Archaeological dating isotopes
In a stratigraphical context objects closer to the surface are more recent in time relative to items deeper in the ground.
Finally, archaeologists could determine the ages of their finds—provided they were organic and between 500 and 50,000 years old.Ionization smoke detectors use an ionization chamber and a source of ionizing radiation to detect smoke.This type of smoke detector is more common because it is inexpensive and better at detecting the smaller amounts of smoke produced by flaming fires.Therefore if the proportion of carbon 14 to carbon 12 is known at the start, the age of the specimen can be found once the amount of carbon 14 remaining in it has been measured.It has been found that the activity of carbon 14 in living materials is about 19 counts per minute per gram of specimen.
Search for archaeological dating isotopes:
The technique depends on the existence in nature of different forms, or isotopes, of carbon.