Measurement of the photon detection inefficiency of electromagnetic calorimeters at energies below 1 GeV

被引：9

作者：

Ajimura, S

Arisaka, K

Barrio, M

Fujiwara, T

Hidaka, S

Hotta, T

Hsiung, B

Ikegami, Y

Inagaki, T ^{[1
]}

Kabe, S

Kessler, R

Kobayashi, S

Kurashige, H

Kurebayashi, K

Matsumura, T

Miyahara, T

Mori, K

Nakagawa, T

Nakamura, T

Nakano, T

Nomura, T

Okuno, H

Sasao, N

Sato, T

Shinkawa, T

Suzuki, I

Tripathi, A

Tsukamoto, T

Wah, Y

Watanabe, H

Winstein, B

Yamanaka, T

机构：

[1] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

[2] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

[3] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[4] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[5] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[6] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[7] Saga Univ, Dept Phys, Saga 8408502, Japan

[8] Miyazaki Univ, Dept Appl Phys, Miyazaki 8892192, Japan

[9] Natl Def Acad Japan, Yokosuka, Kanagawa 2398686, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2005年 / 552卷 / 03期

基金：

美国国家科学基金会;

关键词：

electromagnetic calorimeter; photon detection inefficiency K-L(0) -> pi(0) nu nu decay;

D O I：

10.1016/j.nima.2005.06.070

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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-y = 100 MeV, and decreases to 2 x 10(-7) at E-y = 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. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：263 / 275

页数：13

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