Slow Fluors for Highly Effective Separation of Cherenkov Light in Liquid Scintillators
arXiv
Authors:
Steven D Biller, Edward J Leming, Josephine L Paton
Abstract:
The timing and spectral characteristics of four highly efficient, slow fluors
are presented for liquid scintillator solutions using linear alkylbenzene (LAB)
as the primary solvent. The mixtures exhibit high light yields, but with rise
times of several ns or more and decay times on the order of tens of ns.
Consequently, such liquid scintillator mixtures can be used for highly
effective separation of Cherenkov and scintillation components based on timing
in large scale liquid scintillation detectors. Such a separation, showing high
light yield and directional information, is demonstrated here on a bench-top
scale for electrons with energies extending below 1 MeV. This could have
significant consequences for the future development of such detectors for
measurements of solar neutrinos and neutrinoless double beta decay as well as
providing good directional information for elastic scattering events from
supernovae neutrinos and reactor anti-neutrinos, amongst others.
