Radionuclide	Half-Life	Time to 10 Half-Lives
Xe-133	5.24 days	52.4 days
In-111	2.83 days	28.3 days
Sr-89	50.5 days	505 days (1.4 years)
Co-57	272 days	2720 days (7.5 years)
Cr-51	27.7 days	277 days (9 months)
Mo-99	65.9 hours	659 hours (27.5 days)
Tc-99m	6.1 hours	61 hours (2.5 days)
Tl-201	73.1 hours	731 hours (30.5 days)
Ga-67	78.3 hours	783 hours (32.6 days)
I-123	13.2 hours	132 hours (5.5 days)
I-131	8.04 days	80.4 days (2.7 months)
Sm-153	46.3 hours	463 hours (19.3 days)
I-125	60 days	600 days (1.6 years)
Pd-103	17 days	170 days (5.7 months)
Y-90	64.1 hours	641 hours (27 days)
P-32	14.28 days	142.8 days (4.8 months)