Performance of silicon-drift detectors in kaonic atom X-ray measurements

✍ Scribed by M. Bazzi; G. Beer; L. Bombelli; A.M. Bragadireanu; M. Cargnelli; G. Corradi; C. Curceanu (Petrascu); A. d’Uffizi; C. Fiorini; T. Frizzi; F. Ghio; B. Girolami; C. Guaraldo; R.S. Hayano; M. Iliescu; T. Ishiwatari; M. Iwasaki; P. Kienle; P. Levi Sandri; A. Longoni; V. Lucherini; J. Marton; S. Okada; D. Pietreanu; T. Ponta; A. Rizzo; A. Romero Vidal; A. Scordo; H. Shi; D.L. Sirghi; F. Sirghi; H. Tatsuno; A. Tudorache; V. Tudorache; O. Vazquez Doce; E. Widmann; J. Zmeskal

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 479 KB
• Volume: 628
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2010.06.332

✦ Synopsis

Large-area silicon drift detectors (SDDs) were used for the first time in the background condition of a collider for precision spectroscopy of the kaonic atom X-rays in the SIDDHARTA experiment for the study of the strong interaction in a low-energy regime. The measurements were performed at the DAFNE electron-positron collider (LNF, Italy), using gas targets of hydrogen, deuterium, helium-3, and helium-4. A test measurement using the kaonic 4 He X-rays showed an excellent performance of the SDD devices under the beam conditions, and a good background suppression capability using the time correlation between the kaonic atom X-rays and the back-to-back correlated K + K À pairs produced by j decays.