Time-based Selection of Kaonic Atom X-ray Events with Quasi-Hemispherical CZT Detectors at the DAFNE collider
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| Format: | Preprint |
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2025
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| author | Artibani, Francesco Abbene, Leonardo Buttacavoli, Antonino Bettelli, Manuele Gerardi, Gaetano Principato, Fabio Zappettini, Andrea Bazzi, Massimiliano Borghi, Giacomo Bosnar, Damir Bragadireanu, Mario Carminati, Marco Clozza, Alberto Clozza, Francesco Del Grande, Raffaele De Paolis, Luca Fiorini, Carlo Friscic, Ivica Guaraldo, Carlo Iliescu, Mihail Iwasaki, Masahiko Khreptak, Aleksander Manti, Simone Marton, Johann Moskal, Pawel Napolitano, Fabrizio Ohnishi, Hiroaki Piscicchia, Kristian Sgaramella, Francesco Silarski, Michal Sirghi, Diana Laura Sirghi, Florin Skurzok, Magdalena Spallone, Antonio Toho, Kairo Toscano, Lorenzo G. Doce, Oton Vazquez Zmeskal, Johann Curceanu, Catalina Scordo, Alessandro |
| author_facet | Artibani, Francesco Abbene, Leonardo Buttacavoli, Antonino Bettelli, Manuele Gerardi, Gaetano Principato, Fabio Zappettini, Andrea Bazzi, Massimiliano Borghi, Giacomo Bosnar, Damir Bragadireanu, Mario Carminati, Marco Clozza, Alberto Clozza, Francesco Del Grande, Raffaele De Paolis, Luca Fiorini, Carlo Friscic, Ivica Guaraldo, Carlo Iliescu, Mihail Iwasaki, Masahiko Khreptak, Aleksander Manti, Simone Marton, Johann Moskal, Pawel Napolitano, Fabrizio Ohnishi, Hiroaki Piscicchia, Kristian Sgaramella, Francesco Silarski, Michal Sirghi, Diana Laura Sirghi, Florin Skurzok, Magdalena Spallone, Antonio Toho, Kairo Toscano, Lorenzo G. Doce, Oton Vazquez Zmeskal, Johann Curceanu, Catalina Scordo, Alessandro |
| contents | This work presents the results of a time-based event selection for searching X-ray signals from kaonic atom X-ray transition using a single quasi-hemispherical Cadmium-Zinc-Telluride (CZT) detector at the DA$Φ$NE collider. To mitigate the high background level in the measured X-ray spectrum, a dedicated event selection strategy was developed, exploiting the precise timing correlation between e+e- collisions and detector signals. This approach enabled, for the first time, the observation of two characteristic X-ray transitions from kaonic aluminum atoms using a CZT detector: for the 5-4 transition at 50~keV, 362~$\pm$~41~(stat.)~$\pm$~20~(sys.) signal events over 1698~$\pm$~197~(stat.)~$\pm$~25~(sys.) background events in 5$σ$ were observed, with a resolution of 9.2\%~FWHM; for the 4-3 transition at 106~keV, 295~$\pm$~50~(stat.)~$\pm$~20~(sys.) signal events over 2939~$\pm$~500~(stat.)~$\pm$~16~(sys.) background events in 5$σ$ were measured, with a resolution of 6.6 ~FWHM. A strong background suppression of approximately 95\% of the triggered data was achieved through this time-based selection. The demonstrated timing capability of the CZT detector proved highly effective in isolating time-correlated events within an 80 ns window, setting an important benchmark for the application of these semiconductors in timing-based X-ray spectroscopy. These results highlight the potential of CZT-based detection systems for future precision measurements in high-radiation environments, paving the way for compact, room-temperature X-ray and $γ$-ray spectrometers in fundamental physics and beyond. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_02671 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Time-based Selection of Kaonic Atom X-ray Events with Quasi-Hemispherical CZT Detectors at the DAFNE collider Artibani, Francesco Abbene, Leonardo Buttacavoli, Antonino Bettelli, Manuele Gerardi, Gaetano Principato, Fabio Zappettini, Andrea Bazzi, Massimiliano Borghi, Giacomo Bosnar, Damir Bragadireanu, Mario Carminati, Marco Clozza, Alberto Clozza, Francesco Del Grande, Raffaele De Paolis, Luca Fiorini, Carlo Friscic, Ivica Guaraldo, Carlo Iliescu, Mihail Iwasaki, Masahiko Khreptak, Aleksander Manti, Simone Marton, Johann Moskal, Pawel Napolitano, Fabrizio Ohnishi, Hiroaki Piscicchia, Kristian Sgaramella, Francesco Silarski, Michal Sirghi, Diana Laura Sirghi, Florin Skurzok, Magdalena Spallone, Antonio Toho, Kairo Toscano, Lorenzo G. Doce, Oton Vazquez Zmeskal, Johann Curceanu, Catalina Scordo, Alessandro Instrumentation and Detectors This work presents the results of a time-based event selection for searching X-ray signals from kaonic atom X-ray transition using a single quasi-hemispherical Cadmium-Zinc-Telluride (CZT) detector at the DA$Φ$NE collider. To mitigate the high background level in the measured X-ray spectrum, a dedicated event selection strategy was developed, exploiting the precise timing correlation between e+e- collisions and detector signals. This approach enabled, for the first time, the observation of two characteristic X-ray transitions from kaonic aluminum atoms using a CZT detector: for the 5-4 transition at 50~keV, 362~$\pm$~41~(stat.)~$\pm$~20~(sys.) signal events over 1698~$\pm$~197~(stat.)~$\pm$~25~(sys.) background events in 5$σ$ were observed, with a resolution of 9.2\%~FWHM; for the 4-3 transition at 106~keV, 295~$\pm$~50~(stat.)~$\pm$~20~(sys.) signal events over 2939~$\pm$~500~(stat.)~$\pm$~16~(sys.) background events in 5$σ$ were measured, with a resolution of 6.6 ~FWHM. A strong background suppression of approximately 95\% of the triggered data was achieved through this time-based selection. The demonstrated timing capability of the CZT detector proved highly effective in isolating time-correlated events within an 80 ns window, setting an important benchmark for the application of these semiconductors in timing-based X-ray spectroscopy. These results highlight the potential of CZT-based detection systems for future precision measurements in high-radiation environments, paving the way for compact, room-temperature X-ray and $γ$-ray spectrometers in fundamental physics and beyond. |
| title | Time-based Selection of Kaonic Atom X-ray Events with Quasi-Hemispherical CZT Detectors at the DAFNE collider |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2511.02671 |