Please help poor Thornton out on the Uranium questions

[stcordova]

[Paul Giem]

[Paul Giem]

Sal, can you enable superscript and subscript?

[Paul Giem]

I just figured out the correct formula for the 95th percent confidence limit if one finds carbon-14 in 10 out of samples. It is the 10th root of 0.05, or 0.74, multiplied by 10. That is, if we expect 7.4 out of the 10 samples, or more, to have measurable carbon-14, then equal to or greater than 5% of the time we will find that all 10 of our samples have carbon-14.

[stcordova]

[stcordova]

I am a member of CRS and have access to Rotta's paper. Incredible. Public domain portions I will post here if I have time.

[stcordova]

[sterusjon]

Stcordova,

I am confused by N = number Uranium atoms in your prior entry. What you posted seems complete with only references to N. Does N refer to Thorium as another, albeit weaker, source of C?

Stephen

[stcordova]

SteRusJon,

Thank you, I made a mistake, and corrected it to Thorium. I'm still working through the paper and it seems this section is a bit confusing in the paper. I'm trying my best to summarize the salient points. I can e-mail you the paper if you think you can help me uncoil it. I might try to see if some of the nuclear chemistry students at JMU can help me work the problem out.

Sal

[sterusjon]

Sal,

Please forward the paper to me. I do not know how much help I can be since the cobwebs are rather dense in the my mind's physics archive. But, right now, I am in the mood for a little house cleaning in that section.

Stephen