The systematics of the giant monopole resonance in even-mass Sn isotopes have been studied in the framework of the quasiparticle random-phase approximation. The effect of the inclusion of pairing correlations on the properties of the giant monopole and giant quadrupole resonances in superfluid Sn nuclei has been evaluated. A shift in the monopole energies of these nuclei by about 100–150 keV has been observed. It is shown that the shift in the energy of the breathing mode of finite superfluid nuclei influences the extraction of the nuclear matter compressibility from empirical data only minimally.

• Received 19 November 1990

DOI:https://doi.org/10.1103/PhysRevC.43.2622