Measurements of Rayleigh Ratios in Linear Alkylbenzene

TL;DR

This study measures the Rayleigh scattering ratios and scattering lengths of linear alkylbenzene at specific wavelengths, providing essential optical data for neutrino detector applications.

Contribution

The paper presents direct measurements of Rayleigh ratios and scattering lengths of linear alkylbenzene at 405 nm and 432 nm, which were previously not well characterized.

Findings

Rayleigh ratio at 405 nm: (4.52±0.28)×10⁻⁶ m⁻¹·sr⁻¹

Rayleigh ratio at 432 nm: (3.82±0.24)×10⁻⁶ m⁻¹·sr⁻¹

Rayleigh scattering length at 405 nm: 22.9±0.3(stat)±1.7(sys) m

Abstract

In present work an experiment has been designed to measure the Rayleigh ratio directly at $405$ nm and $432$ nm for linear alkylbenzene which is a common solvent used in liquid scintillator detectors of neutrino experiments. The perpendicularly polarized Rayleigh ratio is determined to be $(4.52\pm 0.28)\times 10^{-6}$ m$^{-1}\cdot$ sr$^{-1}$ at $405$ nm and $(3.82\pm 0.24)\times 10^{-6}$ m$^{-1}\cdot$ sr$^{-1}$ at $432$ nm, and the corresponding Rayleigh scattering length is $L_{Ray} = 22.9\pm 0.3(\mathrm{stat.})\pm 1.7(\mathrm{sys.})$ m at $405$ nm and $L_{Ray}= 27.0\pm 0.9(\mathrm{stat.})\pm 1.8(\mathrm{sys.})$ m at $432$ nm.