Half life can be defined as the time taken for the number of nuclei in a radioactive material to halve.
It can also be defined as the time taken for the count rate of a sample of radioactive material to fall to half of its starting level.
Others had tried to find an answer in geological processes—e.g.
the pattern was caused by the way the magma was emplaced or how it crystallized. But Drs Humphreys and Baumgardner realized that in other cases there were many independent lines of evidence that suggested that huge amounts of radioactive decay had indeed taken place.
Evolutionism, of course, requires billions of years to support the plausibility of life's emergence and of subsequent Evolution from “amoeba” to man.
Theoretically, Creationism remains workable within a wide range of age estimates.
any method of determining the age of earth materials or objects of organic origin based on measurement of either short-lived radioactive elements or the amount of a long-lived radioactive element plus its decay product.
A method for determining the age of an object based on the concentration of a particular radioactive isotope contained within it.
When physicist Dr Russell Humphreys was still at Sandia National Laboratories (he now works full-time for ICR), he and Dr John Baumgardner (still with Los Alamos National Laboratory) were both convinced that they knew the direction in which to look for a definitive answer to the puzzle of why radiometric dating consistently gives ages of millions and billions of years.But it is possible to measure the time taken for half of the nuclei in a radioactive material to decay.This is called the half life of radioactive material or radioisotope.The release of radiation by unstable nuclei is called radioactive decay.This process occurs naturally and cannot be influenced by chemical or physical processes.