Axial Co2- in Alpha-particle Irradiated Calcite - Potential Use in Esr Dating
(1990) Nuclear Tracks and Radiation Measurements — Vol. 17, n° 4, p. 525-530 (1990)
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- Abstract
- At room temperature, two paramagnetic centres attributed to two kinds of CO2- radical-ions, an axial one and an orthorhombic one, are observed in a Po210 (alpha-emitter)-doped synthetic calcite. A subsequent gamma-ray irradiation of a few kGy does not affect the intensity of the axial species, whereas it increase the orthorhombic one. A single gamma-ray irradiation up to approximately 10 kGy of non-doped synthetic calcite only produces the orthorhombic centre. Consequently, dating might be possible using the axial CO2- signal (if stable enough), which is sometimes visible in natural calcite. Therefore, "accumulated doses" should be obtained by means of alpha-particle bombardments, and the annual dose merely estimated from the U-Th content of the sample itself.
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Debuyst, R., Decanniere, P., & Dejehet, F. (1990). Axial Co2- in Alpha-particle Irradiated Calcite - Potential Use in Esr Dating. Nuclear Tracks and Radiation Measurements, 17(4), 525-530. https://hdl.handle.net/2078.5/82438 (Original work published 1990)