Wörterbuch (en): Accelerator mass spectrometry (AMS)
de: 
Beschleunigungs-Massenspektrometrie (f) 
fr: 
Spectrométrie de masse par accélérateur (f) 
it: 
Spettrometria di massa con acceleratore (f) 
es: 
Espectrometría de aceleración de masas (f) 
A form of mass spectrometry. The method is used for numerous isotopes, usually long-lived radionuclides. AMS is used to measure the ratio of one (radio)isotope to another - usually stable - isotope of the same element.