Laser Spectroscopy of the y${}^7$P${}_J^{\circ }$ states of Cr I

Abstract

Here we report measured and calculated values of decay rates of the 3d${}^4$(${}^5$D)4s4p(${}^3$P${}^{\mathrm{o}}$)\ y${}^7$P${}_{2,3,4}^{\mathrm{o}}$ states of Cr I. The decay rates are measured using time-correlated single photon counting with roughly 1% total uncertainty. In addition, the isotope shifts for these transitions are measured by laser induced fluorescence to roughly 0.5% uncertainty. The decay rate calculations are carried out by a hybrid approach that combines configuration interaction and the linearized coupled cluster method (CI+all-order method). The measurements provide a much needed precision benchmark for testing the accuracy of the CI+all-order approach for such complicated systems with six valence electrons, allowing to significantly expand its applicability. These measurements also demonstrate operation of a cryogenic buffer gas beam source for future experiments with MgF molecules toward quantum blackbody thermometry.

References in corpus (29)

• Magneto-optical trapping of a diatomic molecule
• Spectroscopic observation of SU(N)-symmetric interactions in Sr orbital magnetism
• Multipolar theory of black-body radiation shift of atomic energy levels and its implications for optical lattice clocks
• High-flux beam source for cold, slow atoms or molecules
• Development of a configuration-interaction + all-order method for atomic calculations
• Blackbody radiation shift in the Sr optical atomic clock
• Highly-charged ions for atomic clocks, quantum information, and search for $\alpha$-variation
• E1 amplitudes, lifetimes, and polarizabilities of the low-lying levels of atomic ytterbium
• State-dependent optical lattices for the strontium optical qubit
• A cryogenic beam of refractory, chemically reactive molecules with expansion cooling
• On the use of the $V^{N-M}$ approximation in atomic calculations
• Combining configuration interaction with perturbation theory for atoms with large number of valence electrons
• Narrow-line Cooling and Determination of Magic Wavelength of Cd
• A buffer gas beam source for short, intense and slow molecular pulses
• Search for a Variation of the Fine Structure around the Supermassive Black Hole in Our Galactic Center
• Electric dipole moment enhancement factor of thallium
• Magic wavelengths, matrix elements, polarizabilities, and lifetimes of Cs
• A scripted control system for autonomous hardware timed experiments
• Calculation of hyperfine structure constants for ytterbium
• Quantum Blackbody Thermometry
• Lifetime and hyperfine splitting measurements on the 7s and 6p levels in rubidium
• Nuclear charge radii of ${}^{229}$Th from isotope and isomer shifts
• Nuclear spin-dependent parity-violating effects in light polyatomic molecules
• Accurate prediction of clock transitions in a highly charged ion with complex electronic structure
• Photon arrival time tagging with many channels, sub-nanosecond deadtime, very high throughput, and fiber optic remote synchronization
• A development of the CI + all-order method and application to the parity-nonconserving amplitude and other properties of Pb
• Saturated configuration interaction calculations for five-valent Ta and Db
• Lifetime Measurements of the $A^2{\Pi }_{1/2}$ and $A^2{\Pi }_{3/2}$ States in BaF
• Detection of missing low-lying atomic states in actinium

Cited by in corpus (3)

• pCI: a parallel configuration interaction software package for high-precision atomic structure calculations
• Optical Telecommunications-Band Clock based on Neutral Titanium Atoms
• Radiative Decay Rate and Branching Fractions of MgF