What is the radiation output of Ni59?

Question

How many R/hr @ 1' ,or whatever units you know. Is it regulated by the NRC ,or is the output too low?

Answer 1

59Ni has a half life of 76,000 years.
Ni58.934349 + e → Co58.9331976 + γ
∆mc^2 = (0.0011514 u)(931.494028(23) MeV = 1.072522 MeV
197.3270 eV nm /1.072522 MeV = 0.18398 pm

M = M0(1/2)^t/76000
M = M0e^-(1.040424*10^-9)t
dM/dt = -(1.040424*10^-9)M0e^-(1.040424*10^-9)t
For 1 microgram
dM/dt = 166,675,940 decays per hour

A microgram, though would seem to be a very large amount of this isotope.