Radioactive isotope dating definition
It must be noted though that radiocarbon dating results indicate when the organism was alive but not when a material from that organism was used.
There are three principal techniques used to measure carbon 14 content of any given sample— gas proportional counting, liquid scintillation counting, and accelerator mass spectrometry.
It also allows the estimation of the age of geological samples using the decay of long lived nuclides.
All radioactive decays follow first order kinetics.
It is assumed that level of carbon-14 in the atmosphere is constant.
An age could be estimated by measuring the amount of carbon-14 present in the sample and comparing this against an internationally used reference standard.
Radiocarbon, or carbon 14, is an isotope of the element carbon that is unstable and weakly radioactive. Carbon 14 is continually being formed in the upper atmosphere by the effect of cosmic ray neutrons on nitrogen 14 atoms.
Some of the application of tracer techniques are discussed below.The man's body was recovered and pieces of tissue were studied for their C content by accelerator mass spectroscopy.The best estimate from this dating technique says the man lived between 33 BC. From the ratio, the time since the formation of the rock can be calculated.In this method, the sample is in liquid form and a scintillator is added.This scintillator produces a flash of light when it interacts with a beta particle.