The response of a scintillation detector array consisting of 7 pure CsI crystals with a thickness of 13.5 radiation lengths has been measured to electrons, positrons and charged pions with momenta ranging from 250 to 1000 MeV/c. For electrons and positrons the detector provides a very linear response to the incident energy. High energy charged pions make a peak at around 150 MeV corresponding to the ionization energy loss. In addition to the peak, comparable yields which are caused by nuclear reactions are distributed up to the maximum available energy and form a broad bump. The shape of the broad bump for positive pions is different from that for negative pions with the same momentum. A simulation with a GEANT program cannot reproduce the shape of the broad bump.
|Number of pages||8|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 1997 Jun 11|
ASJC Scopus subject areas
- Nuclear and High Energy Physics