Photostimulated luminescence applicable to pre-screening of potassium-rich phases in chondritic breccias

Tatsunori Yokoyama, Keiji Misawa, Osamu Okano, Haruka Minowa, Takaaki Fukuoka

Journal of Radioanalytical and Nuclear Chemistry
pp 1-9
First online: 10 May 2016

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“The identification of alkali-rich components in extraterrestrial materials along with their separation from other constituents is indispensable for subsequent cosmochemical and isotopic studies. This paper presents a simple pre-screening method for such materials by autoradiography using imaging plates (IPs), which is applicable to identification of mm-sized samples containing ca. 30 µg of potassium in the Yamato-74442 chondrite. The detection limit of IPs was ~1 mBq of 40K under 49 days exposure. The method provides an opportunity to screen meteorite materials non-destructively and to inexpensively check potassium-rich areas and are suitable for the 40K–40Ca and 40K–40Ar (39Ar–40Ar) age determinations.”