Decay of the pulsed thermal neutron flux in two-zone hydrogenous systems – Monte Carlo simulations using MCNP standard data libraries
| Autor: | Ewa Krynicka, Urszula Wiącek |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
Nuclear and High Energy Physics Neutron transport Scattering Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Monte Carlo method Neutron scattering Small-angle neutron scattering Neutron temperature Nuclear physics Neutron cross section Neutron Nuclear Experiment Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 243:92-98 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2005.07.213 |
| Popis: | Pulsed neutron experiments in two-zone spherical and cylindrical geometry has been simulated using the MCNP code. The systems are built of hydrogenous materials. The inner zone is filled with aqueous solutions of absorbers (H3BO3 or KCl). It is surrounded by the outer zone built of Plexiglas. The system is irradiated with the pulsed thermal neutron flux and the thermal neutron decay in time is observed. Standard data libraries of the thermal neutron scattering cross-sections of hydrogen in hydrogenous substances have been used to simulate the neutron transport. The time decay constant of the fundamental mode of the thermal neutron flux determined in each simulation has been compared with the corresponding result of the real pulsed neutron experiment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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