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Träfflista för sökning "WFRF:(Fülöp Z) srt2:(2005-2009)"

Search: WFRF:(Fülöp Z) > (2005-2009)

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1.
  • Imbriani, G., et al. (author)
  • S-factor of 14N(p,γ)15O at astrophysical energies
  • 2005
  • In: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 25:3, s. 455-466
  • Journal article (peer-reviewed)abstract
    • The astrophysical S(E) factor of 14N(p,γ)15O has been measured for effective center-of-mass energies between E eff = 119 and 367 keV at the LUNA facility using TiN solid targets and Ge detectors. The data are in good agreement with previous and recent work at overlapping energies. R-matrix analysis reveals that due to the complex level structure of 15O the extrapolated S(0) value is model dependent and calls for additional experimental efforts to reduce the present uncertainty in S(0) to a level of a few percent as required by astrophysical calculations. © Società Italiana di Fisica / Springer-Verlag 2005.
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2.
  • Marta, M., et al. (author)
  • Precision study of ground state capture in the 14N(p,γ)15O reaction
  • 2008
  • In: Physical Review C. Nuclear Physics. - 0556-2813 .- 1089-490X. ; 78:2
  • Journal article (peer-reviewed)abstract
    • The rate of the hydrogen-burning carbon-nitrogen-oxygen (CNO) cycle is controlled by the slowest process, 14N(p,γ)15O, which proceeds by capture to the ground and several excited states in O15. Previous extrapolations for the ground state contribution disagreed by a factor 2, corresponding to 15% uncertainty in the total astrophysical S factor. At the Laboratory for Underground Nuclear Astrophysics (LUNA) 400 kV accelerator placed deep underground in the Gran Sasso facility in Italy, a new experiment on ground state capture has been carried out at 317.8, 334.4, and 353.3 keV center-of-mass energy. Systematic corrections have been reduced considerably with respect to previous studies by using a Clover detector and by adopting a relative analysis. The previous discrepancy has been resolved, and ground state capture no longer dominates the uncertainty of the total S factor. © 2008 The American Physical Society.
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3.
  • Trautvetter, H P, et al. (author)
  • Ground state capture in 14N(p,γ)15O studied above the 259 keV resonance at LUNA
  • 2008
  • In: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 35:1
  • Journal article (peer-reviewed)abstract
    • We report on a new measurement of 14N(p,γ)15O for the ground state capture transition at Ep = 360, 380 and 400 keV, using the 400 kV LUNA accelerator. The true coincidence summing effect - the major source of error in the ground state capture determination - has been significantly reduced by using a Clover-type gamma detector. © 2008 IOP Publishing Ltd.
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  • Result 1-3 of 3

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