A Spectrometric Approach to Measuring the Rayleigh Scattering Length for Liquid Scintillator Detectors
Good optical transparency is a fundamental requirement of liquid scintillator (LS) detectors. Characterizing the transparency of a liquid scintillator to its own emitted light is a key parameter to determine the overall sensitivity of a large-volume detector. The attenuation of light in an optical-p...
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| description | Good optical transparency is a fundamental requirement of liquid scintillator (LS) detectors. Characterizing the transparency of a liquid scintillator to its own emitted light is a key parameter to determine the overall sensitivity of a large-volume detector. The attenuation of light in an optical-pure LS is dominated by Rayleigh scattering, which poses an intrinsic limit to the transparency of LS. This work presents a spectrometric approach of measuring the wavelength-dependent scattering length of liquids by applying the Einstein-Smoluchowski theory to a measurement of scattered light intensity. The scattering lengths of linear alkyl benzene (LAB) and EJ309-base (Di-isopropylnaphthalene, DIN) were measured and are reported in the wavelength range of 410 to 520 nm. The spectral peak of scintillation light emitted by a nominal LS is around 430 nm at which the scattering length for LAB and EJ-309-base was determined to be 27.9 +/- 2.3 m and 6.1 +/- 0.6 m respectively. |
| doi_str_mv | 10.48550/arxiv.2008.08634 |
| format | Article |
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| subjects | Attenuation Benzene Detectors Light attenuation Luminous intensity Parameter sensitivity Physics - High Energy Physics - Experiment Physics - Instrumentation and Detectors Rayleigh scattering Scintillation counters Spectral emittance Spectrometry |
| title | A Spectrometric Approach to Measuring the Rayleigh Scattering Length for Liquid Scintillator Detectors |
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