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Re: 129I/129Xe
- To: meteorite-list@meteoritecentral.com
- Subject: Re: 129I/129Xe
- From: WBranchsb@aol.com
- Date: Tue, 14 Oct 1997 18:37:54 -0400 (EDT)
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- Resent-Date: Tue, 14 Oct 1997 18:40:22 -0400 (EDT)
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>Chondrites contain 129 Xe in greater abundance than is found in the Solar
> System as a whole. This excess is attributed to the radioactive decay of
129
> I which was picked up by the chondrites during their formation 4.6 billion
> years ago. The 129 I is only formed in supernovae explosions and it quickly
> becomes extinct since it decays completely in about 100 million years. Thus
> the evidence of this nearby supernova explosion is brought to us in the
> "fossil" record of the chondrites.
Joel,
Why does the 129 Xe not continue to decay, once it is picked up by
chondrules? I mean, if it decays completely in 100 million years, why would
there be any detected in chondrules now?
-Walter
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