Investigations of Ra${}^{+}$ properties to test possibilities of new optical frequency standards

Abstract

The present work tests the suitability of the narrow transitions $7s{}^2{S}_{1/2}\to 6d^2{D}_{3/2}$ and $7s^2{S}_{1/2}\to 6d^2{D}_{5/2}$ in Ra${}^{+}$ for optical frequency standard studies. Our calculations of the lifetimes of the metastable $6d$ states using the relativistic coupled-cluster theory suggest that they are sufficiently long for Ra${}^{+}$ to be considered as a potential candidate for an atomic clock. This is further corroborated by our studies of the hyperfine interactions, dipole and quadrupole polarizabilities and quadrupole moments of the appropriate states of this system.

Latex files, 5 pages, 1 figure

Cited by in corpus (9)

• Standard Model tests with trapped radioactive atoms
• Laser Cooling of Radium Ions
• Quadruply Ionized Barium as a Candidate for a High-Accuracy Optical Clock
• Ab initio determination of polarizabilities and van der Waals coefficients of Li atoms using the relativistic CCSD(T) method
• Ba${}^{+}$ Quadrupole Polarizabilities: Theory versus Experiment
• Laser cooling and trapping of ${}^{224}$Ra${}^{+}$
• Measurement of the Ra${}^{+}$ $7p$ ${}^2{P}_{3/2}$ state lifetime
• Theoretical characterisation of the barium II and radium II ions
• Lifetimes of the Metastable $6\mathrm{d}{}^2{\mathrm{D}}_{5/2}$ and $6\mathrm{d}{}^2{\mathrm{D}}_{3/2}$ States of Ra${}^{+}$