Depth profiles of damage accumulation in UO2 and (U, Gd)O2 pellets irradiated with 100 MeV iodine ions

K. Nogita, K. Hayashi, K. Une, K. Fukuda

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

To study the initial defect formation and accumulation process during fission events, sliced pellet specimens of UO2 and (U, Gd)O2 were irradiated at ambient temperatures below 200°C, with 100 MeV iodine ions over a fluence range of 1.0 × 1018 - 2.0 × 1019 ions/m2. The surface of the specimens was analyzed by scanning electron microscopy (SEM) and X-ray diffractometry (XRD), and then the depth profiles of incident iodine ions and defect clusters were measured by secondary ion mass spectrometry (SIMS) and transmission electron microscopy (TEM), respectively. Lattice parameter change, which is associated with point defect accumulation, increased with ion fluence. Defect clusters of dislocations and dislocation loops were recognized, and their depth profiles were in good agreement with the calculated damage profile. These profiles of iodine ions and dislocation loops in both UO2 and (U, Gd)O2 were discussed in terms of inelastic and elastic collisions.

Original languageEnglish
Pages (from-to)302-309
Number of pages8
JournalJournal of Nuclear Materials
Volume273
Issue number3
DOIs
Publication statusPublished - Aug 1 1999

Fingerprint

Iodine
pellets
iodine
Ions
damage
profiles
ions
Defects
defects
fluence
inelastic collisions
Point defects
Secondary ion mass spectrometry
point defects
X ray diffraction analysis
secondary ion mass spectrometry
ambient temperature
Lattice constants
fission
lattice parameters

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Cite this

Depth profiles of damage accumulation in UO2 and (U, Gd)O2 pellets irradiated with 100 MeV iodine ions. / Nogita, K.; Hayashi, K.; Une, K.; Fukuda, K.

In: Journal of Nuclear Materials, Vol. 273, No. 3, 01.08.1999, p. 302-309.

Research output: Contribution to journalArticle

Nogita, K. ; Hayashi, K. ; Une, K. ; Fukuda, K. / Depth profiles of damage accumulation in UO2 and (U, Gd)O2 pellets irradiated with 100 MeV iodine ions. In: Journal of Nuclear Materials. 1999 ; Vol. 273, No. 3. pp. 302-309.
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