Radiocarbon dating by accelerator mass spectrometry
About 10 large pits, with diameters between 2-3 m (6.5-10 ft) and depths between .7-1.1 m (2.3-3.6 ft) were found surrounding the mammoth-bone structures at Mezhirich, filled with bone and ash, and are believed to have been used as either meat storage facilities, refuse pits or both.Internal and external hearths surround the dwellings, and these are filled with burnt mammoth bone. Stone tools are dominated by microliths, while bone and ivory tools include needles, awls, perforators, and polishers.Accelerator Mass Spectrometry (AMS) is a technique for measuring the concentrations of rare isotopes that cannot be detected with conventional mass spectrometers.
At the kinetic energies typically used in an AMS system it is possible to use well-established nuclear physics techniques to detect the individual C ions as they arrive at a suitable particle detector.
The archaeological site of Mezhirich (sometimes spelled Mezhyrich) is an Upper Paleolithic (Epigravettian) site located in the Middle Dnepr (or Dneiper) Valley region of Ukraine near Kiev, and it is one of the best-preserved sites of its type excavated to date.
Mezhirich is a large open-air site where several mammoth bone huts with hearths and pit features were used between about 14,000-15,000 years ago.
It is dedicated to the advancement of fundamental research, education, methods development and service.
"Radiocarbon" the journal of record of the field, has been published by the Arizona Board of Regents since 1989.