Speaker
Description
The flavor transition of solar neutrinos is governed by the vacuum MNS mixing parameters and MSW matter effect, however, the transition from matter- to vacuum-dominated energy region, i.e. the upturn, has not been experimentally observed. It left open questions for light sterile neutrinos or non-standard-model interactions. The solar neutrino spectrum predicted by the solar model also bears large experimental uncertainties. Geo-science achieved by neutrino observatories has just started, more data is urged. In this talk, I will introduce our recent experimental study of LiCl and GaCl liquid scintillators. Lithium-7 has shown a high-cross-section low-threshold feature for electron-neutrino detection and energy measurement through charged current interaction. Gallium-71 has shown an interesting delayed-coincidence feature for electron-neutrino detection and energy measurement. Chloride-35 and Lithium-6 have shown that detection of electron-antineutrino with delayed-coincidence technique is possible. We investigated the physical property of LiCl and GaCl on solubility, U, Th, K removal, natural abundance, and attenuation length. We have tried to produce a water-based liquid scintillator including LiCl and GaCl. We find that LiCl aqueous solution is good media for MeV electron- neutrino and antineutrino spectrometer and rather efficient in measuring the upturn, solar sterile neutrinos, and geoneutrinos. Some features are unique and cannot be achieved by a traditional water-Cherenkov or liquid scintillator detector, and some features can cause a compact size for a detector.
| First author | Zhe Wang |
|---|---|
| wangzhe-hep@tsinghua.edu.cn | |
| Collaboration / Activity | None |
