An experimental view on shape coexistence in nuclei

Garrett, P. E.; Zielińska, M.; Clément, E.

doi:10.1016/j.ppnp.2021.103931

Cited by 53 publications

(28 citation statements)

References 554 publications

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“…Initially proposed in 1956 by Morinaga [1] in 16 O, it has later been observed in many odd [2] and even-even [3,4] atomic nuclei. Efforts in this direction have been recently intensified, since many more experimental examples become available [5] through the advent of radioactive ion beam facilities.…”

Section: Introductionmentioning

confidence: 99%

Islands of shape coexistence from single-particle spectra in covariant density functional theory

et al. 2022

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Shape coexistence in even-even nuclei is observed when the ground state band of a nucleus is accompanied by another K=0 band at similar energy but with radically different structure. We attempt to predict regions of shape coexistence throughout the nuclear chart using the parameter-free proxy-SU(3) symmetry and standard covariant density functional theory. Within the proxy-SU(3) symmetry the interplay of shell model magic numbers, formed by the spin-orbit interaction, and the 3-dimensional isotropic harmonic oscillator magic numbers, leads to the prediction of specific horizontal and vertical stripes on the nuclear chart in which shape coexistence should be possible. Within covariant density functional theory, specific islands on the nuclear chart are found, in which particle-hole excitations leading to shape coexistence are observed. The role played by particle-hole excitations across magic numbers as well as the collapse of magic numbers as deformation sets in is clarified.

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Section: Introductionmentioning

confidence: 99%

Islands of shape coexistence from single-particle spectra in covariant density functional theory

et al. 2022

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“…The series of isotopes close to the Z=50 magic number are also known to provide textbook examples of shape coexistence [1,2,3]. Results for the Te (Z=52) isotopes, lying close to the Z=50 magic number, are shown in Fig.…”

Section: Neutron Induced Shape Coexistencementioning

confidence: 97%

“…The series of isotopes close to the Z=82 magic number are known to provide textbook examples of shape coexistence [1,2,3]. This is the most robust region of shape coexistence, thus we start from it and move to lower masses as we go on.…”

Section: Neutron Induced Shape Coexistencementioning

confidence: 99%

“…Shape coexistence [1,2,3], appearing in a nucleus when the ground state band and another band lie very close in energy but possess radically different structures, for example one of them being near-spherical and the other deformed, is a field of intense current experimental investigations [3], since its occurrence appears to be connected to subtle properties of the nucleon-nucleon interaction [4]. It is in general believed that shape coexistence can be interpreted microscopically in terms of particle-hole excitations [1,2] occurring across major shell and subshell closures [5], like the ones occurring at Z = 82, 50, 40.…”

Section: Introductionmentioning

confidence: 99%

“…It is in general believed that shape coexistence can be interpreted microscopically in terms of particle-hole excitations [1,2] occurring across major shell and subshell closures [5], like the ones occurring at Z = 82, 50, 40. However, the occurrence of shape coexistence in the region of the N = 90 isotones, which are well-known examples of manifestation [6] of the X(5) critical point symmetry [7], related to the shape/phase transition [8] between spherical and deformed nuclei, remains an open question ( [3], p. 104).…”

Section: Introductionmentioning

confidence: 99%

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Microscopic origin of shape coexistence in the N=90, Z=64 region

Bonatsos,

Karakatsanis,

Martinou

et al. 2022

Preprint

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A microscopic explanation of the nature of shape coexistence in the N=90, Z=64 region is suggested, based on calculations of single particle energies through standard covariant density functional theory. It is suggested that shape coexistence in the N=90 region is caused by the protons, which create neutron particle-hole (p-h) excitations across the N=112 3-dimensional isotropic harmonic oscillator (3D-HO) magic number, signaling the start of the occupation of the 1i13/2 intruder orbital, which triggers stronger proton-neutron interaction, causing the onset of the deformation and resulting in the shape/phase transition from spherical to deformed nuclei described by the X(5) critical point symmetry. A similar effect is seen in the N=60, Z=40 region, in which p-h excitations across the N=70 3D-HO magic number occur, signaling the start of the occupation of the 1h11/2 intruder orbital.

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Nuclear Charge Radii

Nörtershäuser¹,

Moore²

2022

Handbook of Nuclear Physics

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An experimental view on shape coexistence in nuclei

Cited by 53 publications

References 554 publications

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Islands of shape coexistence from single-particle spectra in covariant density functional theory

Microscopic origin of shape coexistence in the N=90, Z=64 region

Nuclear Charge Radii

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