Corrections from extending dead times with activity measurements on radionuclides decaying via metastable states

The dead-time corrections for an extending dead time are analyzed for measurements on radionuclides decaying via metastable states and correction formulas are developed. It is shown that for large dead times with lambdatau >> 1(lambda = decay constant, tau = dead time) the dead-time correction approximates the usual case of a prompt decay besides a term that enlarges the dead-time correction. (orig.)