Gakushuin Natural Radiocarbon Measurements III

Abstract

This date list covers many of the datings done from November 1962 to October 1963. The instruments and technique used for this work are essentially the same as those used for the previous work (Gakushuin II). Age calculations are based on the Libby half life of C14, 5570 ± 30 yr. The errors quoted are the standard deviations obtained from the number of counts only. When observed activities are less than 2a above background, infinite dates are given with a limit corresponding to the activity of 3σ, and when they are greater than the activity of 95% of NBS oxalic-acid standard minus 2a, modern dates are given with the limit equal to 3a below the 95% of NBS standard.