A new ESR dating method--ROSY ESR dating program is introduced. It enabled us to calculate the beta attenuation in thin layers of tooth enamel based on "One Group" theory. This approach leads to average beta doses which are significantly lower than those from Grün’s DATA software
but more close to the results from calculation based on Monte Carlo data. The ages of six tooth enamel samples from Yunxian site
Hubei
were determined and compared with each other by using ROSY and DATA programs.