Transition properties of potassium atom

Abstract

We report here oscillator strengths, transition rates, branching ratios and lifetimes due to allowed transitions in potassium (K) atom. We evaluate electric dipole (E1) amplitudes using an all order relativistic many-body perturbation method. The obtained results are compared with previously available experimental and theoretical studies. Using the E1 matrix elements mentioned above and estimated from the lifetimes of the 4P states, we determine precise values of static and dynamic polarizabilities for the first five low-lying states in the considered atom. The static polarizabilities of the ground and 4P states in the present work are more precise than the available measurements in these states. Only the present work employs relativistic theory to evaluate polarizabilities in the 3D states for which no experimental results are known to compare with. We also reexamine "magic wavelengths" for the $4P_{1/2}\to 4S$ and $4P_{3/2}\to 4S$ transitions due to the linearly polarized light which are useful to perform state-insensitive trapping of K atoms.

12 pages, 2 figures

References in corpus (5)

• Optical Lattice Induced Light Shifts in an Yb Atomic Clock
• Magic wavelengths for the np-ns transitions in alkali-metal atoms
• State-insensitive trapping of Rb atoms: linearly versus circularly polarized lights
• An {\it ab initio} relativistic coupled-cluster theory of dipole and quadrupole polarizabilities: Applications to a few alkali atoms and alkaline earth ions
• Revisiting Nuclear Quadrupole Moments in ${}^{39-41}$K Isotopes

Cited by in corpus (7)

• Photo-induced two-body loss of ultracold molecules
• Measurements of the Ground-State Polarizabilities of Cs, Rb, and K using Atom Interferometry
• Magic wavelengths for trapping the alkali-metal atoms with circularly polarized light
• Optical high-resolution spectroscopy of 14 young $\alpha$-rich stars
• A sensitive spectral survey of interstellar features in the near-UV [3050-3700Å]
• Relativistic Spectroscopy of Plasma Embedded Li-like Systems with the Screening Effects in the Two-body Debye Potentials
• Ab initio Calculations of Electric Dipole Polarizabilities in the Li, Na and K Atoms