Giant dipole resonance in absorption and emission of γ rays by medium and heavy nuclei

Fine Structure of β-Decay Strength Function

“…Oscillations with τ = 0 correspond to oscillation of the isoscalar (total) density. Oscillations with τ = 1, μ τ = 0, I π = 1correspond to the oscillation of the ρ τ=1,0 component of the isovector density and describe oscillation of protons and neutrons moving in antiphase (oscillations of neutrons agaist protons), and deformation leads to splitting of the E1 -giant resonance (GDR) peak [8][9][10]. Oscillations with τ = 1, μ τ = ±1 describe β + /EC (oscillations of proton holes against neutrons) and β --decays (oscillations of protons against neutron holes), and the peaks in the strength functions for deformed nuclei should also be split [2,3].…”

“…By analogy with splitting of the peak of E1 giant resonance (GDR) [7,8] in deformed nuclei, the peaks in S β (E) are split into two components from the axial nuclear deformation [3]. In this work such splitting and its connection with anisotropy of the isovector spin-isospin oscillation in deformed nuclei are discussed.…”

Giant dipole resonance and shape evolution in Nd isotopes within TDHF method

“…GDRs in heavy deformed nuclei have been previously investigated by various microscopic methods such as time-dependent Skyrme-Hartree-Fock method [7,11], Separable Random-Phase-Approximation (SRPA) [8,12], Relativistic Quasiparticle Random Phase Approximation (RQRPA) [13] and Extended Quantum Molecular Dynamics (EQMD) [14]. The excitation of the GDRs in the experiment is induced by various ways, such as photoabsorption [4,15] inelastic scattering [5,16],γdecay [17].…”

Investigation of giant dipole resonance in heavy deformed nuclei with the EQMD model

“…Deformed nucleus provides an interesting testing ground since there is a strong interplay between the structure of the GDR and the ground-state deformation [9]. Many works have been done both theoretically [10][11][12][13][14][15][16][17] and experimentally [5,6,[18][19][20][21] to investigate the effects of deformation in GDRs in heavy deformed nuclei. Most of the studies of the GDRs in deformed nuclei have been focused on the dependence of the width at half max- * Email:Corresponding author.…”

“…Various microscopic methods have been employed to investigate the GDRs of deformed nuclei such as randomphase approximation approach [10-13, 22, 23], timedependent Skyrme-Hartree-Fock method [14,16], timedependent density functional theory [24] and phonon damping model [25]. The excitation of the GDRs in the experiment is induced by inelastic scattering [26][27][28], photoabsorption [18][19][20]29], γ-decay [30] and so on. However, few researches have been conducted about the GDRs in heavy deformed nuclei using a dynamical method.…”