To: All Rcvd: NO Re: Nonequilibrium Radiocarbo Status: Public I got the following info fro
From: King Of All Crackpots Sent: 042794 15:35
To: All Rcvd: NO
Re: Nonequilibrium Radiocarbo Status: Public

I got the following info from an article by Robert L. Whitelaw. [1]
Definitions
SPR: Specific Production Rate of C14 atoms in the earth's
atmosphere by cosmic radiation in atoms per min. per gram of
total carbon in the earth's active carbon inventory. This
total inventory is defined as all carbon in the cycle from
atmospheric CO^2 to living things and back again.
SDR: Specific Decay Rate of C14 atoms in any specimin of a
living or once living thing in atoms per min. per gram of total
carbon in the specimin. For living things on earth today, this
is approximately equal to 16 disintigrations per min per gram
of total carbon which corresponds roughly to 1.4 atoms of C14
per trillion atoms of total C.
The Radiocarbon Dating Method
1) Cosmic radiation bombards the atmosphere with energetic particles of
1 to 2 BeV.
2) Neutrons of 5 to 10 MeV are generated
3) Two reactions take place after the neutrons are slowed down
14 14 1
N + n => C + H 98% of reactions of neutrons of 0.41.6 MeV
14 12 3
N + n => C + H Remaining reactions
4) C14 oxidizes to form CO and diffuses to produce a fairly uniform
2
14 12
C /C oxide ratio 2
5) The average neutron intensity is 2.6 n/cm sec
2
6) The know carbon inventory in g/cm (7.25 in ocean carbonates, 0.59 in
dissolved ocean organics. 0.33 in the biosphere, 0.12 in the atmosphere)
yeilds a value for SPR of (2.6)(60)/8.3=18.8 atoms/gmin
7) SDR is 16.1 + 0.5 dis/gmin based on the 1950 halflife of 5568 yrs

(Libby's original paper appeared in 1952). If the world was billions of
years old, the SDR should have long since come into equilibrium with the
SPR
8) Libby assumed the two numbers equal. He later corrected the 16.1 figure
to account for the C13/C12 ratio. The new value was 15.3
In the noneqilibrium method od radiocarbon dating, it is not assumed that
the SPR and SDR are equal. It, instead, assumes an exponential buildup for
SDR
starting from zero at creation.
Robert H. Brown has derived a formula for converting "radiocarbon time"
to real time [2].
2.211(5.35  T) 1
R = T + 8.3 [ln(10.989e ) ]
where R is the radiocarbon date in thousands of years and T is the real
time before present (present = 1950) in thousands of years. Unfortunately
he doesn't give a complete derivation of the formula. He gives an equation
that must be calibrated to the Bible. But there's no explanation for where
this equation came from.
Some examples of the conversion follow:
T R
0 0
3100 3160
3700 3920
4300 5150
4900 8680
5250 18320
5350 42780
This method is apparently specific to the C14 dating method so
it would have no direct effect on geologic dating. And, of
course, if you don't accept the Bible [as factual], then you
don't accept the calibration.
References
CRSQCreation Research Society Quarterly
[1] Robert L Whitelaw CRSQ March 1993 pg 170183. Note: This article
is really just an overview of various creationist papers on radiocarbon
dating.
[2] Robert H Brown CRSQ June 1992 pg 4547.

Ray Cote
EMail Fredric L. Rice / The Skeptic Tank
