title: Iodine-129 in terrestrial ores.
abstract: Xenon extracted from natural iodyrite (silver iodide) from Broken Hill, New South Wales, Australia, contains excess xenon-129 from the in situ decay of naturally occurring iodine-129 and excess xenon-128 from neutron capture on iodine-127. On the basis of the amount of radiogenic xenon-129, it is estimated that, prior to the nuclear age, terrestrial iodine contained an equilibrium ratio of iodine-129 to iodine-127 of between 3.3 x 10(-15) and 2.2 x 10(-15).
authors.forename: B
authors.initials: B
authors.lastname: Srinivasan
authors.forename: E C
authors.initials: EC
authors.lastname: Alexander
authors.forename: O K
authors.initials: OK
authors.lastname: Manuel