Abstract
We present electron scattering form factors for the ground states and several low energy quadrupole excitations of the nuclei $^{52}\mathrm{Cr}$, $^{110}\mathrm{Pd}$, $^{114}\mathrm{Cd}$, and $^{116}\mathrm{Sn}$. For $^{116}\mathrm{Sn}$ we also present the form factor for the lowest octupole excitation. From these data we derive ground state charge distribution parameters as well as $B(\mathrm{EL})$ values. We attempt to interpret the observed ${2}^{+}$ states as the one- and two-phonon states of an anharmonic vibrational model. Predictions are made for the electromagnetic decay branching ratios and excited state electric quadrupole moments.NUCLEAR REACTIONS $e+^{52}\mathrm{Cr}$, $^{110}\mathrm{Pd}$, $^{114}\mathrm{Cd}$, $^{116}\mathrm{Sn}$; $\ensuremath{\theta}=127.5\ifmmode^\circ\else\textdegree\fi{}$, $E=40,50,60,75,92,110$ MeV; ground state charge distribution parameters; anharmonic vibrator model fits to quadrupole excitation data.
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