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  • Articles: DFG German National Licenses  (3)
  • PACS. 13.60.Le Meson production – 25.20.Lj Photoproduction reactions  (2)
  • 65C05  (1)
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  • Articles: DFG German National Licenses  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    A one-table method for sampling from continuous and discrete distributions (1995)
    Springer
    Computing 54 (1995), S. 127-146 
    Details
    ISSN: 1436-5057
    Keywords: 65C10 ; 65C05 ; Random number generation ; table method ; acceptance-rejection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Description / Table of Contents: Zusammenfassung Für die Erzeugung von Stichproben aus weitgehend beliebigen VerteilungenF mit Dichtefunktionenf(x) oder Wahrscheinlichkeitenp k (in diskreten Fällen) wird eine praxisnahe Methode entwickelt. Die hohe Effizienz der Stichprobengewinnung wird mittels einer einzigen Hilfstafel erreicht, die eine Unterteilung des Bereiches vonF enthält. Beispiele stetiger und diskreter Verteilungen zeigen, daß die Prozedur einfach zu handhaben ist und daß ihre Geschwindigkeit nicht sehr von der speziellen VerteilungF abhängt.
    Notes: Abstract A practical method for sampling from largely arbitrary distributionsF with density functionsf(x) or probabilitiesp k (in discrete cases) is developed. The high efficiency of the sampling routine is achieved by means of only one auxiliary table which contains a subdivision of the range ofF. Examples of continuous and discrete distributions demonstrate that the procedure is easy to apply and that its speed does not much depend on the particular target distributionF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02238128
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Double- π0 photoproduction from the deuteron (2000)
    Springer
    The European physical journal 9 (2000), S. 1-4 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 13.60.Le Meson production – 25.20.Lj Photoproduction reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: The photoproduction of two neutral pions from the deuteron has been studied for incident photon energies from 200 MeV to 820 MeV with the TAPS spectrometer at MAMI (Mainz Microtron). The total cross-section was determined and used to deduce the cross-section from the neutron. Due to the good statistical quality of the data Dalitz plots for the three particles in the exit channel (π0π0 N) could be constructed. The invariant mass distributions derived from them are presented in this paper. They indicate that the important reaction mechanism in the second resonance region is a sequential decay pattern involving the population of the Δ(1232)-resonance as an intermediate state.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070047
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Photoproduction of neutral pion pairs from the proton (2000)
    Springer
    The European physical journal 9 (2000), S. 5-8 
    Details
    ISSN: 1434-601X
    Keywords: PACS. 13.60.Le Meson production – 25.20.Lj Photoproduction reactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: Double neutral pion photoproduction from the proton has been measured at MAMI for photon energies between threshold and 820 MeV. The reaction was identified by an invariant mass and missing mass analysis. From threshold up to 370 MeV the total cross-section does not exceed 30 nb. For higher energies it shows a smooth rise until it reaches a maximum of about 10 μb at E γ = 740 MeV. Dalitz plots of m 2(π0π0) versus m 2(p,π0) for seven bins of incident photon energy have been analysed. For E γ 〉 610 MeV, a strong contribution of a sequential decay is observed with the Δ(1232)-resonance as intermediate state. A comparison to model calculations shows that these sequential decays presumably originate from the D 13(1520) and also the P 11(1440)-resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s100500070048
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    Paper (German National Licenses)
    Fulltext
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