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Gamma ray spectroscopy with scintillation light in liquid xenon

K Ni1, E Aprile, K L Giboni, P Majewski2 and M Yamashita

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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.

Keywords

Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)

Gamma telescopes

Liquid detectors

 

E-print Number: physics/0608034

Cited: by |

Refers: to

PACS

29.40.Mc Scintillation detectors

29.30.Kv X- and gamma-ray spectroscopy

07.85.Nc X-ray and gamma-ray spectrometers

85.60.Ha Photomultipliers; phototubes and photocathodes

Subjects

Accelerators, beams and electromagnetism

Electronics and devices

Nuclear physics

Instrumentation and measurement

Optics, quantum optics and lasers

Particle physics and field theory

Dates

Issue 09 (September 2006)

Received 4 August 2006, accepted for publication 7 September 2006

Published 21 September 2006



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