Potentialities of CdZnTe Quasi-Hemispherical Detectors for Hard X-ray Spectroscopy of Kaonic Atoms at the DAΦNE Collider

Kaonic atom X-ray spectroscopy is a consolidated technique for investigations on the physics of strong kaon–nucleus/nucleon interaction. Several experiments have been conducted regarding measurement soft emission (<20 keV) from light kaonic atoms (hydrogen, deuterium, and helium). Currently, there new research activities within framework SIDDHARTA-2 experiment EXCALIBUR proposal focusing performing precise accurate measurements hard X-rays (>20 intermediate (carbon, aluminum, sulfur). In this context, we investigated cadmium–zinc–telluride (CdZnTe or CZT) detectors, which recently demonstrated high-resolution capabilities gamma-ray detection. A demonstrator prototype based quasi-hemispherical detector custom digital pulse processing electronics was developed. The covered detection area 1 cm2 with single readout channel interesting room-temperature performance energy resolution 4.4% (2.6 keV), 3% (3.7 1.4% (9.3 FWHM at 59.5, 122.1, 662 keV, respectively. results DAΦNE collider INFN National Laboratories Frascati (Italy) are also presented particular attention to effects rejection electromagnetic hadronic background.