  Investigation of the interaction of muons with complex nuclei yields
important results on the properties of nuclei and on their electromagnetic
interaction with muons happening to be in the Coulomb field of the nucleus. The
muon serves as a unique instrument in studies of the charge distribution and of
other properties of nuclei. The following are processes which yield information
relevant to the properties of nuclei. This work is the first (and unique)
investigation of the dynamic E0 excitation of nucleus at muon - decay on the
K-orbit of muonic atom.This excitation mechanism permits one to get per se
nuclear monopole excitation. Study of nuclear excitation by the decay of the
bound muon is of independent interest - discovery of a new process and
validation of ideas about it in the future can provide a new complementary
method for studying nuclear monopole states.
