2022/03/03 by Wenhui Shao, Shao, Wenhui, Weiran Xu +17 · 1 citation
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Neutrino Physics Research #Quantum, superfluid, helium dynamics
paper · pdf · doi:10.48550/arxiv.2203.01860
openalex publication_date 2022/03/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Lithium chloride water solution is a good option for solar neutrino detection. The νe charged-current (CC) interaction cross-section on \rm7Li is evaluated with new B(GT) experimental measurements. The total CC interaction cross-section weighted by the solar 8B electron neutrino spectrum is 3.759×10-42 \rmcm2, which is about 60 times that of the neutrino-electron elastic scattering process. The final state effective kinetic energy after the CC interaction on \rm7Li directly reflects the neutrino energy, which stands in sharp contrast to the plateau structure of recoil electrons of the elastic scattering. With the high solubility of LiCl of 74.5 g/100 g water at 10^∘C and the high natural abundance of 92.41%, the molarity of \rm7Li in water can reach 11 mol/L for safe operation at room temperature. The CC event rate of νe on \rm7Li in the LiCl water solution is comparable to that of neutrino-electron elastic scattering. In addition, the νe CC interaction with the contained \rm37Cl also contributes a few percent of the total CC event rate. The contained \rm35Cl and \rm6Li also make a delay-coincidence detection for electron antineutrinos possible. The recrystallization method is found to be applicable for LiCl sample purification. The measured attenuation length of 11±1 m at 430 nm shows that the LiCl solution is practicable for a 10-m diameter detector for solar neutrino detection. Clear advantages are found in studying the upturn effect of solar neutrino oscillation, light sterile neutrinos, and Earth matter effect. The sensitivities in discovering solar neutrino upturn and light sterile neutrinos are shown.