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Step into the Center for Accelerator Mass Spectrometry at Lawrence Livermore National Laboratory on any given day, and you may see researchers tracking the dynamics of the Earth’s carbon cycle, searching for signatures of nuclear fuel reprocessing or determining the age of remains from the Chicago Police Department’s cold case files.

These vastly different projects have one thing in common: They all use accelerators to measure levels of carbon-14 and other isotopes.

Radiocarbon dating is a method of estimating the age of organic material.

It was developed right after World War II by Willard F.

Nuclear reactions provide us with enormous amounts of energy.Carbon-based rocks, such as bitumen and tephra, can also be dated in this manner.Carbon dating is most effective on material that predates the 1940s; this is due to above-ground nuclear tests increasing the amount of carbon-14 in the environment.In AMS, researchers direct a beam of cesium ions at a sample.This causes the sample to eject atoms, which are then filtered by magnetic and electric fields and sent into a detector that counts them.Free 5-day trial What can the sun do that we can't? Are radioactive isotopes helpful in the medical field?