Super-deformation and shape isomerism: Mapping the isthmus

Krieger, S. J.; Bonche, P.; Weiss, M. S.; Meyer, J.; Flocard, H.; Heenen, Paul‐Henri

doi:10.1016/0375-9474(92)90395-z

Cited by 59 publications

(13 citation statements)

References 18 publications

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“…[244]) extensive theoretical efforts that now span a broad range of the periodic table, have been made in the last two decades, aimed at understanding both high-spin decays and fission. These have included non-fissile regions, typically using Hartree-Fock BCS or Strutinsky approaches, with and without full explorations over the (β, γ) deformation plane [245,246,247,248] with a number focussing on important details of the generator-coordinate methods [249,250,251]. There are numerous studies of fissile nuclei (for example Refs.…”

Section: Deformed Nuclei With a > 190: Extreme Shapes Fission And K mentioning

confidence: 99%

Review of metastable states in heavy nuclei

2016

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Abstract.The structure of nuclear isomeric states is reviewed in the context of their role in contemporary nuclear physics research. Emphasis is given to high-spin isomers in heavy nuclei, with A 150. The possibility to exploit isomers to study some of the most exotic nuclei is a recurring theme. In spherical nuclei, the role of octupole collectivity is discussed in detail, while in deformed nuclei the limitations of the K quantum number are addressed. Isomer targets and isomer beams are considered, along with applications related to energy storage, astrophysics, medicine, and experimental advances.

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Section: Deformed Nuclei With a > 190: Extreme Shapes Fission And K mentioning

confidence: 99%

Review of metastable states in heavy nuclei

2016

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“…There are several non-relativistic theoretical predictions for the excitation energy relative to the ground state. Such as Hartree-Fock calculations with density dependent Skyrme [4] or Gogny interactions [5] as well as calculations using the Strutinsky method built on a Woods-Saxon average potential [6]. In this letter we report and discuss the predictions of the RMF theory for the excitation energies relative to the ground state of the SD bands of 194 Hg and 194 Pb.…”

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confidence: 99%

Excitation energy of superdeformed bands in Relativistic Mean Field theory

Lalazissis¹,

Ring²

1998

Physics Letters B

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Constrained Relativistic Mean Field (RMF) calculations have been carried out to estimate excitation energies relative to the ground state for superdeformed bands in the mass regions A ∼ 190 and A ∼ 150. It is shown that RMF theory is able to successfully reproduce the recently measured superdeformed minima in Hg and Pb nuclei.Superdeformation has become the recent years one of the most interesting topics of nuclear structure studies. After the well known area in the vicinity of the mass number A ∼ 150 a second region with A ∼ 190 has been discovered, where an impressive number of results has been obtained. However, despite the rather large amount of experimental information on superdeformed bands, there are still a number of very interesting properties, which have not yet been measured. A characteristic example is the excitation energy between ground and superdeformed bands. The excitation energy and the well depth of the superdeformed minimum are amongst the most important factors which affect the decay of the superdeformed bands to the ground state.Very recently discrete γ rays directly connecting states of a superdeformed band in 194 Hg to the yrast states have been discovered [1]. This has made it possible to determine accurately the excitation energy of the levels of the superdeformed band above the yrast line. Extrapolating to zero angular momentum the superdeformed minimum was found to be 6.017 MeV above the ground state. Similar measurements at about the same time have also been reported for the superdeformed band of 194 Pb nucleus [2]. The excitation energy between the SD band and the ground state was estimated to be 4.471(6) MeV.

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“…The existence of superdeformed states and their fundamental properties has been predicted within the different theoretical approaches. These approaches include the Strutinsky method with a Woods-Saxon potential [73], the Hartree-Fock-Bogoliubov (HFB) model with different Skyrme forces [74][75][76], with a Gogny force [77], the cluster model [78], and the relativistic mean-field (RMF) theory [79][80][81]. These models have predicted exactly the excitation energies and well depth of SD states.…”

Section: Introductionmentioning

confidence: 99%

Triple-shape Coexistence and Superdeformation in Pb Isotopes

Naz¹,

Ahmad²,

Abusara³

2018

Acta Phys. Pol. B

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Triple-shape coexistence and superdeformation in Pb isotopes with neutron numbers N = 96-138 is studied. The constrained calculations are performed within the Relativistic Hartree-Bogoliubov (RHB) model using DD-ME2, DD-PC1, and NL3* force parameters, and pairing interaction separable in momentum space. Triple-shape coexistence (spherical, prolate and oblate) manifests themselves in a clear manner in 184−190 Pb nuclei with axial RHB calculations. Triaxial RHB calculations further confirm the findings. Superdeformed minimum is observed for 188−220 Pb isotopes, and the corresponding excitation energy, deformation and depth of well are comparable within different force parameters used. The behaviour with neutron number of the superdeformed excitation energy, two-neutron separation energy in the ground state and superdeformed minimum, and its differential are fairly reproducing the trend of the available experimental data. The present numerical results are compared with Macro-microscopic Finite Range Droplet Model (FRDM) and Hartree-Fock-Bogoliubov (HFB) model based on the interaction Gogny-D1S force. Overall, a fairly satisfactory agreement is found within the different force parameters and the calculated and experimental results.

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Super-deformation and shape isomerism: Mapping the isthmus

Cited by 59 publications

References 18 publications

Review of metastable states in heavy nuclei

Review of metastable states in heavy nuclei

Excitation energy of superdeformed bands in Relativistic Mean Field theory

Triple-shape Coexistence and Superdeformation in Pb Isotopes

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