Spin-Isospin Excitations and Muon Capture by Nuclei
  By analyzing the energy-weighted moments of the strength function calculated in RPA and beyond it is shown that the explanation of the effect of missing strength of Gamow-Teller transitions requires that residual interaction produce high-excited $1^{+}$ particle-hole collective states. The example of this interaction is presented. The manifestations of spin-isospin nuclear response in nuclear muon capture are discussed. 
V. A. Kuz'min (JINR, Dubna, Russia), T. V. Tetereva (SINP of MSU,   Moscow, Russia)