Radiation Effects in 129I129Xe Dating of Bjurböle Chondrules by Neutron Irradiation
By irradiating a sample of Bjurböle chondrules in a "hard" neutron flux, 126Xe is produced from 127I via the (n, 2nβ) reaction and 128Xe is produced from 127I via the (n, γβ) reaction. Stepwise heating of the irradiated sample shows that the IXe record depends on which xenon isotope, 126Xe or 128Xe, is chosen as the iodine monitor. The pile-produced 126Xe is preferentially released over pile-produced 128Xe by the low extraction temperatures. This behavior shows radiation effects may play a major role in generating the low-temperature correlation of pile-produced 128Xe with radiogenic 129Xe, which has been previously attributed to the IXe record of slow cooling.
B. Srinivasan et al., "Radiation Effects in 129I129Xe Dating of Bjurböle Chondrules by Neutron Irradiation," Icarus, vol. 16, pp. 571-576, Academic Press Inc., Jun 1972.
The definitive version is available at https://doi.org/10.1016/0019-1035(72)90104-2
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