Effect of ground-state deformation on the Isoscalar Giant Monopole Resonance and the first observation of overtones of the Isoscalar Giant Quadrupole Resonance in rare-earth Nd isotopes

Abstract

The strength distributions of the Isoscalar Giant Monopole Resonance (ISGMR) and Isoscalar Giant Quadrupole Resonance (ISGQR) in 142,146-150Nd have been determined via inelastic alpha-particle scattering with the Grand Raiden (GR) Spectrometer at the Research Center for Nuclear Physics (RCNP), Japan. In the deformed nuclei 146-150Nd, the ISGMR strength distributions exhibit a splitting into two components, while the nearly spherical nucleus 142Nd displays a single peak in the ISGMR strength distribution. A noteworthy achievement in this study is the first-time detection of overtones in the Isoscalar Giant Quadrupole Resonance (ISGQR) strength distributions within Nd isotopes at an excitation energy around 25 MeV obtained through Multipole Decomposition Analysis (MDA).

arXiv commentAccepted for publication in Physics Letters B

References in corpus (8)

• The Compression-Mode Giant Resonances and Nuclear Incompressibility
• Giant Dipole Resonance Parameters of Ground-State Photoabsorption: Experimental Values with Uncertainties
• Shape evolution of giant resonances in Nd and Sm isotopes
• Overtones of Isoscalar Giant Resonances in medium-heavy and heavy nuclei
• Isoscalar Giant Monopole, Dipole, and Quadrupole Resonances in ${}^{90,92}$Zr and ${}^{92}$Mo
• Excitation of Giant Monopole Resonance in ${}^{208}$Pb and ${}^{116}$Sn Using Inelastic Deuteron Scattering
• Deformation-induced splitting of isoscalar E0 giant resonance: Skyrme random-phase-approximation analysis
• Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A=90