Abstract

A novel technique for particle identification of relativistic heavy ions has been developed utilizing a Heavy-Ion Ring Imaging Cherenkov detector (HIRICH) for velocity measurement. The HIRICH is characterized by a thin liquid or solid state radiator, a proximity focusing geometry and a fast gaseous photon detector with CsI photon converter. A velocity resolution of Δ β/ β=8×10 −4 (fwhm) has been measured for Ru 44+ particles of β≃0.85. The detector design and the performance in heavy-ion reaction studies at the GSI-Darmstadt are presented.

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