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Showing 1 to 20 of 80 for “"Molecular physics"”.
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Rovibrational Dynamics of Nuclei and Molecules
… dynamics with applications to nuclear and molecular models. Firstly we consider small vibrations of Skyrmions (topological solitons which model atomic nuclei), developing new approximations to their quantum energy spectra which incor- porate both rotation-vibration and isorotation-vibration …
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Theoretical and experimental secondary electron spin polarisation studies and 3D theory of field emission for nanoscale emitters
… spin-dependent phenomena in fields of atomic and molecular physics, magnetism and biophysics. For this purpose, this work explores both theoretical and experimental aspects of field emission properties of point-like nano-scale emission sources with special emphasis on their spin-polarising …
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Investigating multiphoton phenomena using nonlinear dynamics
… more potential applications of this approach in molecular physics.
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Photoassociative Spectroscopy of Ultracold Metastable Argon and Study of Dual Species Trap Loss in a Rubidium-Metastable Argon MOT
… investigations in ultracold atomic and molecular physics: The study of the dual species trap loss in a rubidium - metastable argon magneto-optical trap and the photoassociative spectroscopy of ultracold metastable argon. The interspecies trap loss rate coefficients have been measured for …
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FLUORESCENCE STUDIES OF EXCIPLEX MOLECULES IN THE VACUUM ULTRAVIOLET REGIME
This work describes the development of a unique capability for electron beam excitation of hot vapors combined with VUV spectroscopy. The first result obtained with this new facility was the observation of emission from the triatomic rare gas halide Ne$\sb 2$F* at 132 nm. An investigation of the …
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A STUDY OF LOW ENERGY ELECTRON-MOLECULE AND ION-MOLECULE COLLISIONS USING RYDBERG ATOMS (IONIZATION, ASSOCIATION, ATTACHMENT, OXYGEN, WATER)
Low energy collisions between Rydberg atoms and neutral molecules have been investigated over a wide range of principal quantum numbers n, and for several different neutral targets. The results have been used to validate the free-electron, independent particle model of Rydberg atom collisions. …
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Gas phase production of single-walled carbon nanotubes
Single-walled carbon nanotubes have been produced in a continuous flow gasphase catalytic growth process, in a heated flow of carbon monoxide at pressures of 1--10 atmospheres and temperatures of 800--1200°C. Catalytic cluster nuclei for the nanotubes are generated in situ by thermal …
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Vibrational and anion photoelectron spectroscopy of transition metal clusters
… atomic ar rangements is a central topic in molecular physics. The bonding mechanisms of transition metal atoms still constitute a challenge in their theoretical de scription due to the massive number of valence electrons. Moreover, small transition metal clusters and their complexes may …
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A resonant ultrasound spectroscopy study of hydrogen-absorbing intermetallic compounds
Resonant ultrasound spectroscopy (RUS) has been, used to study four different hydrogen-absorbing intermetallic compounds. A fundamental study of the properties of hydrogen motion within a host metal lattice was undertaken, on two different Cl5 Laves-phase compounds. These results have been obtained …
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Deposition of diamond films on steel substrates for tribiological applications
Contains fulltext : 53731_depoofdif.pdf (Publisher’s version ) (Open Access) Contains fulltext : 72152.pdf (Publisher’s version ) (Open Access)
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Electron Removal Processes in Proton-Methane Collisions
… we have used a spectral representation of the molecular Hamiltonian and a single-centre expansion of the initially populated molecular orbitals. The two-centre basis gen- erator method is then used to solve the time-dependent single-particle Schr ̈odinger equations. We have also used the …
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Molecular dynamics simulation study of the stability and conformation of spin-probe labeled DNAs
… introduced to study its structure and dynamics. Molecular modeling has proven to be an increasingly powerful tool for studying structure and dynamics of biologically interesting, molecules. As part of our work, we have conducted molecular dynamics simulations on both double-stranded (ds) and …
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Rare gas alkali ionic excimers
The rare gas alkali ionic molecules are established as a new class of ionic excimers which emit in the vacuum ultraviolet (VUV) regime of the electromagnetic spectrum. Temporal and spectral characteristics of these species with (XeRb)$\sp{+}$ at 164 nm and (XeCs)$\sp{+}$ at 160 nm have been …
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Absolute differential and integral cross sections for charge transfer of state-selected keV oxygen ion with oxygen(2)
Absolute differential and integral charge transfer cross sections have been measured for 0.5, 0.85, 1.5, 2.8, and 5.0 keV O$\sp+$ with O$\sb2$ at scattering angles between 0.01$\sp\circ$ and 3.50$\sp\circ$ in the laboratory frame. The dependence of these cross sections upon the electronic state of …
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Low energy electron attachment to buckminsterfullerene in Rydberg atom-buckminsterfullerene collisions
$C\sb{60}\sp-$ ion formation has been observed in collisions between K(np) Rydberg atoms with principal quantum numbers $\rm35\leq n\leq125,$ which corresponds to electrons with mean energies in the range $\sim$2 meV to $\sim$170 $\mu$eV, and $C\sb{60}$ molecules. This results from Rydberg electron …
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461nm laser for studies in ultracold neutral strontium
A 461 nm laser was constructed for the purposes of studying ultracold neutral strontium. The dipole-allowed 1 S0 → 1P1 transition at 460.862 nm can be used in laser cooling and trapping; optical imaging, Zeeman slowing, and photoassociative spectroscopy. We produce light at this wavelength by …
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Fine-scale modeling of failure in an adhesive layer
Rigid ceramic filter media are used for removing particulate matter from gas streams at high temperatures. As the particulate matter (dust cake) collects on the surface of the filter, the filtration pressure increases; to maintain an economical operation the dust cake must be removed periodically …
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Interfacial properties of fluid phases in two dimensions and of three-component surfactant systems
… phases is determined by using the method of molecular dynamics. Within statistical uncertainty, the results for the interfacial thickness are found to be consistent with the prediction of the non-classical van der Waals theory of the intrinsic interface. The second problem studied in this …
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Determining molecular chirality with femtosecond LASERs
More than 200 years since its first discovery Chirality remains one of the most challenging aspects of analytical chemistry. As chiral enantiomers share almost all physical properties they are only distinguishable through interaction with another chiral system, be it chiral molecules or circularly …
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