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Title: Ion beam analyses of radionuclide migration in heterogeneous rocks

The migration of radionuclides (RN) in the environment is a topic of general interest, for its implications on public health, and it is an issue for the long-term safety studies of deep geological repositories (DGR) for high-level radioactive waste. The role played by colloids on RN migration is also of great concern. Diffusion and sorption are fundamental mechanisms controlling RN migration in rocks and many experimental approaches are applied to determine transport parameters for low sorbing RN in homogeneous rocks. However, it is difficult to obtain relevant data for high sorbing RN or colloids, for which diffusion lengths are extremely short, or within heterogeneous rocks, where transport might be different in different minerals. The ion beam techniques Rutherford Backscattering Spectrometry (RBS) and micro-Particle Induced X-Ray Emission ({mu}PIXE), rarely applied in the field, were selected for their micro-analytical potential to study RN diffusion and surface retention within heterogeneous rocks. Main achievements obtained during last 12 years are highlighted.
Authors:
; ;  [1] ;  [2] ; ;  [3]
  1. CIEMAT, Avda. Complutense 40, Madrid 28040 (Spain)
  2. CIVEN, Via delle Industrie 5, Venezia-Marghera 30175 (Italy)
  3. LNL-INFN, Viale dell' Universita 2, Legnaro-Padova 35020 (Italy)
Publication Date:
OSTI Identifier:
22121675
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1530; Journal Issue: 1; Conference: ION BEAMS '12: International conference on multidisciplinary applications of nuclear physics with ion beams, Legnaro, Padova (Italy), 6-8 Jun 2012; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 61 RADIATION PROTECTION AND DOSIMETRY; DIFFUSION LENGTH; ENVIRONMENT; HIGH-LEVEL RADIOACTIVE WASTES; ION BEAMS; ION MICROPROBE ANALYSIS; MINERALS; PIXE ANALYSIS; PUBLIC HEALTH; RADIONUCLIDE MIGRATION; ROCKS; RUTHERFORD BACKSCATTERING SPECTROSCOPY; SAFETY ANALYSIS; SORPTION; UNDERGROUND DISPOSAL