On Some Paramagnetic Species Induced in Natural Calcities By <math>β</math> and <math>γ</math>-Ray Irradiations

Nota de FísicaPublicado

On Some Paramagnetic Species Induced in Natural Calcities By $<math>\beta</math>$ and $<math>\gamma</math>$ -Ray Irradiations

Rossi, A.M.; G. Poupeau; J. Danon

1985

Autores: Rossi, A.M.; G. Poupeau; J. Danon
Tipo: Nota de Física
Status: Publicado
Data de publicação: 1985
Descrição: We studied the ESR absorption lines of calcite speleothems both as monocrystals and powders, after energetic <math>\beta\,\!</math>-rays or <math>\gamma\,\!</math>-rays irradiation. Both kinds of irradiation produce same lines. Angular variation studies of monocrystals revealed four induced paramagnetic species stable at room temperature. Three of these were attributed to <math>CO_3^{---}\,\!</math> group, <math>CO_2^{-}\,\!</math> groups with axial and orthorhombic symetry and a fourth one could be due to the <math>C0_3^{-}</math> group. Powder spectra show that these lines, are activated by irradiation in all speleothe we studied and can be present either in natural ESR spectra. Their relationships to the lines usually considered for RSR dating is discussed.
Ano: 1985
Número: CBPF-NF-080/85
Vínculo com tese: Não
Vínculo com bolsa: Não