Superheavy nuclei in a microscopic collective Hamiltonian approach: The impact of beyondmeanfield correlations on ground state and fission properties
Abstract
The effect of beyondmeanfield effects on the ground state and fission properties of superheavy nuclei has been investigated in a fivedimensional collective Hamiltonian based on covariant density functional theory. The inclusion of dynamical correlations reduces the impact of the $Z=120$ shell closure and induces substantial collectivity for the majority of the $Z=120$ nuclei which otherwise are spherical at the meanfield level (as seen in the calculations with the PCPK1 functional). As a result, they lead to a substantial convergence of the predictions of the functionals DDPC1 and PCPK1 which are different at the meanfield level. On the contrary, the predictions of these two functionals remain distinctly different for the $N=184$ nuclei even when dynamical correlations are included. These nuclei are mainly spherical (oblate) in the calculations with PCPK1 (DDPC1). Our calculations for the first time reveal significant impact of dynamical correlations on the heights of inner fission barriers of superheavy nuclei with soft potential energy surfaces, the minimum of which at the meanfield level is located at spherical shape. These correlations affect the fission barriers of the nuclei, which are deformed in the ground state at the meanfield level, to a lesser degree.
 Authors:

 Beihang Univ., Beijing (China)
 Mississippi State Univ., Mississippi State, MS (United States); Kyoto Univ. (Japan)
 Southwest Univ., Chongqing (China)
 Peking Univ., Beijing (China); Kyoto Univ. (Japan)
 Publication Date:
 Research Org.:
 Mississippi State Univ., Mississippi State, MS (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Nuclear Physics (NP); National Natural Science Foundation of China (NSFC)
 OSTI Identifier:
 1597101
 Alternate Identifier(s):
 OSTI ID: 1546230
 Grant/Contract Number:
 SC0013037; SC0009971
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review C
 Additional Journal Information:
 Journal Volume: 99; Journal Issue: 6; Journal ID: ISSN 24699985
 Publisher:
 American Physical Society (APS)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Shi, Z., Afanasjev, Anatoli V., Li, Z. P., and Meng, J. Superheavy nuclei in a microscopic collective Hamiltonian approach: The impact of beyondmeanfield correlations on ground state and fission properties. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.99.064316.
Shi, Z., Afanasjev, Anatoli V., Li, Z. P., & Meng, J. Superheavy nuclei in a microscopic collective Hamiltonian approach: The impact of beyondmeanfield correlations on ground state and fission properties. United States. https://doi.org/10.1103/PhysRevC.99.064316
Shi, Z., Afanasjev, Anatoli V., Li, Z. P., and Meng, J. Wed .
"Superheavy nuclei in a microscopic collective Hamiltonian approach: The impact of beyondmeanfield correlations on ground state and fission properties". United States. https://doi.org/10.1103/PhysRevC.99.064316. https://www.osti.gov/servlets/purl/1597101.
@article{osti_1597101,
title = {Superheavy nuclei in a microscopic collective Hamiltonian approach: The impact of beyondmeanfield correlations on ground state and fission properties},
author = {Shi, Z. and Afanasjev, Anatoli V. and Li, Z. P. and Meng, J.},
abstractNote = {The effect of beyondmeanfield effects on the ground state and fission properties of superheavy nuclei has been investigated in a fivedimensional collective Hamiltonian based on covariant density functional theory. The inclusion of dynamical correlations reduces the impact of the Z=120 shell closure and induces substantial collectivity for the majority of the Z=120 nuclei which otherwise are spherical at the meanfield level (as seen in the calculations with the PCPK1 functional). As a result, they lead to a substantial convergence of the predictions of the functionals DDPC1 and PCPK1 which are different at the meanfield level. On the contrary, the predictions of these two functionals remain distinctly different for the N=184 nuclei even when dynamical correlations are included. These nuclei are mainly spherical (oblate) in the calculations with PCPK1 (DDPC1). Our calculations for the first time reveal significant impact of dynamical correlations on the heights of inner fission barriers of superheavy nuclei with soft potential energy surfaces, the minimum of which at the meanfield level is located at spherical shape. These correlations affect the fission barriers of the nuclei, which are deformed in the ground state at the meanfield level, to a lesser degree.},
doi = {10.1103/PhysRevC.99.064316},
journal = {Physical Review C},
number = 6,
volume = 99,
place = {United States},
year = {2019},
month = {6}
}
Web of Science
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