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Several points arise. First off, a Co60 therapy source won't provide much beta radiation. The Co60 - Ni60beta decay releases electrons of about 300 keV energy, nearly all of which will be absorbed in the rest of the source and capsule. Pretty much all that comes out will be bremsstrahlung and gamma radiation. If you want to generate useful charge from a radioactive source you would do better with a thin, flat sample of something like Sr90.Second, 400 TBq is a lot more active than any normal teletherapy source. We normally use about 400 MBq. No need to convert to curies as 1Bq = 1 disintegration/second.Third, you do claim to have remarkably easy access to radioactive material for one as ignorant as you seem to be of the subject. If you really do have a naked teletherapy source, I strongly advise you to seek medical attention, and if not, to at least engage the services of a competent health physicist before contemplating playing with such toys.
Anyone can, but I really shouldn't - this is the sort of error that kills patients.Anyway, given that the doserate from a teletherapy source is in the order of 1 - 2 gray/minute at 1 meter, and a lethal dose is about 5 gray, I do hope our friend has some remote handling device for it. Otherwise he's on course for a Darwin if not a Nobel.I thought the Dunning-Kruger bug was only carried by government health and safety inspectors, though it is known to be infectious.
It's just as well I'm a government H+S person (not actually an inspector, but...) with a sense of humour isn't it.