The absolute measurement and analysis of 198Au activation

198Au has a series of merits, such as the simple disintegration Chart, the single isotope constitute, the clear activation section, the high purity and the easy machining. Therefore, 198Au is used the first choice for the neutron flux absolute measurement. The activations absolute measurement for a set of 198Au samples which have been activated in reactor is finished through a suit of new type 4πβ-γ coincidence measurement device which is designed by ourselves in lab. By compare, these measurement values and theory values accord in range of uncertainty, the most uncertainty is less than 1.2%. We can draw a conclusion that the activation absolute measurement of this set of 198Au samples is reliable. (authors)