Absolute frequency measurement of the 7s${}^2$ ${}^1$S${}_0$ $-$ 7s7p ${}^1$P${}_1$ transition in ${}^{225}$Ra

Abstract

Transition frequencies were determined for transitions in Ra in an atomic beam and for reference lines in Te${}_2$ molecules in a vapor cell. The absolute frequencies were calibrated against a GPS stabilized Rb-clock by means of an optical frequency comb. The 7s${}^2{}^1$S${}_0$(F = 1/2)-7s7p${}^1$P${}_1$(F = 3/2) transition in ${}^{225}$Ra was determined to be $621042124(2)$MHz. The measurements provide input for designing efficient and robust laser cooling of Ra atoms in preparation of a search for a permanent electric dipole moment in Ra isotopes.

Accepted for publication in the rapid communication of Physical review A

References in corpus (5)

• Sr lattice clock at 1x10^{-16} fractional uncertainty by remote optical evaluation with a Ca clock
• Laser-trapping of Ra-225 and Ra-226 with repumping by room temperature blackbody radiation
• Calculation of energy levels and transition amplitudes for barium and radium
• Isotope shifts of 6s5d ${}^3$D-states in neutral Barium
• Multiconfiguration Dirac-Hartree-Fock calculations of transition rates and lifetimes of the eight lowest excited levels of radium

Cited by in corpus (3)

• Parity and Time-Reversal Violation in Atomic Systems
• Radium Ion Optical Clock
• Spectra of barium, radium, and element 120; application of the combined correlation potential, singles-doubles, and configuration interaction ab initio method