Computational nuclear quantum many-body problem: The UNEDF project

Bogner, S. K.; Bulgac, Aurel; Carlson, J.; Engel, J.; Fann, George I.; Furnstahl, R. J.; Gandolfi, Stefano; Hagen, G.; Horoi, Mihai; Johnson, Calvin W.; Kortelainen, M. J.; Lusk, Ewing L.; Maris, Pieter; Nam, Hai Ah; Navrátil, Petr; Nazarewicz, W.; Ng, Esmond G.; Nobre, G. P. A.; Ormand, Erich; Papenbrock, T.; Pei, Junchen; Pieper, Steven C.; Quaglioni, Sofia; Roche, Kenneth J.; Sarich, Jason; Schunck, N.; Sosonkina, Masha; Terasaki, J.; Thompson, I. J.; Vary, James P.; Wild, Stefan M.

doi:10.1016/j.cpc.2013.05.020

Cited by 59 publications

(46 citation statements)

References 168 publications

(259 reference statements)

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“…One of the principal aims of recent large-scale collaborations in low-energy nuclear physics (e.g., the UNEDF and NUCLEI projects [72,73,74]) is to calculate reliable reaction cross sections for astrophysics, nuclear energy, and national security, for which extensions of standard phenomenology are insufficient. The interplay of structure and reactions is essential for a successful description of exotic nuclei as well.…”

Section: Ab-initio Reactions With Rg-evolved Forcesmentioning

confidence: 99%

New applications of renormalization group methods in nuclear physics

2013

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Abstract. We review recent developments in the use of renormalization group (RG) methods in low-energy nuclear physics. These advances include enhanced RG technology, particularly for three-nucleon forces, which greatly extends the reach and accuracy of microscopic calculations. We discuss new results for the nucleonic equation of state with applications to astrophysical systems such as neutron stars, new calculations of the structure and reactions of finite nuclei, and new explorations of correlations in nuclear systems.

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Section: Ab-initio Reactions With Rg-evolved Forcesmentioning

confidence: 99%

New applications of renormalization group methods in nuclear physics

2013

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“…wave functions (Kohn-Sham orbitals), the self-consistent Hartree-Fock-Bogoliubov (HFB) equations are derived. Nuclear EDFM has been successfully used to describe properties of ground states and selected collective states across the nuclear landscape [24,[43][44][45].…”

Section: Model a Edfm Implementationmentioning

confidence: 99%

Nucleon localization and fragment formation in nuclear fission

2016

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Background: An electron localization measure was originally introduced to characterize chemical bond structures in molecules. Recently, a nucleon localization based on Hartree-Fock densities has been introduced to investigate α-cluster structures in light nuclei. Compared to the local nucleonic densities, the nucleon localization function has been shown to be an excellent indicator of shell effects and cluster correlations.Purpose: Using the spatial nucleon localization measure, we investigate the emergence of fragments in fissioning heavy nuclei.Methods: To illustrate basic concepts of nucleon localization, we employ the self-consistent energy density functional method with a quantified energy density functional optimized for fission studies.Results: We study the particle densities and spatial nucleon localization distributions along the fission pathways of 264 Fm, 232 Th and 240 Pu. We demonstrate that the fission fragments are formed fairly early in the evolution, well before scission. We illustrate the usefulness of the localization measure by showing how the hyperdeformed state of 232 Th can be understood in terms of a quasimolecular state made of 132 Sn and 100 Zr fragments.Conclusions: Compared to nucleonic distributions, the nucleon localization function more effectively quantifies nucleonic clustering: its characteristic oscillating pattern, traced back to shell effects, is a clear fingerprint of cluster/fragment configurations. This is of particular interest for studies of fragment formation and fragment identification in fissioning nuclei.

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“…To construct the mean-field configurations I used the UNEDF0 energy density functional, which is one of the results of a large scale project UNEDF [31]. The functional is described in detail in [1] and here I will elaborate only on some of its distinctive features.…”

Section: The Unedf0 Energy Functionalmentioning

confidence: 99%