[stboz]

Beta decay is a lot more manageable from a personal-use standpoint, since a thin shield of lead or other dense material would be more than enough to keep any radiation escape to virtually nil.

What about bremstralung? High Z materials might not be the best thing.

[muawiyah]

In this process bremstralung radiation might well result in COOLING.

I think that eliminates the freon threat as well