Isoscalar response of $^{68}$Ni to $\alpha$-particle and deuteron probes

Abstract : Isoscalar giant resonances have been measured in the unstable Ni68 nucleus using inelastic alpha and deuteron scattering at 50A MeV in inverse kinematics with the active target MAYA at GANIL. Using alpha scattering, the extracted isoscalar giant monopole resonance (ISGMR) centroid was determined to be 21.1±1.9 MeV and the isoscalar giant quadrupole resonance (ISGQR) to be 15.9±1.3 MeV. Indications for soft isoscalar monopole and dipole modes are provided. Results obtained with both (α,α′) and (d,d′) probes are compatible. The evolution of isoscalar giant resonances along the Ni isotopic chain from Ni56 to Ni68 is discussed.
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M. Vandebrouck, J. Gibelin, E. Khan, N.L. Achouri, H. Baba, et al.. Isoscalar response of $^{68}$Ni to $\alpha$-particle and deuteron probes. Physical Review C, American Physical Society, 2015, 92, pp.024316. ⟨10.1103/PhysRevC.92.024316⟩. ⟨in2p3-01179429⟩

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