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Showing 1 to 20 of 43 for “"Rydberg states"”.
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Alkali Rydberg States in Electromagnetic Fields
… study highly excited hydrogen and alkali atoms (’Rydberg states’) under the influence of a strong microwave field. As the external frequency is comparable to the highly excited electron’s classical Kepler frequency, the external field induces a strong coupling of many different quantum mechanical …
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Excitation Spectroscopy of Krypton Molecular Rydberg States
… 480 (LESSTHEQ) (lamda) (LESSTHEQ) 545 nm, and Rydberg series of krypton dimers have been observed. The most pronounced peaks in the spectrum have been attributed to np('3)(PI)(,g) (<---) 5s('3)(SIGMA)(,u)('+) (7 (LESSTHEQ) n (LESSTHEQ) 18) transitions. The series limit and quantum defect, …
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Millimeter-wave studies of hydrogen Rydberg states
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1997.
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Precision spectroscopy of circular Rydberg states of hydrogen
The Rydberg constant, R[infinity], is the scaling factor which link the spectrum of atomic hydrogen to practical laboratory energy units. Thus it has intrinsic importance by providing information on our simplest atomic system. Precision measurements of the Rydberg constant, or more accurately of …
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Coherent excitation of ultracold atoms between ground and Rydberg states
… coherent population transfer between ground states, and between ground and Rydberg states, in ultracold atoms. In order to study coherent transfer between hyperfine ground states a pair of phase stable Raman beams is required. Both beams are derived from a single master laser before being …
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Experimental Investigation of Long-Lived "ZEKE" Rydberg States in Ultracold Argon
… the dynamics of ultracold plasmas and ultracold Rydberg gases. Ultracold plasmas are typically formed by photo-excitation of ultracold atoms to an energy region near (both above and below) an ionization threshold. Excitation to bound, highly-excited Rydberg states can lead to formation of a …
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Time-resolved absorption spectroscopy of the rare gas dimer Rydberg states
Molecular inter-Rydberg transitions of the rare gas dimers (He$\sb2$ through Kr$\sb2$) have been observed both through intra-cavity and multi-pass laser absorption spectroscopy.
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Charge transport, configuration interaction and Rydberg states under density functional theory
… methods to study electron transport, Rydberg excited states and to characterize diabatic electronic configurations and couplings. We simulate electron transport in a molecular wire using real-time time-dependent density functional theory in order to study the conduction of the wire. We …
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Two-photon spectra of Rydberg states of alkaline-earth atoms (strontium and barium)
… in the two-photon spectra of the high-lying Rydberg states of SrI and Bal placed under a variety of test conditions such as external fields, collisions etc. Orthogonal excitation of a novel atomic jet in a purpose-built heat-pipe setup using a Xenon Chloride excimer laser pumped tunable …
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Electronic structure and electronic-vibrational energy exchange in Rydberg states of calcium monofluoride
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1995.
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The spectroscopy of bound and predissociating Rydberg states of NO in external electric fields
… of static and ramped electric fields to the Rydberg states of NO. Chapter 1 introduces the history of Rydberg states, their exotic properties, decay mechanisms, and the effect of an applied electric field. Chapter 2 details the experimental set-up used for the experiments presented in this …
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Semi-Empirical Lifetimes for High-Energy Rydberg States of ¹³³Cs Neutral Cesium in a Blackbody Radiation Field
… semi-empirically for high-energy excited states of neutral Cesium, using wave functions obtained through direct inward numerical integration of the Schrödinger equation with a central potential modeled by applying a Norcross polarizability correction to the standard Hartree-Slater core …
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An analysis of the photoelectron and Rydberg states of formaldehyde /|nby Carol R. Lessard. -- 260 St. Catharines [Ont.] : Dept. of Chemistry, Brock University,
Although it is generally accepted that Rydberg orbitals are very large and diffuse, and that electron promotion to a Rydberg orbital is not too different from ionization of the molecule, analysis of the two types of transitions proves otherwise. The photoelectron spectrum of the 2B2 (n) ion has …
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Spectroscopy of even-parity states of molecular hydrogen
The dynamic behavior of the even parity states of molecular hydrogen is examined by Resonance Ionization Spectroscopy-Time Of Flight (RIS-TOF} spectroscopy. This is the first time that the autoionization and predissociation yields of individual s and d Rydberg states are detected separately. This …
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A cold strontium Rydberg gas
Cold gases of Rydberg atoms are an ideal system in which to study the novel effects of strong interatomic interactions. This thesis describes the design and construction of the world's first experiment to study Rydberg states in a cold gas of an alkaline earth metal, in this particular case …
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Spectra and dynamics of calcium monochloride
… an ideal molecule for studying molecular Rydberg states, as they are well described as by an ion-core containing two closed shell atomic ions (M2+,X-) and an unpaired electron. The spectra and dynamics of Rydberg states allows the testing of theories of electronic structure and …
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Estudo fotodinâmicos por espectroscopia laser e radiação síncrotron: de pequenos hidrocarbonetos aos polímeros
… The first, the spectroscopy of highly excited states (Rydberg states) of HC3N (between 76000 and 90000 cm-1). This new study of Rydberg states of the HC3N spectroscopy REMPI, (3+1) photons, completes the overview of these Rydberg states, proposed by Connors et al, contributing with corrections …
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Positronium in the AEgIS experiment: study on its emission from nanochanneled samples and design of a new apparatus for Rydberg excitations
… charge exchange reaction, where a cloud of Ps in Rydberg states interacts with cooled trapped antiprotons. Since the charge exchange cross section depends on Ps velocity and quantum number, the velocity distribution of Ps emitted by a positron-positronium converter as well as its excitation in …
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