The pygmy dipole resonance in neutron-rich nuclei

Study of static and dynamic properties of even-even 14–24O and 38–54Ca in the frame of Random Phase Approximation (RPA) method with different Skyrme parameterizations

“…The results were independent of the parameter sets TM2, NL3, and NL-SH used. Similarly, new large shell gaps were predicted Z=6, 16 and/or 14 for protons, Hung et al (2016) [18] studied the electric dipole strength of atomic nuclei within a microscopic collective model. The latter used the HF method with effective nucleon-nucleon interactions of the Skyrme types plus the RPA.…”

“…In this section, we present strength function calculations using the RPA method for nucleons with transitions in the case of the quadrupole and octupole modes. In addition, the energy-weighted sum rules, constrained (E CON ), [18][19][20] O and the quadruple mode (E2) in 14,16,22,24 O isotopes, obtained using SLy4 Skyrme parameterization.…”

“…Higher modes of the excited states, energy-weighted sum rule, the centroid, constrained, and scaling energies of the resonances have been studied and illustrated together with available experimental data for comparison. For the low-lying excited states, the energy transition densities for J π = 2 + and J π = 3 − are reproduced well in [18][19][20][21][22][23][24] O and 46-54 Ca isotopes. The neutron single particle states as a function of neutron number have been also presented.…”

“…The latter used the HF method with effective nucleon-nucleon interactions of the Skyrme types plus the RPA. The results of the calculations were obtained for various even-even nuclei such as [16][17][18][19][20][21][22][23][24][25][26][27][28] Pb, calculated within the fully self-consistent HF based RPA theory, using 33 different Skyrme parameterizations.…”

“…In the present work, we intend to concentrate on using the RPA method to studying the nuclear structure properties of some neutron rich nuclei in the nuclear landscape such as 24 O, 52 Ca, and 54 Ca, and their even-even isotopes such as [14][15][16][17][18][19][20][21][22] O, and 38-50 Ca. In particular, we will investigate the nuclear properties associated with Skyrme interaction and movement of transition, namely, the nuclear binding energies per nucleons, with root mean square (rms) radii.…”