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Such extremely low concentrations can only be determined with Accelerator Mass Spectrometry, short AMS.

Traces of such events are found on Earth or the Moon and can be detected using accelerator mass spectrometry, or AMS for short.

She used a sensitive technique known as accelerator mass spectrometry to detect minute amounts of radiocarbon, which she hoped would shed light on when—and why—such an event might have happened.

As she worked, Hayeur Smith entered her data and extracted small samples for further analysis and testing, including a type of radiocarbon dating called accelerator mass spectrometry.

In 2014, Dr. Terberger and a team of German and Russian scientists tested samples from the idol’s core — uncontaminated by previous efforts to conserve the wood — using accelerator mass spectrometry.