A NEW DETECTOR ARRAY FOR CHARGED PARTICLE SPECTROSCOPY

Abstract A compact and highly segmented detector array consisting of 44 gas–silicon–caesium iodide, position sensitive, particle identification detector telescopes and up to 10 position-sensitive, silicon strip detectors has been constructed for the study of light-ion–heavy-ion reactions including cluster break–up in the energy range 5–15 MeV/nucleon. The detectors are housed in a purpose built vacuum chamber. The telescopes are placed in fixed positions, covering the forward hemisphere from 3 to 30° in the laboratory with the target placed at 535 mm from the front of the telescopes or 6–52° with the target placed at 215 mm. The strip detectors are placed in any of 30 fixed positions in the forward hemisphere. For 85 MeV 12 C ions the telescope energy resolution (gas plus silicon) is 345 keV with an angular resolution of 0.03°. Using the gas–silicon section ions with Z up to 21 can be identified. For ions that pass through the silicon isotopic identification is achieved using the silicon–CsI combination. The strip detector energy resolution is 200 keV, with an angular resolution of 0.1°.