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DF3VI > PHYSIC 25.11.05 16:30l 21 Lines 871 Bytes #999 (30) @ WW
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Subj: Re^2: Re E=mcı
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Sent: 051125/1519z @:DB0II.#NRW.DEU.EU [BCM M'Gladbach] obcm1.06b55 LT:030
From: DF3VI @ DB0II.#NRW.DEU.EU (Patrick)
To: PHYSIC @ WW
Reply-To: DF3VI @ DB0OVN.#NRW.DEU.EU
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> From: VK2AWZ@VK2XGJ.NSW.AUS.OC
> OK I am a bit dumb, but why URANIUM and enrichment, a huge complex at Las
> Alamos, heavy water and all that stuff.
Nuclear fission only works with atoms that are so big that they are not stable.
Uranium slowly "disintegrates" over time. You can accelerate this if you
bring enough of U235 (which is easilier fissionable than normal U238) together
- the so called critical mass. This is why enrichment is needed. Uranium ore
does not have enough U235 to start a chanin reaction.
> How about a hunk of lead that has a lot of mass??
The biggest atom that is stable is the lead atom. You cannot use this for
nuclear fission. It actually is the end product of natural nuclear decay.
73, Patrick
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