High energy component of giant octupole resonance in medium and heavy mass nuclei

IsoscalarE0−E3strength inSn116,Youngblood1, Lui2, Clark3 et al. 2004Phys. Rev. C

“…Our results for the HEOR are compared with three other studies [35][36][37] in Table V. For 116 Sn the energies are in agreement, and except for the 800 MeV proton study [36] which reported only 22% of the EWSR, each study found approximately 75% of the EWSR expected in the HEOR [3].…”

“…Bonin et al [38] also reported E3 strength centered ϳ23 MeV in 116 Sn with both 340 and 480 MeV ␣ scattering but identified less than 15% of the EWSR. The excitation energy we obtain for 144 Sm is lower than reported by Yamagata et al [37], however Yamagata et al do not report a strength or width for the HEOR in 144 Sm. The energies obtained for the HEOR in 208 Pb are in agreement, but the 800 MeV proton work identified only 20% of the EWSR.…”

Elasticity of nuclear medium as a principal macrodynamical promoter of electric pygmy dipole resonance

“…From identification of theoretically computed energy of spheroidal quadrupole vibrational state with experimental energy of giant E2 resonance, taken from [39], it follows µ ≃ 4 × 10 33 dyn cm −2 . The fact that predictions of the model fairly accurately match the data on E3 (from [40]) and M2 (from [41]) with no use of any adjustable constants, as one can see in Fig.7, lends strong support to elastodynamical macroscopic mechanism of excitation of isoscalar giant resonances. Also it seems appropriate to add that a similar line of argument has been utilized to extract the shear viscosity η of nuclear matter from systematic data on spread width of giant resonances and the work of Hasse [42] is among the first to point out that such procedure leads to η ≃ 3 · 10 11 dyn sec cm −2 (see, for detail, [2]).…”

Separable Skyrme interactions and quasiparticle RPA

“…The evolution of the B(E2)-values in the S isotopes demonstrates clearly the pairing effects. The experimental and calculated B(E2)-values in reduction of the E2 transition probability in 36 S. Some overestimate of the energies in 34,38 S indicates that there is room for two-phonon effects. The study of the influence of two-phonon configurations on properties of the low-lying states within our approach is in progress now.…”