Abstract
To extend the applicability of the delayed coincidence method to the determination of half-lives up to 100 s, a small on-line computer has been programmed to work as a time analysing system with negligible dead time. The feasibility of measurements of such long half-lives is discussed in detail and compared to that of conventional time analyzers. The half-lives of the 1315.2 keV level in 177 Hf( T 1/2=1.08±0.06 s), of the 1663.1 keV level in 209Pb ( T 1/2=0.77±0.03 s) and of the ground state of 144In ( T 1/2=73±16 s) have been remeasured using this new method.
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