ABSTRACT
This chapter describes that the muon catalysed fusion (µCF) phenomenon is a nuclear reaction at zero energy. The most fascinating features regarding µCF concern types of phenomena related to the interplay of nuclear phenomena and atomic phenomena related to the interplay of nuclear and electromagnetic interactions, respectively, and possible future applications to energy resources. In order to obtain microscopic information on the electron transfer in the macro-molecule, the use of muon spin relaxation method is potentially important. In order to understand the physics of the µCF, the following classification of the processes is relevant: nuclear-process fusion reaction in a muon molecule; intermediate-process muon sticking regeneration and electromagnetic; and atomic and molecular processes, muonic atom formation/intra-atomic cascade and slowing-down, and muon transfer among hydrogen isotopes. Under the name of muon life science, the use of muonic X-ray is suggested to investigate the biological functions of human body through its capability of non-destructive element analysis of the specific organ in human body.
