An experimental apparatus was built to measure life-times of excited nuclear states with the recoil-distance method (RDM). A millesimal micrometer and an electromagnetic gauge-head are used to measure the target-stopper distance, and their parallelism is tested by optical and capacitance methods. Measurements were performed in the nuclei 22Na and 153Dy, populated by the reactions 19F(α, n) and 144Nd(12C, 3n), respectively. A minimum target-stopper distance of ≅3ωm has been reached. © 1977.
A plunger device for in-beam measurements of nuclear lifetimes
SIGNORINI, COSIMO;
1977
Abstract
An experimental apparatus was built to measure life-times of excited nuclear states with the recoil-distance method (RDM). A millesimal micrometer and an electromagnetic gauge-head are used to measure the target-stopper distance, and their parallelism is tested by optical and capacitance methods. Measurements were performed in the nuclei 22Na and 153Dy, populated by the reactions 19F(α, n) and 144Nd(12C, 3n), respectively. A minimum target-stopper distance of ≅3ωm has been reached. © 1977.
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