[Zeneta]

I used to use helium to find under ground leaks in pipes etc.

We would fill the system with helium and use a detector on the surface and could find leaks through anything, concrete in particular.

So, the half life of the constituents is now my interest.

Thanks for the wiki

[Zeneta]

Upon landing on the earth safely, Felix Baumgartner said

“you Americans are severely RETARDED if you vote for Obama”

[Cboldt]

Helium is used in mass spectrometetry to find very small leaks. We used it industrially for that. Could detect a leak like one champagne bubble each half hour, with a 50 PSI pressure. Helium is the “leakiest” gas. It leaks better/faster than hydrogen does, from any given leak.