Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei

Quan, S.; Liu, W. P.; Li, Z. P.; Smith, M. S.

doi:10.1103/physrevc.96.054309

Title: Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei

Abstract

Predictions of the spectroscopic properties of low-lying states are critical for nuclear structure studies but are problematic for nuclei with an odd nucleon due to the interplay of the unpaired single particle with nuclear collective degrees of freedom. To predict the spectroscopic properties of odd-mass medium-heavy and heavy nuclei with a model that treats single-particle and collective degrees of freedom within the same microscopic framework. A microscopic core-quasiparticle coupling (CQC) model based on the covariant density functional theory is developed that contains the collective excitations of even-mass cores and spherical single-particle states of the odd nucleon as calculated from a quadrupole collective Hamiltonian combined with a constrained triaxial relativistic Hartree-Bogoliubov model. Additionally, predictions of the new model for excitation energies, kinematic and dynamic moments of inertia, and transition rates are shown to be in good agreement with results of low-lying spectroscopy measurements of the axially deformed odd-proton nucleus ¹⁵⁹Tb and the odd-neutron nucleus ¹⁵⁷Gd. A microscopic CQC model based on covariant density functional theory is developed for odd-mass nuclei and shown to give predictions that agree with measurements of two medium-heavy nuclei. Future studies with additional nuclei are planned.

Authors:

Quan, S. ^[1]; Liu, W. P. ^[1]; Li, Z. P. ^[2];

^[3]

Southwest Univ., Chongqing (China)
Southwest Univ., Chongqing (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Mon Nov 13 00:00:00 EST 2017

Research Org.:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE; National Natural Science Foundation of China (NSFC)

OSTI Identifier:: 1842645

Alternate Identifier(s):: OSTI ID: 1408547

Grant/Contract Number:: AC05-00OR22725; 11475140; 11575148

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C

Additional Journal Information:: Journal Volume: 96; Journal Issue: 5; Journal ID: ISSN 2469-9985

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; collective models; collective levels; nuclear structure & decays; nuclear density functional theory

Citation Formats


                    Quan, S., Liu, W. P., Li, Z. P., and Smith, M. S. Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei.  United States: N. p., 2017. 
Web.  doi:10.1103/physrevc.96.054309.

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                    Quan, S., Liu, W. P., Li, Z. P., & Smith, M. S. Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei.  United States.  https://doi.org/10.1103/physrevc.96.054309

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                    Quan, S., Liu, W. P., Li, Z. P., and Smith, M. S. Mon .  
"Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei".  United States.  https://doi.org/10.1103/physrevc.96.054309.  https://www.osti.gov/servlets/purl/1842645.

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@article{osti_1842645,

  title        = {Microscopic core-quasiparticle coupling model for spectroscopy of odd-mass nuclei},

  author       = {Quan, S. and Liu, W. P. and Li, Z. P. and Smith, M. S.},

  abstractNote = {Predictions of the spectroscopic properties of low-lying states are critical for nuclear structure studies but are problematic for nuclei with an odd nucleon due to the interplay of the unpaired single particle with nuclear collective degrees of freedom. To predict the spectroscopic properties of odd-mass medium-heavy and heavy nuclei with a model that treats single-particle and collective degrees of freedom within the same microscopic framework. A microscopic core-quasiparticle coupling (CQC) model based on the covariant density functional theory is developed that contains the collective excitations of even-mass cores and spherical single-particle states of the odd nucleon as calculated from a quadrupole collective Hamiltonian combined with a constrained triaxial relativistic Hartree-Bogoliubov model. Additionally, predictions of the new model for excitation energies, kinematic and dynamic moments of inertia, and transition rates are shown to be in good agreement with results of low-lying spectroscopy measurements of the axially deformed odd-proton nucleus 159Tb and the odd-neutron nucleus 157Gd. A microscopic CQC model based on covariant density functional theory is developed for odd-mass nuclei and shown to give predictions that agree with measurements of two medium-heavy nuclei. Future studies with additional nuclei are planned.},

  doi          = {10.1103/physrevc.96.054309},

  journal      = {Physical Review C},

  number       = 5,

  volume       = 96,

  place        = {United States},

  year         = {Mon Nov 13 00:00:00 EST 2017},

  month        = {Mon Nov 13 00:00:00 EST 2017}

}

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