TY - JOUR
T1 - Measurement of the photon detection inefficiency of electromagnetic calorimeters at energies below 1 GeV
AU - Ajimura, S.
AU - Arisaka, K.
AU - Barrio, M.
AU - Fujiwara, T.
AU - Hidaka, S.
AU - Hotta, T.
AU - Hsiung, B.
AU - Ikegami, Y.
AU - Inagaki, T.
AU - Kabe, S.
AU - Kessler, R.
AU - Kobayashi, S.
AU - Kurashige, H.
AU - Kurebayashi, K.
AU - Matsumura, T.
AU - Miyahara, T.
AU - Mori, K.
AU - Nakagawa, T.
AU - Nakamura, T.
AU - Nakano, T.
AU - Nomura, T.
AU - Okuno, H.
AU - Sasao, N.
AU - Sato, T.
AU - Shinkawa, T.
AU - Suzuki, I.
AU - Tripathi, A.
AU - Tsukamoto, T.
AU - Wah, Y.
AU - Watanabe, H.
AU - Winstein, B.
AU - Yamanaka, T.
N1 - Funding Information:
The authors would like to thank the operating crew of the KEK-Tanashi 1.3-GeV electron synchrotron for their support throughout the experiment. This work was partly supported by a Grant-in-Aid for Scientific Research of the Ministry of Education, Science, Sports and Culture of Japan, and by the United States National Science Foundation.
PY - 2005/11/1
Y1 - 2005/11/1
N2 - 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 Eγ=100MeV, and decreases to 2×10-7 at Eγ=1GeV. 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.
AB - 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 Eγ=100MeV, and decreases to 2×10-7 at Eγ=1GeV. 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.
KW - Electromagnetic calorimeter
KW - Photon detection inefficiency K →πνν̄ decay
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U2 - 10.1016/j.nima.2005.06.070
DO - 10.1016/j.nima.2005.06.070
M3 - Article
AN - SCOPUS:26944460378
VL - 552
SP - 263
EP - 275
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 3
ER -