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Title: Nuclear Fission: from more phenomenology and adjusted parameters to more fundamental theory and increased predictive power

Abstract

Two major recent developments in theory and computational resources created the favorable conditions for achieving a microscopic description of fission dynamics in classically allowed regions of the collective potential energy surface, almost eighty years after its discovery in 1939 by Hahn and Strassmann [1]. The first major development was in theory, the extension of the Time-Dependent Density Functional Theory (TDDFT) [2–5] to superfluid fermion systems [6]. The second development was in computing, the emergence of powerful enough supercomputers capable of solving the complex systems of equations describing the time evolution in three dimensions without any restrictions of hundreds of strongly interacting nucleons. Thus the conditions have been created to renounce phenomenological models and incomplete microscopic treatments with uncontrollable approximations and/or assumptions in the description of the complex dynamics of fission. Even though the available nuclear energy density functionals (NEDFs) are phenomenological still, their accuracy is improving steadily and the prospects of being able to perform calculations of the nuclear fission dynamics and to predict many properties of the fission fragments, otherwise not possible to extract from experiments.

Authors:
 [1];  [1];  [2];  [3];  [4];  [5];  [6];  [6];  [6];  [6]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Warsaw Univ. of Technology (Poland); Univ. of Washington, Seattle, WA (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Washington, Seattle, WA (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  6. Australian National Univ., Canberra, ACT (Australia)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1544353
Grant/Contract Number:  
FG02-97ER41014; AC52-07NA27344; AC05-00OR22725; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 163; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Bulgac, Aurel, Jin, Shi, Magierski, Piotr, Roche, Kenneth, Schunck, Nicolas, Stetcu, Ionel, Simpson, E. C., Simenel, C., Cook, K. J., and Carter, I. P. Nuclear Fission: from more phenomenology and adjusted parameters to more fundamental theory and increased predictive power. United States: N. p., 2017. Web. doi:10.1051/epjconf/201716300007.
Bulgac, Aurel, Jin, Shi, Magierski, Piotr, Roche, Kenneth, Schunck, Nicolas, Stetcu, Ionel, Simpson, E. C., Simenel, C., Cook, K. J., & Carter, I. P. Nuclear Fission: from more phenomenology and adjusted parameters to more fundamental theory and increased predictive power. United States. doi:10.1051/epjconf/201716300007.
Bulgac, Aurel, Jin, Shi, Magierski, Piotr, Roche, Kenneth, Schunck, Nicolas, Stetcu, Ionel, Simpson, E. C., Simenel, C., Cook, K. J., and Carter, I. P. Wed . "Nuclear Fission: from more phenomenology and adjusted parameters to more fundamental theory and increased predictive power". United States. doi:10.1051/epjconf/201716300007. https://www.osti.gov/servlets/purl/1544353.
@article{osti_1544353,
title = {Nuclear Fission: from more phenomenology and adjusted parameters to more fundamental theory and increased predictive power},
author = {Bulgac, Aurel and Jin, Shi and Magierski, Piotr and Roche, Kenneth and Schunck, Nicolas and Stetcu, Ionel and Simpson, E. C. and Simenel, C. and Cook, K. J. and Carter, I. P.},
abstractNote = {Two major recent developments in theory and computational resources created the favorable conditions for achieving a microscopic description of fission dynamics in classically allowed regions of the collective potential energy surface, almost eighty years after its discovery in 1939 by Hahn and Strassmann [1]. The first major development was in theory, the extension of the Time-Dependent Density Functional Theory (TDDFT) [2–5] to superfluid fermion systems [6]. The second development was in computing, the emergence of powerful enough supercomputers capable of solving the complex systems of equations describing the time evolution in three dimensions without any restrictions of hundreds of strongly interacting nucleons. Thus the conditions have been created to renounce phenomenological models and incomplete microscopic treatments with uncontrollable approximations and/or assumptions in the description of the complex dynamics of fission. Even though the available nuclear energy density functionals (NEDFs) are phenomenological still, their accuracy is improving steadily and the prospects of being able to perform calculations of the nuclear fission dynamics and to predict many properties of the fission fragments, otherwise not possible to extract from experiments.},
doi = {10.1051/epjconf/201716300007},
journal = {EPJ Web of Conferences},
number = ,
volume = 163,
place = {United States},
year = {2017},
month = {11}
}

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