Development of a liquid Xe photon detector for μ→eγ decay search experiment at PSI

Author

Mihara, S. ; Doke, T. ; Kamiya, Y. ; Mashimo, T. ; Mori, T. ; Nishiguchi, H. ; Ootani, W. ; Orito, S. ; Ozone, K. ; Sawada, R. ; Suzuki, S. ; Tejuna, G. ; Terasawa, K. ; Yahagi, K. ; Yamashita, M. ; Yashima, J.

Author_Institution

Int. Center for Elementary Particle Phys., Tokyo Univ., Japan

Volume

1

fYear

2000

fDate

2000

Abstract

We are developing a new type of photon detector for an experiment searching for muon decays to positron+gamma with a sensitivity of 10^-14 branching ratio by using the world most intense continuous muon beam provided at PSI. In this experiment the photon detector utilizes liquid xenon as a scintillation material because of its fast response, large light output yield, and high density. Scintillation light emitted in liquid Xe is directly observed by photomultipliers (PMTs) located in a liquid without any transmission window in order not to lose light yield. To study the detector response to gamma rays we constructed a prototype with an active volume of 2300 cm³ surrounded by 32 PMTs. The PMT was newly developed so as to be operated even in liquid Xe at 165 K. The energy, position, and timing resolution have been evaluated with gamma-ray sources from 320 keV to 1835 keV. The performance of the prototype is presented

Keywords

gamma-ray detection; liquid scintillation detectors; photomultipliers; position sensitive particle detectors; 165 K; 320 to 1835 keV; Xe; energy resolution; gamma rays; light yield; liquid Xe photon detector; photomultipliers; position resolution; timing resolution; Energy resolution; Gamma ray detection; Gamma ray detectors; Gamma rays; Mesons; Photomultipliers; Prototypes; Solid scintillation detectors; Timing; Xenon;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2000 IEEE

Conference_Location

Lyon

ISSN

1082-3654

Print_ISBN

0-7803-6503-8

Type

conf

DOI

10.1109/NSSMIC.2000.949134

Filename

949134