Argonne National Laboratory

Accelerator Mass Spectrometry (AMS)

Accelerator Mass Spectrometry (AMS)

Accelerator mass spectrometry (AMS) is a powerful method for the measurement of very low abundance nuclei (10-9 to 10-16) even in a background of much stronger isobars.

The technique at ATLAS is applicable to many rare nuclei for many scientific goals, but one of the most important areas of research at ATLAS is the measurement of cross-sections of astrophysical reactions by activation when the product nuclide cannot be measured by decay counting due to its long half-life. The ATLAS facility is the only laboratory where AMS of medium-heavy ions (90 < A < 150) is feasible with isobaric separation. Other programs have included dating of ocean water to understand flow rates and patterns and neutron capture cross-sections on a wide range of isotopes.