Nuclear Deformation at Finite Temperature
Abstract
Deformation, a key concept in our understanding of heavy nuclei, is based on a mean-field description that breaks the rotational invariance of the nuclear many-body Hamiltonian. Here, we present a method to analyze nuclear deformations at finite temperature in a framework that preserves rotational invariance. The auxiliary-field Monte-Carlo method is used to generate the statistical ensemble and calculate the probability distribution associated with the quadrupole operator. Applying the technique to nuclei in the rare-earth region, we identify model-independent signatures of deformation and find that deformation effects persist to higher temperatures than the spherical-to-deformed shape phase-transition temperature of mean-field theory.
- Authors:
-
- Yale Univ., New Haven, CT (United States). Center for Theoretical Physics, Sloane Physics Lab.
- Univ. of Washington, Seattle, WA (United States). Dept. of Physics and Inst. of Nuclear Theory
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Yale Univ., New Haven, CT (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1565374
- Alternate Identifier(s):
- OSTI ID: 1181046
- Grant/Contract Number:
- AC05-00OR22725; AC02-05CH11231; FG02-96ER40963; SC0008499; FG02-00ER411132; FG02-91ER40608
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 113; Journal Issue: 26; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Physics
Citation Formats
Alhassid, Y., Gilbreth, C. N., and Bertsch, G. F. Nuclear Deformation at Finite Temperature. United States: N. p., 2014.
Web. doi:10.1103/physrevlett.113.262503.
Alhassid, Y., Gilbreth, C. N., & Bertsch, G. F. Nuclear Deformation at Finite Temperature. United States. https://doi.org/10.1103/physrevlett.113.262503
Alhassid, Y., Gilbreth, C. N., and Bertsch, G. F. Tue .
"Nuclear Deformation at Finite Temperature". United States. https://doi.org/10.1103/physrevlett.113.262503. https://www.osti.gov/servlets/purl/1565374.
@article{osti_1565374,
title = {Nuclear Deformation at Finite Temperature},
author = {Alhassid, Y. and Gilbreth, C. N. and Bertsch, G. F.},
abstractNote = {Deformation, a key concept in our understanding of heavy nuclei, is based on a mean-field description that breaks the rotational invariance of the nuclear many-body Hamiltonian. Here, we present a method to analyze nuclear deformations at finite temperature in a framework that preserves rotational invariance. The auxiliary-field Monte-Carlo method is used to generate the statistical ensemble and calculate the probability distribution associated with the quadrupole operator. Applying the technique to nuclei in the rare-earth region, we identify model-independent signatures of deformation and find that deformation effects persist to higher temperatures than the spherical-to-deformed shape phase-transition temperature of mean-field theory.},
doi = {10.1103/physrevlett.113.262503},
journal = {Physical Review Letters},
number = 26,
volume = 113,
place = {United States},
year = {Tue Dec 30 00:00:00 EST 2014},
month = {Tue Dec 30 00:00:00 EST 2014}
}
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