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[en] Under the CRP D1.50.19 focusing on the optimization of remediation of radioactive contaminated agricultural land, one important objective is to update the existing decision support system DSS4NAFA to support data management during remediation activities in the aftermath of a nuclear emergency affecting food and agriculture. During remediation, the need exists for keeping an overview of the remediation activities and, in particular, where, when and how these activities are carried out. Further, it is imperative to keep track of the efficiency and effectiveness of remediation activities (e.g. reduction of soil and food contamination). At this moment the workflow for the remediation module is being developed in close collaboration with the CRP D1.50.19 research partners from across the world for addressing the above-mentioned needs for enhanced data management during remediation.
[en] This study explored the zinc-boro-vanadate (ZBV) glass reinforced with AgO to show radiation shielding competencies. A glass system with composition 20ZnO-55BO-(25-x)VO-xAgO, where x ranges from 0 to 10 with the steps of 2.5 mol%, was designed. Some physical and optical calculations were employed to figure out glass density (ρ), molar volume (V), oxygen molar volume (OMV), oxygen packing density (OPD), refractive index (n), dielectric constant (ϵ), and metalization criterion (M) for the glass system of ZBV0 to ZBV10. According to the findings, one can specify that the increasing content of AgO enhanced both the physical and optical features of the ZBV series. The glass density was increased from 3.3150 to 3.6930 g/cm, while the refractive index was raised from 3.0693 to 3.1216 with the insertion ratio of AgO from 0 to 10 mol%. The ZBV10 sample having the maximum AgO of 10 mol% ensured to improve physical and optical properties. The shielding properties of the examined glass samples were investigated to evaluate their ability for radiation protection purposes. The Monte Carlo N-Particle Transport Code 5 (MCNP-5) was utilized to assess the projected gamma photons' average track length on the investigated glass samples. Then, the linear attenuation coefficient (LAC), half-value layer (HVL), transmission factor (TF), and radiation protection efficiency (RPE) were calculated based on the simulated gamma photons' average track length. The obtained results showed that the highest LAC values increased from 71.999 to 91.979 cm. Moreover, the thicker HVL decreased from 9.869 to 9.332 cm, increasing the AgO insertion ratio between 0 and 10 mol%, respectively. The mentioned data confirmed that substitution of the VO by the AgO enhance the gamma-ray shielding capacity of the explored series of glass.
[en] The synthesis of CdTe nanocrystals (NCs) is performed by electrochemical deposition into prepared ion tracks in a a-SiOO/Si-n template. As a result, CdTe NCs are obtained in a wurtzite (WZ) crystal phase. The measurement of the current-voltage characteristics shows that the CdTe (WZ NC)/SiOO/Si system obtained in this way has n-type conductivity. Computer simulations using the CRYSTAL computer code show good agreement between experimental and calculated lattice parameters. The theoretical calculations also show that the crystal has a direct bandgap at the Γ point of the Brillouin zone. (© 2020 Wiley‐VCH GmbH)