Although Cook’s (28) logic may, superficially, appear reasonable and simple, it is suffering from a few severe flaws that are fundamental. First, 204 Pb is certainly not missing within the Katanga examples; it merely had not been calculated! In the report, Nier (100) states:
Really, in 20 regarding the 21 samples investigated the actual quantity of typical lead can be so small this one do not need to just just simply take account for the variations with its structure. In many examples where in actuality the abundance of 204 Pb ended up being really low no effort ended up being built to assess the number of it because the determination will be of no value that is particular. (100, p. 156)
Evidently, neither Cook (28), Morris (92), nor Slusher (117) bothered to see Nier’s (100) complete report and mistakenly interpreted the dash for 204 Pb in Faul’s (46) tabulation as “zero, ” whenever, in reality, this means “not measured. ”
2nd, the cross that is neutron-capture for 206 Pb and 207 Pb aren’t equal, as Cook (28) assumes,
But vary by a factor of 24 (0.03 barns for 206 Pb, 0.72 barns for 207 Pb ‡ ). This discrepancy possesses effect that is significant the results of Cook’s (28) calculation. Dining Table 5 compares the outcome regarding the three types of age calculation — the method that is correct Cook ’s (28) technique, and Cook’s technique with all the proper nuclear cross sections — using the currently accepted most readily useful values for the bbwdesire coupons uranium decay price and abundance constants. The proper radiometric age is, needless to say, the systematic worth of 622 million years. Whenever Cook’s (28) calculation is completed with appropriate allowance for the unequal neutron-capture cross sections of 206 Pb and 207 Pb, the ensuing determined age is clearly more than the clinical value, therefore whether or not such neutron reactions had taken place, the consequence will be the reverse of that reported by Cook (28). Note additionally that even Cook’s (28) wrong calculation leads to a chronilogical age of 70 million years, perhaps maybe not “practically zero” as asserted by Slusher (117).