Scintillation of thin tetraphenyl butadiene films under alpha particle excitation

Details Scintillation of thin tetraphenyl butadiene films under alpha particle excitation Scintillation of thin tetraphenyl butadiene films under alpha particle excitation

2010-11-03

arxiv.org/abs/1011.1012v1

Physics

Instrumentation and Detectors

paper submitted to Nuclear Physics A

Scientific paper

The alpha induced scintillation of the wavelength shifter 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) was studied to improve the understanding of possible surface alpha backgrounds in the DEAP dark matter search experiment. We found that vacuum deposited thin TPB films emit 882 +/-210 photons per MeV under alpha particle excitation. The scintillation pulse shape consists of a double exponential decay with lifetimes of 11 +/-5 ns and 275 +/-10ns.

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