Alpha irradiation effects in Ca2Nd8(SiO4)6O2
Creators
- 1. Boeing Co., Seattle, WA (USA)
- 2. Pacific Northwest Lab., Richland, WA (USA)
Description
The effects of alpha irradiation in the rare-earth silicate, Ca2Nd8(SiO4)6O2, was investigated by x-ray diffraction, x-ray absorption near-edge spectroscopy (XANES), and extended x-ray fine structure (EXAFS) techniques. Irradiation with alpha particles emitted isotropically from a 238PuO2 source to a cumulative dose of 2.25 times 1021 alphas/m2 (0.36 dpa) produced measurable anisotropic lattice expansions, with no tendency toward the amorphization that was previously reported due to self-radiation damage in Cm-doped samples at similar displacement-damage (0.25 dpa) levels. The unit-cell volume expanded exponentially with dose to a value corresponding to 2.5% expansion at saturation. The fluorescence XANES data of irradiated surfaces indicate a rearrangement of the near-neighbor ions about Nd. The EXAFS results indicate an irradiation-induced increase in structural disorder that becomes readily apparent at distances of several coordination spheres away from Nd. 14 refs., 5 figs
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS, PC A03/MF A01 - OSTI as DE89015514; US Govt. Printing Office Dep.
Files
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Additional details
Publishing Information
- Imprint Pagination
- 17 p.
- Report number
- PNL-SA--16864
Conference
- Title
- crystalline oxides and ceramics session.
- Acronym
- Radiation effects in insulators-5
- Dates
- 19-23 Jun 1989.
- Place
- Hamilton (Canada).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 20078916
- Subject category
- S36: MATERIALS SCIENCE; S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ALPHA PARTICLES; CALCIUM OXIDES; DEFECTS; FINE STRUCTURE; IRRADIATION; NEODYMIUM OXIDES; PARTICLE SIZE; PHYSICAL RADIATION EFFECTS; SAMPLE PREPARATION; SILICON OXIDES; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHALCOGENIDES; CHARGED PARTICLES; COHERENT SCATTERING; DIFFRACTION; HELIUM IONS; IONIZING RADIATIONS; IONS; NEODYMIUM COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; RADIATION EFFECTS; RADIATIONS; RARE EARTH COMPOUNDS; SCATTERING; SILICON COMPOUNDS; SIZE
Optional Information
- Contract/Grant/Project number
- Contract DOE AC06-76RL01830
- Secondary number(s)
- CONF-8906155--2.