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13 papers · 2 filters
Electron recombination, photoionization and scattering via many-electron compound resonances
V. A. Dzuba, V. V. Flambaum, G. F. Gribakin +2
Highly excited eigenstates of atoms and ions with open f shell are chaotic superpositions of thousands, or even millions of Hartree-Fock determinant states. The interaction between…
Enhanced effects of temporal variation of the fundamental constants in ^{2}Π_{1/2} term diatomic molecules: ^{207}Pb^{19}F
V. V. Flambaum, Y. V. Stadnik, M. G. Kozlov +1
The ^{207}Pb^{19}F molecule possesses a pair of closely spaced levels of opposite parity due to near cancelation of the omega-type doubling and magnetic hyperfine interaction energ…
Zeeman-tuned rotational level-crossing spectroscopy in a diatomic free radical
S. B. Cahn, J. Ammon, E. Kirilov +6
Rotational levels of molecular free radicals can be tuned to degeneracy using laboratory-scale magnetic fields. Because of their intrinsically narrow width, these level crossings o…
Ultracold Heteronuclear Mixture of Ground and Excited State Atoms
Alexander Khramov, Anders Hansen, William Dowd +5
We report on the realization of an ultracold mixture of lithium atoms in the ground state and ytterbium atoms in the excited metastable 3P2 state. Such a mixture can support broad…
A search for varying fundamental constants using Hz-level frequency measurements of cold CH molecules
S. Truppe, R. J. Hendricks, S. K. Tokunaga +5
Many modern theories predict that the fundamental constants depend on time, position, or the local density of matter. We develop a spectroscopic method for pulsed beams of cold mol…
Theory of the multiphoton cascade transitions with two photon links: comparison of Quantum Electrodynamical and Quantum Mechanical approaches
T. Zalialiutdinov, Yu. Baukina, D. Solovyev +1
QED theory of multiphoton cascade transitions in atoms and ions is developed. In particular the , and processes are…