ABSTRACT
Precise dating of surface landforms is a very difficult task that requires measurements of very low concentrations in small samples, with high precision, which cannot be done with con ventional techniques such as a-or β-counting or mass spectrometry. This was solved only when accelerator mass spectrometry (AMS) was introduced 20 years ago, for measurement of cosmogenic isotopes in rock samples. The most precise dating has been achieved with tandem accelerator mass spectrometry (TAMS) facilities.
