Structure and direct decay of Giant Monopole Resonances

Abstract

We study structure and direct decay of the Giant Monopole Resonance (GMR) at the RPA level using the Time-Dependent Energy Density Functional method in the linear response regime in a few doubly-magic nuclei. A proper treatment of the continuum, through the use of large coordinate space, allows for a separation between the nucleus and its emitted nucleons. The microscopic structure of the GMR is investigated with the decomposition of the strength function into individual single-particles quantum numbers. A similar microscopic decomposition of the spectra of emitted nucleons by direct decay of the GMR is performed. In this harmonic picture of giant resonance, shifting every contribution by the initial single-particle energy allows to reconstruct the GMR strength function. The RPA residual interaction couples bound 1-particle 1-hole states to unbound ones, allowing for the total decay of the GMR. In this article, we then intend to get an understanding of the direct decay mechanism from coherent one-particle-one-hole superpositions, while neglecting more complex configurations. Time-dependent beyond mean-field approaches should be use, in the future, to extend this method.

11 pages, 10 figures. Major revisions including new formal development, new calculations and figures, comparison to experimental data and added references and discussions

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Cited by in corpus (17)

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• Interplay between quantum shells and orientation in quasi-fission
• Microscopic study of ${}^{16}$O+${}^{16}$O fusion
• Microscopic approach to coupled-channels effects on fusion
• Shape evolution and collective dynamics of quasifission in TDHF
• The Role of Tensor Force in Heavy-Ion Fusion Dynamics
• Transport properties of isospin asymmetric nuclear matter using TDHF
• Dynamical effects in fusion with exotic nuclei
• Microscopic study of ${}^{40}$Ca+${}^{58,64}$Ni fusion reactions
• Nuclear Quantum Many-Body Dynamics: From Collective Vibrations to Heavy-Ion Collisions (2nd edition)
• Imaginary Time Mean-Field Method for Collective Tunneling
• Pre-equilibrium Neutron Emission in Fission or Fragmentation
• Superfluid fission dynamics with microscopic approaches
• Computing nuclear response functions with time-dependent coupled-cluster theory
• Microscopic study of the effect of intrinsic degrees of freedom on fusion
• Probing quantum many-body dynamics in nuclear systems
• Time-dependent Hartree-Fock Study of Octupole Vibrations in doubly magic nuclei