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Monte-Carlo simulations : FLUKA vs. MCNPX

4th International Summer School « Nuclear Physics Methods and Accelerators in Biology and Medicine ». Monte-Carlo simulations : FLUKA vs. MCNPX. Maxime ODEN – École des Mines de Nantes (France) Spectroscopy dpt., Nuclear Physics Institute of ASCR

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Monte-Carlo simulations : FLUKA vs. MCNPX

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  1. 4th International Summer School« Nuclear Physics Methods and Accelerators in Biology and Medicine » Monte-Carlo simulations : FLUKA vs. MCNPX Maxime ODEN – École des Mines de Nantes (France) Spectroscopy dpt., Nuclear Physics Institute of ASCR Antonín Krása, Mitja Majerle, Ondřej Svoboda, Vladimír Wagner for the Energy plus Transmutation collaboration

  2. Introduction • Experiments are carried out at JINR to study spallation p + Pb => spallation reaction • Detection of neutron with to activation detectors (Au, Al, Bi). • Activation foils activities are measured thanks to a germanium detector. Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR

  3. Phasotron experiment - bare Pb target Lead target Beam : proton 660 MeV

  4. Energy plus Transmutation Set-up • target: Pb (28.66 kg) • blanket: U (206.4 kg) • shielding: Cd + (CH2)n Beam : proton 0.7/1/ 1.5/2 GeV deuteron 1.6 / 2.52 GeV Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR

  5. Energy plus Transmutation Set-up

  6. MCNPX Simulation • The obtained experimental data are used to check prediction from MCNPX (a computer simulation code based on Monte Carlo method) • MCNPX can calculate neutrons fluence where the detectors are set up • Neutron fluence multiplied by cross-sections for activation reaction give simulated activation results • Results compared to experimental results show discrepancies at higher energies (1.5 GeV and 2 GeV)

  7. MCNPX Simulation • Ratio between experiment and MCNPX simulation results :

  8. FLUKA Simulation • Verify experiments with FLUKA code: • Spectrum in phasotron experiment • Reaction rate in radial detectors • Two ways to calculate activation results: • Multiplication with cross-sections • RESNUCLEi function

  9. FLUKA Simulation • neutrons fluence • Phasotron experiment with proton beam (660MeV) MCNPX FLUKA

  10. FLUKA Simulation Energy plus Transmutation Side view Front view Radial detectors (gold foils)

  11. FLUKA Simulation • Ratio between experiment and FLUKA simulation results (manual mutliplication): ratio Radial distance (cm)

  12. FLUKA Simulation II • Ratio between experiment and FLUKA simulation results with RESNUCLEi scoring card: ratio Radial distance (cm)

  13. Conclusion • FLUKA results checked by comparison with MNCPX • FLUKA and MCNPX are expected to give similar results Thank you for your attention Maxime ODEN - École des Mines de Nantes - Nuclear Physics Institute of ASCR

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