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Hellmann-Feynman forces and dipole moments using multiple-scattering Xa wavefunctions for diatomic moleculesLi, Choy Hing, January 1975 (has links)
Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 153-155).
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O potencial Van der Waals dipolo-quadrupolo / Dipole-quadrupole Van Der Walls potentialsJose Carlos Antonio 09 February 1981 (has links)
Estudamos a parte dipolo-quadrupolo da energia de interação entre dois sistemas neutros, para distâncias intermediárias e grandes em relação às dimensões lineares dos mesmos / We study the dipole-quadrupole parto f the interaction energy between two neutral systems for intermediary distances and large distances in relation to its linears dimensions
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Some topics in atomic and nuclear theory : a study of the electric dipole transitions in the reaction C¹²(p,γp')C¹²Wong, H. V. January 1965 (has links)
No description available.
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The application of dielectric measurements to the study of molecular structure and interactionHamilton, A. J. January 1968 (has links)
No description available.
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Dipole moment of the 3P state of HN as determined from optical observations of the Stark effectIrwin, Timothy Alexander Ready January 1965 (has links)
The value of the dipole moment ,μ, of NH in the A³π state was found to be 1.31 ± .03 Debye. This value was
determined from data on the Stark effect measured from
spectrograms of the A³π- X³Σ-, 3360 Å, band taken on a
3.4 meter grating spectrograph in third order giving a resolution of about 100,000. The theory of the Stark
effect in molecules was taken from papers by W. G. Penny5
and Van Vleck and Hill9 . The magnitude of the electric field was determined from the Stark splitting of the hydrogen line Hβ according to the theory given in The Theory of Atomic Spectra6 . In the near future I should be able to complete work on the c’π→a’Δ, 3240 Å, band and give the values of the dipole moments for states c and a as well. Thus it will be possible to determine how the dipole moment changes with electronic configuration. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
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Vortices in the near field of optical dipole radiationLi, Xin 10 December 2010 (has links)
An oscillating electric dipole emits radiation, and the flow of energy is represented by the field lines of the Poynting vector. In the most general state of oscillation the dipole moment vector traces out an ellipse. We have evaluated analytically and numerically the field lines of the Poynting vector for the emitted light, and it appears that each field line lies on a cone, which has its axis perpendicular to the plane of the ellipse. The field lines exhibit a vortex structure near the location of the dipole, and they approach a straight line in the far field. The spatial extent of the optical vortex is well below the wavelength of the emitted radiation. It is shown that the asymptotic limit of a field line is displaced as compared to a ray which would come directly out of the source. This nearield vortex pattern will also lead to a shift of the intensity distribution of the radiation in the far field. The emission of radiation by a linearly oscillating electric dipole is drastically altered when the dipole is close to a mirror. The energy is not emitted along optical rays, as for a free dipole, but as a set of four optical vortices. At a larger distance from the dipole singularities and isolated vortices appear. It is shown that most of these interference vortices are due to the vanishing of the magnetic field at their centers. In the plane of the mirror there is a singular circle with a diameter which is proportional to the distance between the dipole and the mirror. Inside this circle, all energy flows to a singularity on the mirror surface. We have also demonstrated a peculiar property of energy transport of optical dipole radiation in a negative index of refraction material (NIM). When the particle is embedded in a NIM and the dipole moment is rotating, the direction of rotation of the field lines of energy flow is reversed as compared to the rotation of the field lines for emission in a dielectric.
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Studies towards the synthesis of new carbohydrate-derived heterocyclesWei, Li January 1998 (has links)
No description available.
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Novel Design of a Wideband Ribcage-Dipole Array and its Feeding NetworkHarty, Daniel D. 14 January 2011 (has links)
In this thesis the focus was on the design, fabrication, and tests of the feeding networks individually and within an array system. The array feeding network is a corporate-fed type utilizing equal-split, stepped-multiple sections of the conventional Wilkinson power divider in microstrip form with a unique topology. The feeding network was specifically designed for a broadside relatively small linearly-polarized wideband UHF non-scanning array for directed power applications that uses an array radiator with a new volumetric ribcage dipole configuration. The array has a large impedance bandwidth and consistent front lobe gain over the wide frequency band. Theoretical and experimental results describing the performance of the array feeding network and the array are presented and discussed.
