Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5139921 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2017 | 6 Pages |
Abstract
Noble gases (Xe, Ar, Kr) are very attractive as detector media in Dark Matter search and neutrinoless double-beta decay experiments. However, the detection of their scintillation light (in the VUV spectral region) requires shifting the VUV light to visible light, where standard photosensors are more efficient. Tetraphenyl butadiene (TPB) is widely used as wavelength shifter, absorbing the VUV light and re-emitting in the blue region (~Â 430Â nm). TPB is an organic molecule that may degrade due to exposure to environmental agents and also to ultraviolet light. In this work, we present TPB ageing studies due to exposure to VUV light, aiming at quantifying the reduction of the absolute fluorescence yield of TPB coatings of several thicknesses (130Â nm, 260Â nm, 390Â nm, 1600Â nm), exposed to various doses of VUV light at 170Â nm (similar to the Xe scintillation). In our setup, the VUV light is produced from a vacuum monochromator coupled to a deuterium lamp. The VUV exposure in our setup is compared to the exposure obtained in the electroluminescent gaseous Xe TPC of the NEXT-100 experiment for neutrinoless double-beta decay search.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
N. Yahlali, J.M. Garcia, J. DÃaz, A. Soriano, L.M.P. Fernandes,