The Nuclear Shell Model towards the Drip Lines

Brown, B. A.

doi:10.3390/physics4020035

Cited by 15 publications

(1 citation statement)

References 116 publications

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“…In the present work, full 1ÿω SM calculations of the dipole polarizability for the first excitation in selected p-and sd-shell nuclei have been performed with the OXBASH code [94] using the WBP [95] and FSU [96][97][98] Hamiltonians and the spsdpf model space. Shell model calculations for A 12 nuclides arise from the WBP interaction whereas for A 17 we quote results using the FSU interaction.…”

Section: Shell-model Calculationsmentioning

confidence: 99%

Electric dipole polarizability of low-lying excited states in atomic nuclei

Orce,

Ngwetsheni

2024

J. Phys. G: Nucl. Part. Phys.

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New equations for the electric dipole polarizability αE1 of low-lying excited states in atomic nuclei — and the related (–2) moment of the total photo-absorption cross section, σ–2 — are inferred in terms of electric dipole and quadrupole matrix elements. These equations are valid for arbitrary angular momenta of the initial/ground and final/excited states and have been exploited in fully converged 1h̄ω shell-model calculations of selected p- and sd-shellnuclei that consider configuration mixing; advancing previous knowledge from 17O to 36Ar, where thousands of electric dipole matrix elements are computed from isovector excitations which include the giant dipole resonance region. Our results are in reasonable agreement with previous shell-model calculations and follow — except for 6,7 Li and 17,18 O — Migdal’s global trend provided by the combination of the hydrodynamic model and second-order non-degenerate perturbation theory. Discrepancies in 6,7Li and 17O arise as a result of the presence of α-cluster configurations in odd-mass nuclei, whereas the disagreement in 18O comes from the mixing of intruder states, which is lacking in the shell-model interactions. More advanced ab initio calculations of the dipole polarizability for low-lying excited states covering all the isovector states within the giant dipole resonance region are missing and could be very valuable to benchmark the results presented here and shed further light on how atomic nuclei polarize away from the ground state

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Section: Shell-model Calculationsmentioning

confidence: 99%

Electric dipole polarizability of low-lying excited states in atomic nuclei

Orce,

Ngwetsheni

2024

J. Phys. G: Nucl. Part. Phys.

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A Survey of the Battlefield for the Origin of Life

2024

Origin of Life via Archaea

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Recent progress in two-proton radioactivity

et al. 2022

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During the last few decades, rare isotope beam facilities have provided unique data for studying the properties of nuclides located far from the beta-stability line. Such nuclei are often accompanied by exotic structures and radioactive modes, which represent the forefront of nuclear research. Among them, two-proton (2p) radioactivity is a rare decay mode found in a few highly proton-rich isotopes. The 2p decay lifetimes and properties of emitted protons hold invaluable information regarding the nuclear structures in the presence of a low-lying proton continuum; as such, they have attracted considerable research attention. In this review, we present some of the recent experimental and theoretical progress regarding the 2p decay, including technical innovations for measuring nucleonnucleon correlations and developments in the models that connect their structural aspects with their decay properties. This impressive progress should play a significant role in elucidating the mechanism of these exotic decays, probing the corresponding components inside nuclei, and providing deep insights into the open quantum nature of dripline systems.

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The Nuclear Shell Model towards the Drip Lines

Cited by 15 publications

References 116 publications

Electric dipole polarizability of low-lying excited states in atomic nuclei

Electric dipole polarizability of low-lying excited states in atomic nuclei

A Survey of the Battlefield for the Origin of Life

Recent progress in two-proton radioactivity

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