Re: decay of radioactive isotopes
From: Michael Moroney (moroney_at_world.std.spaamtrap.com)
Date: 06/29/04
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Date: Tue, 29 Jun 2004 23:22:23 +0000 (UTC)
fd_news@hotmail.com (Frederik) writes:
>Hello,
>Is it possible for a certain radioactive isotope to decay into
>different elements?
Yes.
> For example, can potassium-40 (K-40) decay to
>argon-40 (Ar-40),
Yes.
> as well as to K-39 or K-41? Is this or any similar
>example possible?
No (to do so would require it to emit or magically grow a neutron).
It can (and does) beta decay into Ca-40.
>I read somewhere that only 11% of the K-40 elements confined in some
>type of earth layers decays to Ar-40. The remainder would then decay
>to stable isotopes of potassium. The only non-radioactive isotopes of
>K, that I know, are K-39 and K-41.
As noted, Ca-40, not other potassium isotopes.
-- -Mike
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