At the end of January, two members of the Queen’s University team, Philippe and Marie, went to TUNL (Triangle University National Laboratory in North Carolina) to estimate the quenching factor of the gas mixture used in the experiment.
Duke University, Durham, NC
Light Dark Matter and coherent neutrino scattering (CEνNS) detection relies on the interaction with nuclei from the gas mixture, producing nuclear recoils. However, the energy calibration of detectors is done using gammas sources, producing electronic recoils. An electronic recoil and a nuclear recoil of the same energy interact differently in the medium, thus don’t appear to deposit the same amount of energy. Enter the quenching factor, a scale used to convert the nuclear recoil observed into its “real” energy. (more…)