But their email address details are due entirely to his arbitrary alterations in the decay formula — changes for which there was neither a theoretical foundation nor a shred of real proof.

In conclusion, the efforts by creation “scientists” to strike the dependability of radiometric relationship by invoking alterations in decay prices are meritless. There has been no modifications noticed in the decay constants of the isotopes utilized for dating, and also the changes induced in the decay prices of other radioactive isotopes are minimal. These observations are in line with concept, which predicts that such modifications should always be really small. Any inaccuracies in radiometric relationship as a result of alterations in decay prices can total, for the most part, a percent that is few.


Several creationist writers have actually criticized the dependability of radiometric relationship by claiming that a few of the decay constants,

Particularly those for 40 K, aren’t well known (28, 29, 92, 117). A typical assertion is these constants are “juggled” to carry outcomes into contract; as an example:

The“branching that is so-called, which determines the total amount of the decay product that becomes argon (rather than calcium) is unknown by an issue as high as 50 per cent. Considering that the decay price can be unsettled, values of the constants are selected which bring potassium dates into as close correlation with uranium times as you possibly can. (92, p. 145)

There appears to be some difficulty in determining the decay constants when it comes to K 40 -Ar 40 system. Geochronologists make use of the branching ratio as being a semi-empirical, adjustable constant which they manipulate in the place of utilizing a detailed half-life for K 40. (117, p. 40)

These statements could have been real when you look at the 1940s and very early 1950s, once the method that is k-Ar first being tested, nonetheless they are not real when Morris (92) and Slusher (117) wrote them. Because of the mid- to belated 1950s the decay constants and branching ratio of 40 K had been proven to within a couple of per cent from direct laboratory counting experiments (2). Today, all of the constants when it comes to isotopes utilized in radiometric relationship are recognized to much better than 1 %. Morris (92) and Slusher (117) have actually chosen obsolete information out of old literary works and attempted to express it whilst the present state of real information.

Regardless of the claims by Cook (28, 29), Morris (92), Slusher (115, 117), DeYoung (37) and Rybka (110), neither decay prices nor abundance constants are an important supply of mistake in every for the principal dating that is radiometric. Your reader can satisfy himself on easily this aspect by reading the report by Steiger and Jaeger (124) while the sources cited therein.


Neutron response modifications when you look at the U-Th-Pb series reduce “ages” of billions of years to some thousand years since most of this Pb can be caused by neutron responses rather rather than radioactive decay. (117, p. 54)

Statements such as this one by Slusher (117) may also be created by Morris (92). These statements springtime from a quarrel manufactured by Cook (28) which involves the utilization of wrong presumptions and data that are nonexistent.

Cook’s (28) argument, duplicated in certain information by Morris (92) and Slusher (117), will be based upon U and Pb isotopic measurements produced in the 1930s that are late very early 1950s on uranium ore examples from Shinkolobwe, Katanga and Martin Lake, Canada. Here, i personally use the Katanga instance showing the deadly mistakes in Cook’s (28) proposition.

Dining dining Table 4: Uranium, Thorium, and Lead Analyses for a sample (Nier 2) of Uranium Ore from Shinkolobwe, Katanga, as Reported by Faul (46). Data from Nier (100)
206 Pb/ 238 U age = 616 million years
206 Pb/ 207 Pb age = 610 million years weight that is element in ore) Pb isotopes(percent of total Pb)
U = 74.9 204 Pb = —–
Pb = 6.7 206 Pb = 94.25
Th = — 207 Pb = 5.70
208 Pb = 0.042

Within the 1930s that are late Nier (100) published Pb isotopic analyses on 21 types of uranium ore from 14 localities in Africa, European countries, Asia, and the united states and determined easy U-Pb many years of these examples. Several of those information had been later on put together into the written guide by Faul (46) that Cook (28) cites once the way to obtain their data. Dining Table 4 listings the information for just one sample that is typical. Cook notes the obvious lack of thorium and 204 Pb, therefore the existence of 208 Pb. He reasons that the 208 Pb could not need come from the decay of 232 Th because thorium is missing, and may not be typical lead because 204 Pb, that is contained in all typical lead, is absent. He causes that the 208 Pb within these examples could only have originated by neutron responses with 207 Pb and that 207 Pb, consequently, would additionally be produced from Pb-206 by similar responses:

Cook (28) then proposes why these results need modifications to the lead that is measured ratios as follows:

(1) the 206 Pb lost by conve rsion to 207 Pb must certanly be added right back towards the 206 Pb; (2) the 207 Pb lost by transformation to 208 Pb must certanly be added back into the 207 Pb; and (3) the brazil cupid 207 Pb gained by conversion from 206 Pb must be subtracted through the 207 Pb. He presents an equation to make these modifications:

In line with the assumption that the neutron-capture cross parts 7 for 206 Pb and 207 Pb are equal, an presumption that Cook (28) calls “reasonable. ” Cook then substitutes the typical values (which differ somewhat through the values listed in Table 4) for the Katanga analyses into their equation and determines a corrected ratio 8:

This calculation is duplicated by both Morris (92) and Slusher (117). Cook (28), Morris (92), and Slusher (117) all remember that this ratio is near to the day that is present ratio of 206 Pb and 207 Pb from 238 U and 235 U, respectively, and conclude, consequently, that the Katanga ores are extremely young, perhaps not old. For instance, Slusher (117) states: