Scintillation of thin tetraphenyl butadiene films under alpha particle excitation

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 und...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2011-04, Vol.635 (1), p.127-130
Main Authors: Pollmann, Tina, Boulay, Mark, Kuźniak, Marcin
Format: Article
Language:English
Subjects:
Alpha particles
Alpha rays
Alpha scintillation
Butadiene
Dark matter
Deap-1
Detectors
Excitation
Scintillation
Searching
Tetraphenyl butadiene
Thin films
TPB
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Summary: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 and 275 ± 10 ns .
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2011.01.045