Isolation of the Giant Quadrupole Resonance inNi58via Deuteron Inelastic Scattering

Abstract

An investigation of the reaction ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}(d, d^{\prime })$ at $E_d=46\mathrm{} \mathrm{and} 70$ MeV has demonstrated significant advantages in studying isoscalar giant resonances with deuterons compared with other projectiles. The differential cross section at 70 MeV for the resonance at $E_x\approx 63A^{-\frac{1}{3}}$ MeV provides strong evidence for an $E2\mathrm{}$ interpretation. A comparison of measurements in ${}_{}{}^{58}{}_{}{}^{}\mathrm{Ni}(d, d^{\prime })$ and ($p, p^{\prime }$) provides evidence for excitation of the giant dipole resonance by protons.