Title of article
Measurement of the photon detection inefficiency of electromagnetic calorimeters at energies below 1 GeV
Author/Authors
Ajimura، نويسنده , , S. and Arisaka، نويسنده , , K. and Barrio، نويسنده , , M. and Fujiwara، نويسنده , , T. and Hidaka، نويسنده , , S. and Hotta، نويسنده , , T. and Hsiung، نويسنده , , B. and Ikegami، نويسنده , , Y. and Inagaki، نويسنده , , T. and Kabe، نويسنده , , S. and Kessler، نويسنده , , R. and Kobayashi، نويسنده , , S. and Kurashige، نويسنده , , H. and Kurebayashi، نويسنده , , K. and Matsumura، نويسنده , , T. and Miyahara، نويسنده , , T. and Mori، نويسنده , , K. Yuasa-Nakagawa، نويسنده , , T. UEDA-NAKAMURA، نويسنده , , T. and Nakano، نويسنده , , T. and Nomura، نويسنده , , T. and Okuno، نويسنده , , H. and Sasao، نويسنده , , N. and Sato، نويسنده , , T. and Shinkawa، نويسنده , , T. and Suzuki، نويسنده , , I. and Tripathi، نويسنده , , A. and Tsukamoto، نويسنده , , T. and Wah، نويسنده , , Y. and Watanabe، نويسنده , , H. and Winstein، نويسنده , , B. and Yamanaka، نويسنده , , T.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
13
From page
263
To page
275
Abstract
The photon detection inefficiency of electromagnetic calorimeters due to photonuclear reactions has been studied at photon energies below 1 GeV using a tagged-photon beam at the KEK-Tanashi 1.3-GeV electron synchrotron. Photonuclear reactions are identified by detecting low-energy neutrons with liquid scintillation counters surrounding the sample calorimeter. For a Cesium Iodide (CsI) calorimeter with a detection threshold of 10 MeV, the inefficiency due to photonuclear reactions is 10 - 4 at E γ = 100 MeV , and decreases to 2 × 10 - 7 at E γ = 1 GeV . For a lead-scintillator sampling calorimeter, the inefficiency is larger than the above values by a factor of 2–3, reflecting the sampling effect after photonuclear reactions. By decreasing the detection threshold down to 1 MeV, the inefficiencies are reduced by a factor of 10 for both types of calorimeters.
Keywords
Electromagnetic calorimeter , Photon detection inefficiency K L 0 ? ? 0 ? ? ¯ decay
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Serial Year
2005
Journal title
Nuclear Instruments and Methods in Physics Research Section A
Record number
2199289
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