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Title: Characterization of ion-induced radiation effects in nuclear materials using synchrotron x-ray techniques

Recent efforts to characterize the nanoscale structural and chemical modifications induced by energetic ion irradiation in nuclear materials have greatly benefited from the application of synchrotron-based x-ray diffraction (XRD) and x-ray absorption spectroscopy (XAS) techniques. Key to the study of actinide-bearing materials has been the use of small sample volumes, which are particularly advantageous, as the small quantities minimize the level of radiation exposure at the ion-beam and synchrotron user facility. This approach utilizes energetic heavy ions (energy range: 100 MeV–3 GeV) that pass completely through the sample thickness and deposit an almost constant energy per unit length along their trajectory. High energy x-rays (25–65 keV) from intense synchrotron light sources are then used in transmission geometry to analyze ion-induced structural and chemical modifications throughout the ion tracks. We describe in detail the experimental approach for utilizing synchrotron radiation (SR) to study the radiation response of a range of nuclear materials (e.g., ThO 2 and Gd 2Ti xZr 2–xO 7). Also addressed is the use of high-pressure techniques, such as the heatable diamond anvil cell, as a new means to expose irradiated materials to well-controlled high-temperature (up to 1000 °C) and/or high-pressure (up to 50 GPa) conditions. Furthermore, this ismore » particularly useful for characterizing the annealing kinetics of irradiation-induced material modifications.« less
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Michigan, Ann Arbor, MI (United States)
  3. GSI Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany)
  4. GSI Helmholtz Centre for Heavy Ion Research, Darmstadt (Germany); Technische Univ. Darmstadt, Darmstadt (Germany)
  5. Carnegie Institution of Washington, Argonne, IL (United States)
  6. Univ. of Chicago, Chicago, IL (United States)
  7. Joint Institute for Nuclear Research, Dubna (Russia)
  8. Stanford Univ., Stanford, CA (United States)
Publication Date:
Grant/Contract Number:
NA0002006
Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
Journal Volume: 30; Journal Issue: 09; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Research Org:
Carnegie Institution of Washington, Argonne, IL (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; synchrotron radiation; X-ray diffraction; X-ray absorption spectroscopy; nuclear materials; actinide oxides; defects; amorphization; crystalline-crystalline transformations; defect annealing; high-pressure
OSTI Identifier:
1335157