I posted;

 >So based on the intensity of the halo we can understand the events
which produced it.

Each step of the decay sequence leaves a destinct halo.

It's a spherical phenomena?


And Wesley Bruce and Robin van Spaandonk replied;

 >>It's like a mass spectrometer read out, each peak, halo, is a
trasition in the decay sequence.  I just remembered who's got my
copy of Gentries book, Dad borrowed it, so I'll see if I can  get it
back and check it for you.

Because each different isotope produces decay particles with a
different energy, those with the greatest energy will have the
greatest radius. Those with less energy will have a smaller
radius. This leads to a series of concentric shells.

Thank you for your reply Robin. However I'm still wondering about extracting information from the imprint of the energy on the rock. Any suggestions about what areas I should read about?


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