I'm genuinely interested.

Of course :
- (Bones' voice) I'm a doctor, Jim ! Not an atomic physicist !
- I was over-exagerating it a bit for the sake of humour.

BUT !...


From what I've learned from radio-protection lessons is that beta radiation (basically: electrons) while being less energetic than alpha (basically: helium nucleus),
do still require a few milimeters of shielding.

(Hence my conception of lithium battery being exposed).

So the idea that you can shield it inside a powder is intriguing.