Astromat

This dataset includes numbers of atoms of 132Xe and isotope ratios of the other xenon isotopes to 132Xe for gas extracted from Irradiation Tube 4 after artificial neutron irradiation (irradiation MN2025a). This tube contained samples OREX-803230-100, OREX-803230-101 and OREX-803230-102 (total mass ~0.6 mg), which are individual particles separated from sample OREX-803230-0. A UV laser was used to drill a hole through the tube and release gas trapped inside the tube after irradiation. Xenon released from the tube was admitted into the RELAX (Refrigerator Enhanced Laser Analyser for Xenon) time-of-flight, resonance ionization mass spectrometer at the University of Manchester for xenon isotopic analysis. The purpose of this dataset is to investigate whether any iodine is lost from the samples during irradiation, prior to investigating the I-Xe system in the particles themselves. A blank tube, Tube 1, containing just empty foil parcels, was also irradiated and gas trapped inside was analysed to allow a correction for iodine contamination associated with the foil. Aliquots of Shallowater enstatite were irradiated and analysed alongside the samples, to monitor the conversion of 127I to 128Xe; those data are also incorporated in this dataset. A large volume of atmospheric xenon was released from this tube, and the 128Xe/132Xe ratio was within error of atmospheric xenon. We estimate an upper limit for the possible excess 128Xe analysed in Tube 4 of <0.72 ng iodine (after blank correction). This can be combined with future I-Xe analyses of the individual particles to calculate their iodine concentrations.