Detailed MCNP simulations of gamma-ray spectroscopy measurements with calibration blocks for uranium mining applications
| Autor: | Jean-Luc Ma, P. G. Allinei, Bertrand Perot, P. Chaussonnet, T. Marchais, H. Toubon, Cedric Carasco |
|---|---|
| Přispěvatelé: | CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), amplexor, amplexor, Groupe AREVA |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th]
Nuclear and High Energy Physics Nuclear measurements Materials science [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] Astrophysics::High Energy Astrophysical Phenomena Nuclear engineering uranium mining chemistry.chemical_element Radiation [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 01 natural sciences germanium detector Index Terms-Nuclear measurements 0103 physical sciences Calibration Gamma spectroscopy [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Electrical and Electronic Engineering 010306 general physics Spectroscopy 010308 nuclear & particles physics Detector Gamma ray Nuclear data Uranium Nuclear Energy and Engineering chemistry gamma-ray spectroscopy MCNP6 |
| Zdroj: | ANIMMA 2017 ANIMMA 2017, Jun 2017, Liege, Belgium IEEE Transactions on Nuclear Science IEEE Transactions on Nuclear Science, 2018, 65 (9), pp.2533-2538. ⟨10.1109/TNS.2018.2797312⟩ |
| ISSN: | 0018-9499 |
| Popis: | International audience; AREVA Mines and the Nuclear Measurement Laboratory of CEA Cadarache are collaborating to improve the sensitivity and precision of uranium concentration evaluation by means of gamma-ray measurements. This paper reports gamma-ray spectra, recorded with two high-purity germanium detectors, on standard cement blocks with increasing uranium content, and the corresponding MCNP simulations. The detailed MCNP model of detectors and experimental setup has been validated by calculation vs. experiment comparisons. An optimization of detector MCNP models is presented in this paper, as well as a comparison of different nuclear data libraries to explain missing or exceeding peaks in the simulation. Energy shifts observed between the fluorescence X-rays produced by MCNP and atomic data are also investigated, as well as gamma backscattering and beta radiation effects. The validated numerical models will be used in further studies to develop new gamma-ray spectroscopy approaches aiming at reducing acquisition times, especially for ore samples with low uranium content. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|