Fluorescence Efficiency and Visible Re-emission Spectrum of Tetraphenyl Butadiene Films at Extreme Ultraviolet Wavelengths

Understand

A large number of current and future experiments in neutrino and dark matter detection use the scintillation light from noble elements as a mechanism for measuring energy deposition.

• The scintillation light from these elements is produced in the extreme ultraviolet (EUV) range, from 60 - 200 nm.
• Currently, the most practical technique for observing light at these wavelengths is to surround the scintillation volume with a thin film of Tetraphenyl Butadiene (TPB) to act as a fluor.
• The TPB film absorbs EUV photons and reemits visible photons, detectable with a variety of commercial photosensors.