A Study of the Fluorescence Response of Tetraphenyl-butadiene

Details A Study of the Fluorescence Response of Tetraphenyl-butadiene A Study of the Fluorescence Response of Tetraphenyl-butadiene

2010-01-24

arxiv.org/abs/1001.4214v1

Physics

Instrumentation and Detectors

Scientific paper

Tetraphenyl-butadiene (TPB) is a widely used fluorescent wavelength-shifter. A common application is in liquid-argon-based particle detectors, where scintillation light is produced in the UV at 128 nm. In liquid argon experiments, TPB is often employed to shift the scintillation light to the visible range in order to allow detection via standard photomultiplier tubes. This paper presents studies on the stability of TPB with time under exposure to light. We also examine batch-to-batch variations. We compare scintillation-grade TPB to 99% pure TPB response. In the 99% pure samples, we report a yellowing effect, and full degradation of the TPB emission-peak, upon extended exposure to light.

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