LEM Group Publications: LEM related and other publications of the LEM Group Members. For a complete list of all Lab publications visit the LMU publications site. Publications related to the LEM instrument: visit the LEM publications site. Other publications of the LEM group: visit the Other LEM group publications site. Sidebar LMU and Groups Laboratory for Muon Spin Spectroscopy (LMU) Low-Energy Muons Group Bulk-µSR Group SμS Facility Instruments Beamlines User Services User Office Provides all information about user research at PSI Large Research Facilities NUM Homepage PSI Division Research with Neutrons and Muons.