced by neutrons from the atomic bomb explosion of Hiroshima was measured. The measurements were performed at the Munich Tandem Laboratory via accelerator mass spectrometry. The41Ca depth profile is part of the evaluation to determine the neutron spectrum of the A-bomb which is basis of the Dosimetry System 1986.
    Type of Medium: Electronic Resource
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