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Evaluation of n+Cr cross section data up to 200 MeV neutron energy including covariances

Evaluation of n+Cr cross section data up to 200 MeV neutron energy including covariances. P.Pereslavtsev, A. Konobeyev, L. Leal, U. Fischer. Objectives. Improvements of the nuclear model simulations based on the TALYS code.

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Evaluation of n+Cr cross section data up to 200 MeV neutron energy including covariances

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  1. Evaluation of n+Cr cross section data up to 200 MeV neutron energy including covariances P.Pereslavtsev, A. Konobeyev, L. Leal, U. Fischer

  2. Objectives • Improvements of the nuclear model simulations based on the TALYS code. • Calculations of the covariances up to 200 MeV using Unified Monte Carlo approach. • Inclusion in the files the new data for resonance region. • Preparation of the neutron transport data files for Cr-50,53,54 isotopes for incident energies up to 200 MeV. • Benchmarking of the newly developed neutron data files. • Compilation of the integral experimental data on Cr. • MCNP benchmark transport calculations. • Correction of the evaluated data if necessary. 23-26 March 2010, IAEA, Vienna

  3. Nucelar model calculations • TALYS-1.0 code was used for the nuclear modles calculations up to 200 MeV incident neutron energies • GDH model for the preequlibrium reactions was included in the code • The detailes are reported by A. Konobeyev (EFFDOC-1102) • GDH model is included in TALYS as an option (preeqmode 5) • TALYS executable and source files are available • Global OMPs for deuterons, tritons, helions and alphas are used instead of folding approach • Generalised superfluid model for level densities • The set of the best model parameters was found on the basis of the optimization procedure (Monte Carlo simulations) 23-26 March 2010, IAEA, Vienna

  4. Quality assurance of the evaluated data • TALYS code for the nuclear model calculations • Well proved nuclear models • Inclusion of the new resonance data • Detailed comparison with available experimental data • Cross sections for individual channels • Differential cross sections (angular, energy, energy-angular distributions) • Cross check of the evaluated data within the covariances calculations • Particle transport calculations for comparison with integral experimental data and feedback for the evaluated data 23-26 March 2010, IAEA, Vienna

  5. Total and elastic scattering cross sections 23-26 March 2010, IAEA, Vienna

  6. Results of the evaluation for 50Cr (partial cross sections) 23-26 March 2010, IAEA, Vienna

  7. Results of the evaluation for 52Cr (partial cross sections) 23-26 March 2010, IAEA, Vienna

  8. Results of the evaluation for 53Cr(partial cross sections) 23-26 March 2010, IAEA, Vienna

  9. Results of the evaluation for 54Cr (partial cross sections) 23-26 March 2010, IAEA, Vienna

  10. Gas production data(protons) 23-26 March 2010, IAEA, Vienna

  11. Gas production data (alphas) 23-26 March 2010, IAEA, Vienna

  12. Particle emission spectra (neutrons) 23-26 March 2010, IAEA, Vienna

  13. Particle emission spectra (photons) 23-26 March 2010, IAEA, Vienna

  14. Charged particle emission spectra(alphas) 23-26 March 2010, IAEA, Vienna

  15. MF1 MF2 MF3 MF4 MF6 MF8 MF33 MF12 MF14 MF40 Evaluated data file content (promising) MT=451, general information MT=151, resonance parameters MT= 1, 2, 5, 51-70, 102 MT= 2, 51-70 MT= 5 (n, p, d, t, h, , recoils,  - spectra), 102 MT= 5 MF10 MT= 5 (subsections for each recoil) MT= 51-70 MT= 51-70 MT= 1, 2, 51-70, 102 MT= 5 (subsections for each recoil) 23-26 March 2010, IAEA, Vienna

  16. MF1 MF2 MF3 MF4 MF6 MF8 MF14 MF33 MF12 Evaluated data file content (conventional) MT=451, general information MT=151, resonance parameters MT= 1,2,4,5,16,17,22,28,5,51-70,102,103,104,105,106,107 MT= 2, 51-70 MT= 1,2,4,5,16,17,22,28,5,51-70,102,103,104,105,106,107 MT= … MF10 MT= … MT= 51-70 MT= 51-70 MT= 1,2,4,5,16,17,22,28,5,51-70,102,103,104,105,106,107 23-26 March 2010, IAEA, Vienna

  17. OKTAVIAN benchmark: neutron leakage spectra 23-26 March 2010, IAEA, Vienna

  18. OKTAVIAN benchmark: neutron flux integrals 23-26 March 2010, IAEA, Vienna

  19. Conclusions • The neutron transport files are available for all stable Cr isotopes for neutron energies up to 200 MeV • GDH model for the preequilibrium reactions was included as an option in TALYS code • The set of the optimal models paramers and nuclear models for TALYS calculations was obtained for Cr-50,53,54 isotopes • Very good description of the avalable experimental data was achieved • The calculations of the covariances are being finalized. • The newly evaluated resonance parameters will be supplied by L. Leal • The ENDF-6 files are expected to be prepared by the end of April 2010 • The benchmark calculations were done 23-26 March 2010, IAEA, Vienna

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