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in Paris

INFN Bari N. Colonna G. Tagliente INFN Trieste K. Fujii P.M. Milazzo C. Moreau ITN Lisboa L.Marques P.Vaz. R. in Paris. Zirconium capture measurements: data analysis results, perspectives.

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in Paris

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  1. INFN Bari N. Colonna G. Tagliente INFN Trieste K. Fujii P.M. Milazzo C. Moreau ITN Lisboa L.Marques P.Vaz R in Paris Zirconium capture measurements: data analysis results, perspectives

  2. Physics cases-process analysis of great interest in stellar modeling (e.g. evolution of Red Giant stars)nuclear reactor design purpose nuclear waste transmutation 90 neutron magic number (N=50) Act as a bottle neck for the reaction flow towards heavier elements 90, 91, 92, 93, 94 Low-neutron capture cross sections, predominantly of s-process origin (existing data have uncertainties larger than 10%) 93 radioactive isotope One of the major long-lived fission products (T½ = 1.5 Myr) Used in reactor’s structural materials 96 r-process only Relevant in the study of pulsing AGB stars

  3. Physics case, Nuclear Astrophysics (n,g) x-sections of Zr Bottleneck in the s-process flow at N=50 neutron magic number Small x-sections Normalization of s-process abundance Probing the neutron exposure and neutron flux in Red Giant Stars TOF 08

  4. Zr capture Yields Zr Yield Overall background Stable isotopes, 2003 93Zr 93Zr Natural radioactivity of the sample

  5. Resonance analysis 2 4 3 1 3 4 1 2 Zr-92 data Resonance Fit Normalization 197Au 4.9eV N.F.(92Zr)=0.6219 SAMMY fit of 92Zr Estimated resonance parameters E, Γg, Γn

  6. Resonance analysistypical examples 94Zr En=58.7keV 90 91 96 94 … multiple scattering correction, Doppler broadening and instrumental resolution were included in the analysis

  7. Data analysis Sntof14%lower than the previous data Gnntof7%lower than the previous data

  8. Data analysis Sntof19%lower than the previous data Gnntof3%lower than the previous data

  9. Data analysis Sntof14%lower than the previous data Gnntof1%lower than the previous data

  10. Data analysis Sntof4%higher than the previous data Gnntof3%higher than the previous data

  11. Data analysis Sntof25%lower than the previous data Gnntof12%lower than the previous data

  12. Data analysis Mughabghab 2006 Mughabghab 1986

  13. Data analysis

  14. Data analysisMACS @ 30 KeV

  15. Data analysisMACS @ 30 KeV

  16. Data analysisMACS @ 30 KeV

  17. Data analysisopen questions 96Zr Analysis

  18. Data analysisopen questions 91 on 91 sample 91 on 96 sample En = 893.3 eV ΔS/S ~ 1% En = 681.7 eV ΔS/S ~ 13% not related to wrong sample components definition

  19. (almost) ready to publish how to proceed? • A paper for each isotope (because of the difference in Gg) • Two papers of the Astrophysics implication of all stable isotopes

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