Abstract
We used the techniques of Electron Paramagnetic Resonance (EPR) to study the free radicals produced by X-radiation in natural crystals of Gypsum (CaSO{sub 4}2H{sub 2}0). 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{sup +} and 0{sub 2}H{sup +}. We suggest the assignment of SO{sub 4}{sup -} and O{sub 2}{sup -} to two other radicals. From angular variation measurements, we determined the components of tensors {r_reversible}g and {r_reversible}A of the radicals OH{sup -} and O{sub 2}H{sup -}. (author)
Citation Formats
Albuquerque, Antonio Roberto Pereira Leite.
Radiation damage in calcium sulfate; Danos de radiacao em sulfato de calcio.
Brazil: N. p.,
1977.
Web.
Albuquerque, Antonio Roberto Pereira Leite.
Radiation damage in calcium sulfate; Danos de radiacao em sulfato de calcio.
Brazil.
Albuquerque, Antonio Roberto Pereira Leite.
1977.
"Radiation damage in calcium sulfate; Danos de radiacao em sulfato de calcio."
Brazil.
@misc{etde_21216056,
title = {Radiation damage in calcium sulfate; Danos de radiacao em sulfato de calcio}
author = {Albuquerque, Antonio Roberto Pereira Leite}
abstractNote = {We used the techniques of Electron Paramagnetic Resonance (EPR) to study the free radicals produced by X-radiation in natural crystals of Gypsum (CaSO{sub 4}2H{sub 2}0). 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{sup +} and 0{sub 2}H{sup +}. We suggest the assignment of SO{sub 4}{sup -} and O{sub 2}{sup -} to two other radicals. From angular variation measurements, we determined the components of tensors {r_reversible}g and {r_reversible}A of the radicals OH{sup -} and O{sub 2}H{sup -}. (author)}
place = {Brazil}
year = {1977}
month = {Dec}
}
title = {Radiation damage in calcium sulfate; Danos de radiacao em sulfato de calcio}
author = {Albuquerque, Antonio Roberto Pereira Leite}
abstractNote = {We used the techniques of Electron Paramagnetic Resonance (EPR) to study the free radicals produced by X-radiation in natural crystals of Gypsum (CaSO{sub 4}2H{sub 2}0). 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{sup +} and 0{sub 2}H{sup +}. We suggest the assignment of SO{sub 4}{sup -} and O{sub 2}{sup -} to two other radicals. From angular variation measurements, we determined the components of tensors {r_reversible}g and {r_reversible}A of the radicals OH{sup -} and O{sub 2}H{sup -}. (author)}
place = {Brazil}
year = {1977}
month = {Dec}
}