The Advanced Plunger-Particle detector Array ( APPA ) is a new plunger device constructed to measure lifetimes of excited states in exotic nuclei, particularly those near the N = Z line. This instrument combines a compact plunger device with a charged-particle detector array to increase the experimental sensitivity for low-cross-section lifetime measurements employing fusion-evaporation reactions. APPA can be used in conjunction with the JUROGAM 3 germanium-detector array and with the RITU or MARA recoil separators available at the Accelerator Laboratory of the University of Jyväskylä (JYFL-ACCLAB). This article outlines the technical details of APPA , presents the lifetime measurement of the 2⁺₁ 2 1 + state in 62 Zn, and reports the effect of APPA on the transmission efficiency of MARA and prompt γ γ -ray and JYUTube detection efficiencies.
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Uusikylä et al. (2026) studied this question.
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