Thanks for responding.
I'd like to comment on two things, one from here and the other from the forum you pointed me toward:
1) (here): Note that when each radon atom decays and sticks (assuming it does) and then goes through the Po decays to 206Pb, it leaves a physical object of some size behind (a lead atom) that wasn't there before. Thereby, gradually over time, the crack or conduit *narrows* at that location, altering the probabilities for subsequent radon atoms to get past the ever-narrowing location. This should cause some strings and drifts of haloes to show strange distributions of different-density haloes (which is what I observe in the mica).
2) (there; the 238U earth-age discussion) : You immediately (I'm starting reading at the thread beginning) mention the type of damage done to the mica by the alpha particles, and I see you note high resolution transmission electron microscope studies have been done on some haloes in some mica. This I think (I mention it in passing, in my paper) leads to the idea that one could *unambiguously* differentiate a "polonium" halo (if any exist) from a radon halo:
Given a pie-wedge shaped section, its point centered on the radiocenter, each ring section in the pie wedge *must* have the same number of damage locations in it, IFF it is a "polonium" halo, but the *radon* halo must have twice as many damage locations in the innermost ring, as are in either of the other two, the outer, rings.
If these damage locations can be imaged, to the extent of actually being able to count them more or less accurately, then identification of a radon halo as opposed to a "polonium" halo, becomes trivial.
It is a pleasure to read in these forums. I'll probably continue to check in from time to time, and it is definitely a pleasure to read *you*, showing so much detailed understanding and interest.
Please keep on keepin' on.
Sincerely,
John Brawley