Register | Sign In


Understanding through Discussion


EvC Forum active members: 63 (9161 total)
4 online now:
Newest Member: popoi
Post Volume: Total: 915,585 Year: 2,842/9,624 Month: 687/1,588 Week: 93/229 Day: 4/61 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   Age Correlations and an Old Earth: Version 1 No 3 (formerly Part III)
Woodsy
Member (Idle past 3364 days)
Posts: 301
From: Burlington, Canada
Joined: 08-30-2006


Message 93 of 357 (369918)
12-15-2006 1:11 PM
Reply to: Message 90 by johnfolton
12-15-2006 11:43 AM


Radioactive decay and dating
Your post is really just gibberish. Where on earth do you get this ridiculous stuff?
Helium is, in fact, produced in radioactive decay; in alpha decay the emitted particle is a nucleus of helium. Granite is notorious for containing radioactive elements that undergo alpha decay.
When some minerals, including zircons, are formed, the chemistry of the process excludes some elements and includes others. In some useful cases, the parent in a decay is included but the progeny is not; thus any progeny found later are due to decay since the mineral formed.
Regards,
your neighbourhood radiochemist
Edited by Woodsy, : minor pedanticism
Edited by Woodsy, : title changed

This message is a reply to:
 Message 90 by johnfolton, posted 12-15-2006 11:43 AM johnfolton has not replied

Woodsy
Member (Idle past 3364 days)
Posts: 301
From: Burlington, Canada
Joined: 08-30-2006


Message 180 of 357 (377225)
01-15-2007 4:49 PM
Reply to: Message 179 by RAZD
01-15-2007 4:29 PM


Re: Carbon-13 Neutron Capture
Just a few items:
Pile-irradiated means exposed to neutrons in a nuclear reactor.
A cross-section is really something like a reaction probability. It has units of area. A barn is 1x10^-24 square centimetres.
What they are saying is that because the reaction with nitrogen procedes easily (high cross section) and it is hard to get rid of nitrogen, they had to increase the amount of carbon-13 in their target to be able to get a useful signal from its reaction.
Edited by Woodsy, : grammar

This message is a reply to:
 Message 179 by RAZD, posted 01-15-2007 4:29 PM RAZD has replied

Replies to this message:
 Message 181 by RAZD, posted 01-15-2007 5:42 PM Woodsy has not replied

Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024