Published December 1977
| Version v1
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Radiation damage in calcium sulfate
Description
We used the techniques of Electron Paramagnetic Resonance (EPR) to study the free radicals produced by X-radiation in natural crystals of Gypsum (CaSO42H20). We observed the formation of four free radicals. The spectra of these radicals are overlapped, being separated by power and temperature variation measurements. Two radicals were univocal identified, as being of OH+ and 02H+. We suggest the assignment of SO4- and O2- to two other radicals. From angular variation measurements, we determined the components of tensors ↔g and ↔A of the radicals OH- and O2H-. (author)
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Additional details
Additional titles
- Original title (Portuguese)
- Danos de radiacao em sulfato de calcio
Publishing Information
- Imprint Pagination
- 129 p.
- Report number
- INIS-BR--5620
INIS
- Country of Publication
- Brazil
- Country of Input or Organization
- Brazil
- INIS RN
- 40084755
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- BRAGG REFLECTION; CALCIUM SULFATES; CRYSTALLOGRAPHY; ELECTRON SPIN RESONANCE; GYPSUM; HYDROGEN; HYDROXYL RADICALS; RADICALS; STRUCTURAL CHEMICAL ANALYSIS; X RADIATION; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; COHERENT SCATTERING; DIFFRACTION; ELECTROMAGNETIC RADIATION; ELEMENTS; IONIZING RADIATIONS; MAGNETIC RESONANCE; MINERALS; NONMETALS; OXYGEN COMPOUNDS; RADIATIONS; RADICALS; REFLECTION; RESONANCE; SCATTERING; SULFATE MINERALS; SULFATES; SULFUR COMPOUNDS
Optional Information
- Notes
- 36 refs., 12 figs., 5 tabs.