Description of the asymmetric to symmetric fission transition in the neutron-deficient thorium isotopes: Role of the tensor force

Bernard, R.; Pillet, N.; Robledo, L. M.; Anguiano, M.

doi:10.1103/physrevc.101.044615

Cited by 17 publications

(7 citation statements)

References 85 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We therefore expect both symmetric and asymmetric fission modes to occur with similar probabilities. These results are in good agreement with theoretical predictions using other EDF (see, e.g., [57][58][59]), as well as with experimental observations indicating similar yields for both modes at low excitation energy [11,12]. Our goal is now to investigate quasi-fission modes in 50 Ca+ 176 Yb collisions which, in the case of fusion, would form the 226 Th compound nucleus.…”

supporting

confidence: 87%

Comparison of fission and quasi-fission modes

Simenel,

McGlynn,

Umar

et al. 2021

Preprint

View full text Add to dashboard Cite

Quantum shell effects are known to affect the formation of fragments in nuclear fission. Shell effects also affect quasi-fission reactions occurring in heavy-ion collisions. Systematic time-dependent Hartree-Fock simulations of 50 Ca+ 176 Yb collisions show that the mass equilibration between the fragments in quasi-fission is stopped when they reach similar properties to those in the asymmetric fission mode of the 226 Th compound nucleus. Similar shell effects are then expected to determine the final repartition of nucleons between the nascent fragments in both mechanisms. This observation opens the possibility to explore asymmetric fission modes of superheavy nuclei with quasi-fission reactions.

show abstract

supporting

confidence: 87%

Comparison of fission and quasi-fission modes

Simenel,

McGlynn,

Umar

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Details of the procedure can be found in Ref. [19]. Axial (z−axis), time reversal and simplex symmetries are preserved in this study.…”

Section: Constrained Hartree-fock-bogoliubov Calculationsmentioning

confidence: 99%

Hartree–Fock–Bogoliubov study of quantum shell effects on the path to fission in $$^{180}$$Hg, $$^{236}$$U and $$^{256}$$Fm

2023

Self Cite

View full text Add to dashboard Cite

Quantum shell effects stabilising fission fragments with various shapes have been invoked as a factor determining the distribution of nucleons between the fragments at scission. Shell effects also induce asymmetric shapes in the nucleus on its way to fission well before the final fragments are (pre)formed. These shell effects are studied in fission of $$^{180}$$ 180 Hg, $$^{236}$$ 236 U and $$^{256}$$ 256 Fm with constrained Hartree-Fock-Bogoliubov calculations using the D1S parametrisation of the Gogny interaction. Strutinsky shell energy correction and single-particle energy level density near the Fermi surface are computed. Several neutron and proton shell effects are identified as drivers towards asymmetric fission. Shell effects are also used to identify the preformation of the fragments in the later stage of fission.

show abstract

“…For example, higher-order gradient terms have been added to the Skyrme EDF (Carlsson et al, 2008;Davesne et al, 2013;Becker et al, 2017). The Gogny family of functionals have been extended to include additional density-dependence and tensor interactions (Chappert et al, 2015;Pillet and Hilaire, 2017;Bernard et al, 2020). One hopes that such extensions would augment the parameter space to be optimised for a better description of fission properties.…”

Section: Energy Density Functionalmentioning

confidence: 99%

Future of Nuclear Fission Theory

Bender,

Bernard,

Bertsch

et al. 2020

Preprint

View full text Add to dashboard Cite

There has been much recent interest in nuclear fission, due in part to a new appreciation of its relevance to astrophysics, stability of superheavy elements, and fundamental theory of neutrino interactions. At the same time, there have been important developments on a conceptual and computational level for the theory. The promising new theoretical avenues were the subject of a workshop held at the University of York in October 2019; this report summarises its findings and recommendations.

show abstract

Description of the asymmetric to symmetric fission transition in the neutron-deficient thorium isotopes: Role of the tensor force

Cited by 17 publications

References 85 publications

Comparison of fission and quasi-fission modes

Comparison of fission and quasi-fission modes

Hartree–Fock–Bogoliubov study of quantum shell effects on the path to fission in $$^{180}$$Hg, $$^{236}$$U and $$^{256}$$Fm

Future of Nuclear Fission Theory

Contact Info

Product

Resources

About