Good luck with it, Brad:
Just watch that shaft! You'll be unstable for a while:
radon-222, with a half-life of 3.825 days, emits an alpha particle to become polonium-218.
polonium-218, with a half-life of 3.05 minutes, emits an alpha particle to become lead-214.
lead-214, with a half-life of 26.8 minutes, emits a beta particle and a gamma ray to become bismuth-214.
bismuth-214, with a half-life of 19.7 minutes, emits either an alpha particle or a beta particle and a gamma ray to become either thallium-210 or polonium-214.
polonium-214, with a half-life of a 150 microseconds, emits an alpha particle to become thallium-210.
thallium-210, with a half-life of 1.32 minutes, emits a beta particle to become lead-210.
lead-210, with a half-life of 22 years, emits a beta particle and a gamma ray to become bismuth-210.
bismuth-210, with a half-life of five days, emits a beta particle to become polonium-210.
polonium-210, with a half-life of 138 days, emits an alpha particle and a gamma ray to become lead-206.
lead-206 is a stable isotope of lead.
I can never remember these transition/transmutational decay phases...
Health,
John
