Nuclear Chemist Question:

C14 dating technique is usually used to find the age of dead organism. In this technique generally the concentration ratio of C14 to C12 is used in order to determine ages upto 20,000 years. This is widely used in archaeology. C14 has a half-life period of 5700 years. When an organism dies the C14 content in them begins to decay with its characteristic to the half-life period. The concentration of C14 / C12 decreases and this decrease from the equilibrium is used as a measure of the age of the sample.

C14 emits α β ray of low energy. In living samples , special counters with low background are used as the activity due to C14 is low in them.