Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 13: Detectors 2 (scintillators, other)

T 13.3: Talk

Monday, March 4, 2024, 16:30–16:45, Geb. 30.23: 2/17

Spectral Measurements of Liquid Scintillators for a LiquidO Detector System — •Anatol Tunc, Alfons Weber, and Stefan Schoppmann — Johannes Gutenberg-Universität Mainz

LiquidO denotes an international consortium focusing on a new approach for liquid scintillation detectors (LSDs). In contrast to conventional methods striving for maximum transparency with light readout outside of the detection volume, the LiquidO ansatz utilises a deliberate opacity of the scintillator medium by means of reducing the scattering length via wax loading. The effective confinement of scintillation light around interaction vertices results in a particle specific topology of so-called 'light balls'. Local light readout by a dense array of wavelength shifting fibres running through the detector medium thus enables unprecedented spatial resolution and particle identification/discrimination for LSDs in the MeV range. This talk presents research efforts with a variety of scintillator solvents, wavelength shifters and combinations thereof considering employment in a LiquidO detector system. The research includes emission and absorption spectra, light yield measurements to estimate the response to monoenergetic gammas as well as the development of a small scale LiquidO detector enabling local testing of scintillator performance.

Keywords: LiquidO; Liquid Scintillator; Scintillator Spectra; Scintillation Detector; Wavelength Shifter