Abstract

The Recoil Distance Method is known as a very powerful tool for measuring the lifetimes of excited nuclear levels in the picosecond region. Usually, for each level, coincidences with the shifted part of a feeding transition are used to avoid the bias from the accumulated delay in the higher lying cascade, by means of the Differential Decay Curve Method. Here, an integral version of the Decay Curve Method is proposed and discussed. This technique has several noticeable advantages, particularly when the overall statistics of the results is limited owing to the weak beam current, as expected with radioactive ion beams.

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