To extent possibilities for studies with RIBs, a project of new in-flight facility for low energy 35-60 AMeV primary beams with 3 ≤ Z ≤ 36 has been started in 2011. In the status of the project is presented. Unique instrumentation as a cryogenic tritium target system and a variety of detector setups, which are actively being developed at FLNR with ACCULINNNA collaborators opens a new possibilities for low-energy nuclear-reaction studies.
An important instrumentation at ACCULINNA facility is the Optical Time Projection Chamber (OTPC), developed at the University of Warsaw [2,3]. The OTPC represents a modern type of ionization chamber with amplification stage formed by a stack of GEM foils and optical readout consisting of a CCD camera and a photomultiplier tube (PMT). The images recorded by the CCD camera together with the time distribution of light collected in the PMT allows to reconstruct the trajectory of the decay products [2,3]. Such an approach is ideally suited to study the decay by (multi-) particle emission of very exotic isotopes the angular correlations between emitted particles . The OTPC technique opens the possibility to investigate a broad range of rare decay modes with very high sensitivity. The detection of one decay event is sufficient to unambiguously identify the decay mode and whereas a few events is enough to establish its branching ratio.
In the last few years ‘the OTPC detection technique’ has been successfully applied measure β-delayed proton emission [3-7]. The results of the last experiment at ACCULINNA - β-delayed particle emission from 27S are presented .
The possibilities for the OTPC setup at the ACCULINNA separator and at the new ACCULINNA-2 in-flight facility will be discussed.
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