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Showing 1 to 18 of 18 for “"photoassociation"”.
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Photoassociation of krypton and fluorine collision pairs
The photoassociation spectrum of Kr-F collision pairs in thermal equilibrium (293$\sp\circ$K) to KrF(B) has been observed using a laser-induced fluorescence technique with a tunable probe over the wavelength range 219 nm $\leq$ $\lambda$ $\leq$ 250 nm. The spectrum was then analyzed by numerical …
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Experimental Studies of LiRb: Spectroscopy and Ultracold Molecule Formation by Photoassociation
… the production of ultracold LiRb molecules by photoassociation (PA).</p> <p>The LiRb molecule is the least studied among all bi-alkali molecules and the first spectroscopic measurements on hot vapor phase LiRb molecules were reported only in 2011. We describe these measurements and their …
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Optical Excitation of Metastable Krypton and Photoassociative Spectroscopy of Ultracold RbAr
… <p>In the second body of work, we perform photoassociation spectroscopy in an ultracold, heteronuclear Rb + Ar* system. Photoassociation is a method that may be used to both 1) produce ultracold molecules, and 2) perform high-resolution spectroscopy on excited molecular states. Most work …
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Photoassociative Spectroscopy of Ultracold Argon and Krypton Confined in a Magneto Optical Trap
… produce ultracold molecules; the most common is photoassociation where two ultracold atoms collide in the presence of light that induces a free-bound transition to an excited molecular state. Photoassociation can also be used to perform spectroscopy in order to map out the ro-vibrational levels …
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Atomic alkali lasers pumped by the dissociation of photoexcited alkali-rare gas collision pairs
A new class of photoassociation lasers has been demonstrated in which photoexcited alkali-rare gas collision pairs dissociate in order to produce inversion on atomic alkali transitions. The pump acceptance bandwidths of these excimer bands, historically referred to as spectral satellites, have been …
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Diatomic excimer dynamics in microplasma lamps and alkali lasers
… the Hg+ vacuum-ultraviolet lamp (194.2 nm). The photoassociation and subsequent stimulated emission of cesium (Cs) - rare gas (Ar or Xe) pairs were examined by laser pump-probe experiments, and an optical-to-optical energy conversion efficiency of ~28% was observed when Cs-Ar pairs were pumped at …
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Ultracold ²³Na⁶Li molecules in the triplet ground state
… potentials of NaLi using one- and two-photon photoassociation spectroscopy. We present the spectroscopic positions and strengths of transitions to nearly all vibrational states in the excited c³[sigma]⁺ and ground ³[sigma]⁺ potentials of NaLi. This is the first spectroscopic observation of …
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Atoms and Molecules Immersed in a Bose-Einstein Condensate
… the presence of the BEC. We demonstrate direct photoassociation from Bose polarons to electron- ically excited molecular states, dark resonance spectroscopy of the absolute ground state molecular state, and finally stimulated rapid adiabatic passage (STIRAP) of Bose polarons into the molecular …
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Building an apparatus for ultracold lithium-potassium Fermi-Fermi mixtures
… 3D MOT. In the 3D MOT, we will perform photoassociation spectroscopy on the atoms to determine the Li-K molecular energies and collisional properties. Using this information, we can transfer weakly-bound Feshbach LiK molecules into their ground state. LiK has an electric dipole moment …
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Optical Processes in Krypton and Krypton(2)fluoride: Absolute Cross-Sections for Multiphoton Ionization of Krypton (1S(0)), Photoionization of Metastable Atomic and Molecular States of Krypton, Andabsorption of Krypton(2)fluoride (4-Doublet-Gamma)
… (4('2)(GAMMA)) and the results are compared. Photoassociation of KrF(B) was also observed and used as a further check on the results.
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Spectroscopy of Ultracold LiRb Molecules Using Ionization Detection
… excited state molecules in a process known as photoassociation (PA). We explore weakly bound vibrational levels of LiRb with PA spectroscopy using ionization detection and, where possible, compare our results with earlier measurements performed in our lab using trap-loss spectroscopy. In …
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Ultralong range Rydberg molecules : investigation of a novel binding
… present experiments have demonstrated the direct photoassociation of these ultralong-range Rydberg molecules for Rb(ns)-Rb(5s) triplet states from a cold and dense sample of rubidium 87 atoms for a range of principal quantum numbers, n, between 34 and 40. The high-resolution photoassociation …
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Experimental and theoretical studies of the ScI, YI, Hg2, and XeI diatomic molecules
… simulated quantum mechanically. The simulated photoassociation spectrum reproduces all significant spectral details of the experimental spectrum. A new detailed potential model of the XeI ground state and a novel internuclear separation (R) segment-by-segment spectral simulation technique have …
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Aromaticity Across States: A Framework for Reactivity and Structure in Organic Systems
… [4n+2] systems (e.g., borepins, pyrroles) favor photoassociation through relief of excited-state antiaromaticity. This framework further explains unusual photochemical behaviors, including bond-cleavage induced charge transfer in borafluorenes. The third part addresses the structural challenge of …
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Photoassociative ionization in cold rubidium
Many people in the science community are interested in the prospect of cold molecules for such applications as quantum computing and molecular Bose-Einstein condensates. Current methods of production fall short of the requirements for such projects. Photo association is a promising technique for …
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Bound-Free Emission and its Application to Broadband Optical Amplifiers
The potential for zinc and cadmium excimers to act as ultraviolet broadband ampli er media is investigated. A detailed presentation of the theory of bound-free emission and free-bound absorption is given. New internuclear potential curves for the B1 + u upper states of both cadmium and zinc …
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Laser physics and spectroscopy in alkali vapor-noble gas mixtures
Made available in DSpace on 2016-11-10T17:50:11Z (GMT). No. of bitstreams: 3 MIRONOV-DISSERTATION-2016.pdf: 6205158 bytes, checksum: 687c637d91de3678cd06c0ac128cc9de (MD5) LICENSE.txt: 4211 bytes, checksum: 579b011604a410b4c70e1fcdaaae2ee9 (MD5) PROQUEST_LICENSE.txt: 4557 bytes, checksum: …
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Theoretical Investigation of Photoassociative Excitation Spectroscopy of Xenon Monoiodide
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-11-14T18:17:43Z No. of bitstreams: 1 Shen_Fang.pdf: 5645454 bytes, checksum: 6ad723e4c0b7768d1a8d6e6a43bf13f7 (MD5)