Investigation of cosmic-ray muon induced processes by the MIREDO facility
The MIREDO (Muon Induced Rare Event Dynamic Observatory) spectrometer system is primarily developed for the study of cosmic muon induced processes in different materials. Exploration of such interactions can be important for ultra-low background experiments. The system is based on the 100% relative efficiency ultra-low-background HPGe spectrometer. With the addition of two plastic scintillators and a fast-slow coincidence circuit, the coincidence events between the plastic detectors and the HPGe spectrometer have been investigated. First results derived for a CaO powder sample, placed in a Marinelli beaker, are presented and discussed.
Abstract A crystal field (CF) of axial symmetry is incorporated in the resonance model of Schotte and Schotte for magnetic multiplets of angular momentum j . The free energy for j = 5 2 and arbitrary level schemes is explicity evaluated and the competition between CF-splitting and Kondo effect in the susceptibility tensor is discussed.