Results 141 to 150 of about 2,717 (174)
Some of the next articles are maybe not open access.
Photoassociation of heteronuclear lithium
Applied Physics B, 2001Photoassociation of ultracold heteronuclear 6Li7Li molecules is observed inside a combined magneto-optical trap for 6Li and 7Li. The trapped atomic cloud is illuminated by a tunable single-mode laser and the number of trapped 7Li atoms is monitored by absorption spectroscopy. Characteristic hyperfine resolved spectra have been recorded for singlet spin
U. Schlöder, C. Silber, C. Zimmermann
openaire +1 more source
Photoassociative Spectroscopy of Laser-Cooled Atoms
Annual Review of Physical Chemistry, 1995Advances in laser cooling of neutral atoms have made possible a new form of high-resolution laser spectroscopy: photoassociation of ultracold atoms. Colliding neutral atoms, confined in a laser trap, are photoassociated to bound excited states of the dimer molecule by absorbing a photon from a tunable laser.
P D, Lett, P S, Julienne, W D, Phillips
openaire +2 more sources
Photoassociation of metastable helium
Europhysics Letters (EPL), 2005A theoretical study is performed for the photoassociation of metastable helium. Combining short-range, high-level, ab initio calculations for 5Σg/u+ and 5Πg/u symmetries and long-range behaviour, better described in Hund's case (c), potential-energy curves for attractive, 5Σu+ and 5Πg, as well as repulsive, 5Πu and 5Σg+, states of quintet metastable ...
Dickinson AS, Gadea FX, Leininger T
openaire +2 more sources
Reflection approximation in photoassociation spectroscopy
Physical Review A, 2000We construct an analytical wave function in the phase-amplitude formalism to describe collisions between two neutral atoms. This wave function is valid from intermediate to asymptotic internuclear distance over a large energy range near zero energy, and is especially suitable for cold and ultracold collisions.
C. Boisseau +3 more
openaire +1 more source
Photoassociation, cold molecules and prospects
Comptes Rendus de l'Académie des Sciences - Series IV - Physics, 2001Abstract Photoassociation of cold atoms opens a promising way for the obtention of dense samples of cold molecules. In a photoassociation process, two atoms absorb resonantly one photon to form a cold molecule in a ro-vibrational level of an electronically excited state.
B. Laburthe Tolra +10 more
openaire +1 more source
2019
With the one-photon photoassociation measurements complete, we now expand our binding energy measurements to the ground state. An accurate model of the electronic ground state potential is essential for accurate prediction of interspecies Feshbach resonances and can also be used to calculate interspecies scattering lengths.
openaire +1 more source
With the one-photon photoassociation measurements complete, we now expand our binding energy measurements to the ground state. An accurate model of the electronic ground state potential is essential for accurate prediction of interspecies Feshbach resonances and can also be used to calculate interspecies scattering lengths.
openaire +1 more source
Fano profiles in two-photon photoassociation spectra
Faraday Discussions, 2009In this article we derive the lineshapes observed in two-photon photoassociation spectrocopy of molecules using an effective Hamiltonian adapted from previous work in atomic physics. The lineshape is decomposed in terms of sums and products of Breit-Wigner and Fano profiles, which we associate with physical absorption and emission processes, and to ...
Maximilien, Portier +2 more
openaire +2 more sources
2019
Photoassociation is an important tool in the field of ultracold AMO physics [38]. It extends the fantastic progress of precision spectroscopy in ultracold atoms into the molecular domain. The technique allows precise measurements of molecular potentials useful for characterising atomic interactions and for studies of quantum chemistry [46 ...
openaire +1 more source
Photoassociation is an important tool in the field of ultracold AMO physics [38]. It extends the fantastic progress of precision spectroscopy in ultracold atoms into the molecular domain. The technique allows precise measurements of molecular potentials useful for characterising atomic interactions and for studies of quantum chemistry [46 ...
openaire +1 more source
Laser-induced photoassociation of ultracold sodium atoms
Physical Review Letters, 1987We present the theory of laser-induced radiative association in terms of a scattering resonance formalism and apply this theory to the specific case of Na atom collisions at a temperature of 10 mK. Use of ultracold atoms permits a new kind of high-resolution free-bound spectroscopy for the study of near-threshold collisions and excited-state energy ...
, Thorsheim, , Weiner, , Julienne
openaire +2 more sources
Photoassociation in Cold Atoms via Ladder Excitation
Physical Review Letters, 2007We explore 2-color photoassociative ionization in cold Rb vapor and present experimental evidence that the molecular ions are produced from the stepwise excitation of a ladder of molecular states. We also explore a new process, dubbed photoassociative-dissociative ionization, by which atomic ions are created by excitation through a ladder of molecular ...
Trachy, M. L. +4 more
openaire +2 more sources