Using a delayed coincidence counting system to determine 223Ra, 224Ra in seawater sample

A Radium Delayed Coincidence Counter (RaDeCC) includes 3 channels ( 223Ra channel, 224Ra channel, and total channel). It has been newly designed and assembled at Nuclear Research Institute. To determine 223Ra and 224Ra in seawater samples, the system efficiency at all 3 channels were investigated and calibrated.