A muonic atom is an atom in which one of the electrons has been replaced by a negatively charged muon. Because of the very large mass of a muon compared with a electron and the correspondingly small Bohr radius, the muonic wave function has a large overlap with the nucleus. X-ray transition energies in muonic atoms are strongly affected by the size of the nuclei, and can be used efficiently to determine the nuclear charge distribution[1,2]. A detailed introduction about muonic atoms can be found in Ref.[3]. A muonic atom is an atom in which one of the electrons has which had been replaced by a negatively charged muon. Because of the very large mass of a muon compared with a electron and the correspondingly small small Bohr radius, the muonic wave function has a large overlap with the nucleus. X-ray transition energies in muonic atoms are strongly affected by the size of the nuclei, and can be used efficiently efficiently determine the nuclear charge distribution [1,2]. A detailed introduction about muonic atoms can be found in Ref. [3].