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Title: Multidimensional Skyrme-density-functional study of the spontaneous fission of 238U

Abstract

We determined the spontaneous fission lifetime of 238U by a minimization of the action integral in a three-dimensional space of collective variables. Apart from the mass-distribution multipole moments Q 20 (elongation) and Q 30 (left–right asymmetry), we also considered the pairing-fluctuation parameter λ 2 as a collective coordinate. The collective potential was obtained self-consistently using the Skyrme energy density functional SkM*. The inertia tensor was obtained within the nonperturbative cranking approximation to the adiabatic time-dependent Hartree–Fock–Bogoliubov approach. As a result, the pairing-fluctuation parameter λ 2 allowed us to control the pairing gap along the fission path, which significantly changed the spontaneous fission lifetime.

Authors:
 [1];  [2];  [3];  [4];  [1];  [5]
  1. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); The Niewodniczanski Institute of Nuclear Physics, Krakow (Poland)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw, Warsaw (Poland); Univ. of Jyvaskyla (Finland)
  4. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw, Warsaw (Poland)
  5. Univ. of Warsaw, Warsaw (Poland)
Publication Date:
Research Org.:
Michigan State Univ., East Lansing, MI (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1233541
Alternate Identifier(s):
OSTI ID: 1338504
Grant/Contract Number:
NA0002574; AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Acta Physica Polonica. Series B
Additional Journal Information:
Journal Volume: 46; Journal Issue: 3; Journal ID: ISSN 0587-4254
Publisher:
Jagiellonian University
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Sadhukhan, J., Mazurek, K., Dobaczewski, J., Nazarewicz, W., Sheikh, J. A., and Baran, A. Multidimensional Skyrme-density-functional study of the spontaneous fission of 238U. United States: N. p., 2015. Web. doi:10.5506/APhysPolB.46.575.
Sadhukhan, J., Mazurek, K., Dobaczewski, J., Nazarewicz, W., Sheikh, J. A., & Baran, A. Multidimensional Skyrme-density-functional study of the spontaneous fission of 238U. United States. doi:10.5506/APhysPolB.46.575.
Sadhukhan, J., Mazurek, K., Dobaczewski, J., Nazarewicz, W., Sheikh, J. A., and Baran, A. Thu . "Multidimensional Skyrme-density-functional study of the spontaneous fission of 238U". United States. doi:10.5506/APhysPolB.46.575. https://www.osti.gov/servlets/purl/1233541.
@article{osti_1233541,
title = {Multidimensional Skyrme-density-functional study of the spontaneous fission of 238U},
author = {Sadhukhan, J. and Mazurek, K. and Dobaczewski, J. and Nazarewicz, W. and Sheikh, J. A. and Baran, A.},
abstractNote = {We determined the spontaneous fission lifetime of 238U by a minimization of the action integral in a three-dimensional space of collective variables. Apart from the mass-distribution multipole moments Q20 (elongation) and Q30 (left–right asymmetry), we also considered the pairing-fluctuation parameter λ2 as a collective coordinate. The collective potential was obtained self-consistently using the Skyrme energy density functional SkM*. The inertia tensor was obtained within the nonperturbative cranking approximation to the adiabatic time-dependent Hartree–Fock–Bogoliubov approach. As a result, the pairing-fluctuation parameter λ2 allowed us to control the pairing gap along the fission path, which significantly changed the spontaneous fission lifetime.},
doi = {10.5506/APhysPolB.46.575},
journal = {Acta Physica Polonica. Series B},
number = 3,
volume = 46,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

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