Enhanced moments of inertia for rotation in neutron-rich nuclei

Kenichi Yoshida (Department of Physics, Kyoto University, Kyoto, 606-8502, Japan)

Ground-state moments of inertia (MoI) are investigated for approximately 1700 even–even nuclei from the proton drip line to the neutron drip up to Z=120 and N=184. The cranked Hartree–Fock–Bogoliubov equation is solved in the coordinate space using the Skyrme and pairing energy density functionals. This model well describes the available experimental data of the first excited Iπ=2+ state energy of more than 300 nuclides possessing appreciable deformation. The MoI is found to greatly increase near the drip line, whereas the deformation is found to be not as strong as estimated by the empirical relation when the pairing functional including the isovector-density dependence is adopted. The currently used pairing functionals produce large uncertainties in the prediction of E(21+) values near the neutron drip line.

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      "title": "Enhanced moments of inertia for rotation in neutron-rich nuclei"
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      "value": "Ground-state moments of inertia (MoI) are investigated for approximately 1700 even\u2013even nuclei from the proton drip line to the neutron drip up to <math><mi>Z</mi><mo>=</mo><mn>120</mn></math> and <math><mi>N</mi><mo>=</mo><mn>184</mn></math>. The cranked Hartree\u2013Fock\u2013Bogoliubov equation is solved in the coordinate space using the Skyrme and pairing energy density functionals. This model well describes the available experimental data of the first excited <math><msup><mrow><mi>I</mi></mrow><mrow><mi>\u03c0</mi></mrow></msup><mo>=</mo><msup><mrow><mn>2</mn></mrow><mrow><mo>+</mo></mrow></msup></math> state energy of more than 300 nuclides possessing appreciable deformation. The MoI is found to greatly increase near the drip line, whereas the deformation is found to be not as strong as estimated by the empirical relation when the pairing functional including the isovector-density dependence is adopted. The currently used pairing functionals produce large uncertainties in the prediction of <math><mi>E</mi><mo>(</mo><msubsup><mrow><mn>2</mn></mrow><mrow><mn>1</mn></mrow><mrow><mo>+</mo></mrow></msubsup><mo>)</mo></math> values near the neutron drip line."
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Published on:
26 June 2024
Publisher:
Elsevier
Published in:
Physics Letters B , Volume 834 C (2024)

Article ID: 137458
DOI:
https://doi.org/10.1016/j.physletb.2022.137458
Copyrights:
The Author
Licence:
CC-BY-3.0

Fulltext files: