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An EPR study of γ- and α-irradiated synthetic powdered calcite labelled with 13C

1991; Pergamon Press; Volume: 18; Issue: 1-2 Linguagem: Inglês

10.1016/1359-0189(91)90113-v

1878-1691

R. Debuyst, Mawete Bidiamambu, Fernand Dejehet,

Nuclear Physics and Applications

Samples of 13C enriched (99%) calcite were exposed to γ ray and α particle irradiations. Due to their g and hyperfine coupling values, the EPR signals could be attributed to four CO-2 radicals located in different environments, two CO-3 radicals and two non-carbon centred species (at g = 2.0052 and 2.0036). The isotropic dating signal at g = 2.0007 is attributed to a rapidly tumbling CO-2 radical. An axial CO-2 radical is selectively produced by α particles.