| Autor: |
Porsev SG; Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA.; Petersburg Nuclear Physics Institute of NRC 'Kurchatov Institute', Gatchina, Leningrad District 188300, Russia., Safronova MS; Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA., Kozlov MG; Petersburg Nuclear Physics Institute of NRC 'Kurchatov Institute', Gatchina, Leningrad District 188300, Russia.; St. Petersburg Electrotechnical University LETI, St. Petersburg 197376, Russia. |
| Abstrakt: |
Determination of nuclear moments for many nuclei relies on the computation of hyperfine constants, with theoretical uncertainties directly affecting the resulting uncertainties of the nuclear moments. In this work, we improve the precision of such a method by including for the first time an iterative solution of equations for the core triple cluster amplitudes into the relativistic coupled-cluster method, with large-scale complete basis sets. We carried out calculations of the energies and magnetic dipole and electric quadrupole hyperfine structure constants for the low-lying states of ^{229}Th^{3+} in the framework of such a relativistic coupled-cluster single double triple method. We present a detailed study of various corrections to all calculated properties. Using the theory results and experimental data, we found the nuclear magnetic dipole and electric quadrupole moments to be μ=0.366(6)μ_{N} and Q=3.11(2) eb, respectively, and reduce the uncertainty of the quadrupole moment by a factor of 3. The Bohr-Weisskopf effect of the finite nuclear magnetization is investigated, with bounds placed on the deviation of the magnetization distribution from the uniform one. |
