Are there nuclear structure effects on the isoscalar giant monopole resonance near A=90?*

The excitation energy of the isoscalar giant monopole resonance (ISGMR) exhibits, in general, a very smooth behavior (E$_{x}\sim A^{1/3}$) over the periodic Table. In recent work\footnote{D. H. Youngblood \emph{et al.}, Phys. Rev. C \textbf{88}, 021301 (2013)} the Texas A\&M group has reported that ISGMR energies for $^{92}$Zr and $^{92}$Mo are appreciably higher than that for $^{90}$Zr, suggesting significant nuclear structure effects on ISGMR and, hence, on the nuclear compressibility. We have measured inelastic scattering of 385-MeV a particles on $^{90, 92}$Zr, $^{92}$Mo at extremely forward angles, including 0$^{\circ}$, using the ``Grand Raiden'' spectrometer at RCNP, Japan. Results of detailed multipole decomposition analyses to extract the ISGMR strength distributions in the three nuclei will be presented.