View in EDS

Novel production method for traceable surface sources by aluminium functionalisation

Saved in:
Bibliographic Details
Title: Novel production method for traceable surface sources by aluminium functionalisation
Authors: Tuzun, Dilan, Lourenço, V., Chambon, Lucille, Kergadallan, Yann
Contributors: Laboratoire National Henri Becquerel (CEA, LIST) (LNHB (CEA, LIST)), Département Métrologie Instrumentation & Information (CEA, LIST) (DM2I (CEA, LIST)), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay
Source: ICRM 2023 - 23rd International Conference on Radionuclide Metrology and its Applications ; https://cea.hal.science/cea-04272758 ; ICRM 2023 - 23rd International Conference on Radionuclide Metrology and its Applications, Mar 2023, Bucarest, Romania
Publisher Information: CCSD
Publication Year: 2023
Subject Terms: aluminium substrate, binding, radioactivity, ionizing radiation, metrology, Attenuated Total Reflectance-Fourier Transform Infrared spectroscopy (ATR-FTIR), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), actinides, liquid scintillation counting, autoradiography, polymeric source, functionalisation, beta-raysn grafting, alpha-rays, reference source, standard source, calibration, detector, contamination, nuclear instrumentation, instrumentation, [CHIM.RADIO]Chemical Sciences/Radiochemistry
Subject Geographic: Bucarest, Romania
Description: International audience ; During decommissioning, the initial cartography of all surfaces is crucial for identifying potential future waste based on its radiation level. contamination detectors should be calibrated in terms of emission flux or Bq.cm-2 using suitable surface sources. Current standard sources, complying with ISO 8769 (Reference Sources-Calibration of Surface Contamination Monitors ), lack representativeness since they are only made of aluminium and have a limited surface area. This research seeks to produce flexible, traceable surface sources for alpha and beta emitters with low radiation self-absorption. While the existing sources are produced by adsorption on the aluminium surface, we aim to have strong chemical bonds due to the grafting on the surface. A novel functionalisation strategy involving spacer chemicals was developed to provide these sources. We have studied two substrate types: polymeric sources that can be molded into complex shapes and flexible aluminium foils that can be compared to existing ISO 8769 sources. This contribution will focus on aluminium substrate functionalisation . It involved choosing bi-functional compounds that can bind to a radionuclide on one end and be grafted onto aluminium with the free functional group of the compound on the other end. Because the radioactivity is chemically bound to their surfaces, these sources are meant to be non-contaminating and easy to use on-site. Our calibration sources can also be used to assess the detector's performance in front of a curved radioactive surface. Three bi-functional compounds were identified and the three main surface functionalisation steps were optimized. The first step is cleaning, to remove all the residues from the substrates. Then etching proceeded to release hydroxide functions. Next, the etched samples are immersed in the bi-functional compound solution. The influence of the reaction time, temperature, and drying conditions were studied. After the functionalisation, the inactive samples were characterised. ...
Document Type: conference object
Language: English
Availability: https://cea.hal.science/cea-04272758
https://cea.hal.science/cea-04272758v1/document
https://cea.hal.science/cea-04272758v1/file/Presentation%20Dilan%20Tuzun_ICRM_2023.pdf
Rights: info:eu-repo/semantics/OpenAccess
Accession Number: edsbas.8890FEB4
Database: BASE
Description
Abstract:International audience ; During decommissioning, the initial cartography of all surfaces is crucial for identifying potential future waste based on its radiation level. contamination detectors should be calibrated in terms of emission flux or Bq.cm-2 using suitable surface sources. Current standard sources, complying with ISO 8769 (Reference Sources-Calibration of Surface Contamination Monitors ), lack representativeness since they are only made of aluminium and have a limited surface area. This research seeks to produce flexible, traceable surface sources for alpha and beta emitters with low radiation self-absorption. While the existing sources are produced by adsorption on the aluminium surface, we aim to have strong chemical bonds due to the grafting on the surface. A novel functionalisation strategy involving spacer chemicals was developed to provide these sources. We have studied two substrate types: polymeric sources that can be molded into complex shapes and flexible aluminium foils that can be compared to existing ISO 8769 sources. This contribution will focus on aluminium substrate functionalisation . It involved choosing bi-functional compounds that can bind to a radionuclide on one end and be grafted onto aluminium with the free functional group of the compound on the other end. Because the radioactivity is chemically bound to their surfaces, these sources are meant to be non-contaminating and easy to use on-site. Our calibration sources can also be used to assess the detector's performance in front of a curved radioactive surface. Three bi-functional compounds were identified and the three main surface functionalisation steps were optimized. The first step is cleaning, to remove all the residues from the substrates. Then etching proceeded to release hydroxide functions. Next, the etched samples are immersed in the bi-functional compound solution. The influence of the reaction time, temperature, and drying conditions were studied. After the functionalisation, the inactive samples were characterised. ...