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Gamma ray spectroscopy with scintillation light in liquid xenon

K Ni et al 2006 JINST 1 P09004   doi: 10.1088/1748-0221/1/09/P09004  Help

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K Ni1, E Aprile, K L Giboni, P Majewski2 and M Yamashita
Physics Department and Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USA
1 Present address: Physics Department, Yale University, New Haven, CT 06511, USA
2 Present address: Department of Physics and Astronomy, University of Sheffield, UK
E-mail: kaixuan.ni@yale.edu

Abstract. Scintillation light from gamma ray irradiation in liquid xenon is detected by two Hamamatsu R9288 photomultiplier tubes (PMTs) immersed in the liquid. UV light reflector material, PTFE, is used to optimize the light collection efficiency. The detector gives a high light yield of 6 photoelectron per keV (pe/keV), which allows efficient detection of the 122 keV γ-ray line from 57Co, with a measured energy resolution of (8.8±0.6)% (σ). The best achievable energy resolution, by removing the instrumental fluctuations, from liquid xenon scintillation light is estimated to be around 6-8% (σ) for γ-ray with energy between 662 keV and 122 keV.

Key words: Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators); Liquid detectors; Gamma telescopes

E-print number: physics/0608034
Cited: by
Refers: to

Received 4 August 2006, accepted for publication 7 September 2006
Published 21 September 2006

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