Portal:Radiation astronomy/Resource/2
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This gamma-ray spectrum contains the typical isotopes of the uranium-radium decay line. Credit: Wusel007.{{free media}} 
Colors[edit | edit source]
The peak at 40 keV is not from the mineral. From the color of the rock shown the yellowish mineral is likely to be autunite.
Autunite occurs as an oxidizing product of uranium minerals in granite pegmatites and hydrothermal deposits.