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ENHANCEMENT OF RYDBERG ATOM INTERACTIONS USING DC AND AC STARK SHIFTSBohlouli-Zanjani, Parisa January 2010 (has links)
This thesis reports the use of both dc and ac electric fi eld induced resonant
energy transfer, RET, between cold Rydberg atoms as a useful tool for enhancement
of interatomic interactions. A general technique for laser frequency stabilization and
its suitability for Rydberg atom excitation is also demonstrated.
RET between cold Rydberg atoms was used to determine Rydberg atom energy
levels. The ⁸⁵Rb atoms are laser cooled and trapped in a magneto-optical trap.
For energy level determination experiment, atoms were optically excited to 32d₅/₂
Rydberg states. The two-atom process 32d₅/₂ + 32d₅/₂ → 34p₃/₂+30g is resonant at
an electric fi eld of approximately 0.3 V/cm through dipole dipole interaction. The
experimentally observed resonant fi eld, together with the Stark map calculation is
used to make a determination of the ⁸⁵Rb ng-series quantum defect to be ⵒg(n =
30) = 0.00405(6).
The ac Stark eff ect was also used to induce RET between cold Rydberg atoms.
When a 28.5 GHz dressing field was set at speci fic fi eld strengths, the two-atom
dipole-dipole process 43d₅/₂ + 43d₅/₂ → 45p₃/₂ + 41f was dramatically enhanced,
due to induced degeneracy of the initial and final states. This method for enhancing
interactions is complementary to dc electric- field-induced RET, but has more
flexibility due to the possibility of varying the applied frequency. At a dressing field
of 28.5 GHz all of the participating levels (43d₅/₂, 45p₃/₂ and 41f) show signi cant
shifts and these give a complicated series of resonances. An oscillating electric
fi eld at 1.356 GHz was also used to promote the above RET process where the
atoms are initially excited to the 43d₅/₂ Rydberg states. The ac fi eld strength was
scanned to collect RET spectra. Di fferent resonances were observed for diff erent
magnetic sublevels involved in the process. Compared to the higher dressing field
frequency of 28.5 GHz, the choice of dressing frequency of 1.356 GHz, which is
slightly blue detuned from the 41f - 41g transition, and structure of the spectra
may be understood, by analogy with the dc field case.
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ENHANCEMENT OF RYDBERG ATOM INTERACTIONS USING DC AND AC STARK SHIFTSBohlouli-Zanjani, Parisa January 2010 (has links)
This thesis reports the use of both dc and ac electric fi eld induced resonant
energy transfer, RET, between cold Rydberg atoms as a useful tool for enhancement
of interatomic interactions. A general technique for laser frequency stabilization and
its suitability for Rydberg atom excitation is also demonstrated.
RET between cold Rydberg atoms was used to determine Rydberg atom energy
levels. The ⁸⁵Rb atoms are laser cooled and trapped in a magneto-optical trap.
For energy level determination experiment, atoms were optically excited to 32d₅/₂
Rydberg states. The two-atom process 32d₅/₂ + 32d₅/₂ → 34p₃/₂+30g is resonant at
an electric fi eld of approximately 0.3 V/cm through dipole dipole interaction. The
experimentally observed resonant fi eld, together with the Stark map calculation is
used to make a determination of the ⁸⁵Rb ng-series quantum defect to be ⵒg(n =
30) = 0.00405(6).
The ac Stark eff ect was also used to induce RET between cold Rydberg atoms.
When a 28.5 GHz dressing field was set at speci fic fi eld strengths, the two-atom
dipole-dipole process 43d₅/₂ + 43d₅/₂ → 45p₃/₂ + 41f was dramatically enhanced,
due to induced degeneracy of the initial and final states. This method for enhancing
interactions is complementary to dc electric- field-induced RET, but has more
flexibility due to the possibility of varying the applied frequency. At a dressing field
of 28.5 GHz all of the participating levels (43d₅/₂, 45p₃/₂ and 41f) show signi cant
shifts and these give a complicated series of resonances. An oscillating electric
fi eld at 1.356 GHz was also used to promote the above RET process where the
atoms are initially excited to the 43d₅/₂ Rydberg states. The ac fi eld strength was
scanned to collect RET spectra. Di fferent resonances were observed for diff erent
magnetic sublevels involved in the process. Compared to the higher dressing field
frequency of 28.5 GHz, the choice of dressing frequency of 1.356 GHz, which is
slightly blue detuned from the 41f - 41g transition, and structure of the spectra
may be understood, by analogy with the dc field case.
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