27-June-2005, 10:32 PM
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Senior Member
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Join Date: May 2003
Location: Middle of Nowhere, Kentucky
Posts: 2,518
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Originally Posted by Arneb
Tobin dax wrote
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Alright, I'm confused. The first step in the PPI chain creates deuterium, which then gets made into helium3. I'm pretty sure that the PPI chain happens outside of BBN, so would you please explain your answer to me, Arneb?
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So here's paying my debt to you, Tobin Dax
Here is a somewhat detailled article about what I meant.
Here is a report about an attempt to find a significant D source in AGN, which was not successful.
And if it's in Wikipedia, it must be true, right? 
So yeah, saying "never anywhere" was a bit over the top; I should have excluded D as an intermediate product in nucleosynthesis by stressing net production - but I think in principle, for the purposes of a quiz, the question & answer were valid.
Edit: Clarification
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I see your point, Arneb. My thought was just that the BB isn't the only place that D is produced, even most of it produced since BBN was also made into heavier isotopes. Still, BBN isn't the *only* place deuterium is produced.
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