81Kr in meteorites and81Kr radiation ages
作者： O. Eugster , P. Eberhardt , J. Geiss
DOI: 10.1016/0012-821X(67)90103-3
关键词: Electromagnetic shielding 、 Geology 、 Isotope 、 Radiochemistry 、 Spallation 、 Meteorite 、 Mineralogy 、 Isotopic composition 、 Chemical composition 、 Radiation 、 Krypton
摘要: Abstract The 2.13 × 10 5 y 81 Kr was determined mass-spectrometrically in gram-sized samples of five stone meteorites. following concentrations were found (in units −15 cm 3 STP/g): Stannern: 205 ± 20; Khor Temiki: 3; Mocs: 31 7; Ochansk: 19 6; Parnallee: 27 4. From the measured isotopic composition krypton 78 Kr/ Kr) spall ratios and radiation ages derived. No assumptions on shielding chemical have to be made are therefore inherently more accurate than obtained from stable spallation isotopes alone.
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