Electric dipole

The proton-deuteron (pd) radiative capture reaction significantly impacts primordial nucleosynthesis. Employing a phenomenological potential model, we analyze pd radiative capture at energies below 300 keV, emphasizing electric dipole (E1) transitions.

9p visergeyne 18-06-2024 2 0   Download

The aim of this thesis is investigate and design a small antenna which can be embedded onto a Polyethylene substrate (used for making roof tiles). The antenna can be used to harvest ambient energy by connecting it to a rectifier. Due to the dimensional constraints of a roof tile as well as the materials used, there are limitations imposed on the antenna size, and thus the radiation efficiency and bandwidth often become a limiting factor in the overall performance of the system.

93p runthenight04 02-02-2023 9 1   Download

The (E)-2-(2-hydroxystyryl)quinolin-8-ol (abbreviated as HSQ) molecule was synthesized and characterized. The ESIPT, solvatochromism properties, electronic structure, and ground and excited electric dipole moments of this molecule were measured using absorption and fluorescence spectra recorded in 13 different solvents. Its electronic structure via electronic transitions was investigated to find the quantitative values of solvatochromism properties by LSER calculations. The ESIPT mechanism was clarified; ground and excited dipole moments were determined using solvatochromic shift methods.

19p tudichquannguyet 29-11-2021 6 1   Download

Dy3+ doped lithium-sodium aluminoborate glass (60-x) B2O3-10Al2O3-15Na2O-15Li2O-xDy2O3 (ABLN: Dy3+) are prepared by the conventional melting procedure. Optical absorption and luminescence spectra have been measured at room temperature. Using the Judd - Ofelt (JO) theory, the intensity parameters Ωλ (λ = 2,4,6) have been evaluated for ABLN: Dy3+ glass. These intensity parameters are used to predict radiative properties that include electric (Sed) magnetic (Smd) dipole line strength, radiative transition probabilities (AR), lifetime (τR), branching ratios (βR) for the excited levels of Dy3+.

8p nguaconbaynhay12 01-06-2021 9 2   Download

In this paper, source is considered as a single equivalent dipole and genetic algorithm, an efficient and robust optimization method, is proposed to estimate parameters of source. Some improvements are introduced to enhance performance of conventional genetic algorithm.

12p larachdumlanat127 20-12-2020 12 1   Download

PVA/CuI polymer composite samples have been prepared and subjected to characterizations using FT-IR spectroscopy, DSC analysis, ac spectroscopy and dc conduction. The FT-IR spectral analysis shows remarkable variation of the absorption peak positions whereas DSC illustrates a little decrease of both glass transition temperature, Tg, and crystallization fraction, v, with increasing CuI concentration. An increase of dc conductivity for PVA/CuI nano composite by increasing CuI concentration is recoded up to 15 wt%, besides it obeys Arhenuis plot with an activation energy in the range 0.54–1.

8p kethamoi1 17-11-2019 16 2   Download

According to the antenna theory, a linear antenna and an electric dipole are the two different concepts. An electric dipole is the primary radiation element with simple characteristics, and a linear antenna is an antenna commonly used in telecommunication systems of which properties depends on the size.

5p vidoraemon2711 04-06-2019 17 2   Download

The mechanism of this phenomenon is attributed to the f-f intersaction for either Tb3+/Sm3. The ABL:Tb, Sm glasses can produce color emission from green to red by properly tuning the relative ratio between Tb3+ and Sm3+.

8p vixyliton2711 17-04-2019 27 0   Download

LaF3 nanocrystals doped with different concentrations of Eu3+ ions were synthesized by hydrothermal method. The XRD, luminescence and excitation spectra have been studied at room temperature. The ratio of the 5D0→7 F2 electric dipole transition intensity to the 5D0→7 F1 magnetic dipole transition intensity (R) was used to evaluate the asymmetry of Eu3+ site. JuddOfelt parameters were calculated from emission spectra and were used to predict the radiative properties of 5D0→7 FJ transitions also the lifetime of 5D0 level.

8p cumeo3000 01-08-2018 30 0   Download

Lecture Engineering electromagnetics - Energy and potential include all of the following content: Moving a point charge in an electric field, the line integral, potential difference and potential, the potential field of a point charge, the potential field of a system of charges, potential gradient, the dipole, energy density in the electrostatic field.

58p youcanletgo_04 17-01-2016 37 1   Download

Orbis Scientiae 1999 constitutes the 28th conference on High Energy Physics and Cosmology that were begun in 1964. It has now become an institution by itself under the aegis of which the physicists convene annually in South Florida. It created a Belle Époque in Coral Gables. The series of Orbis Scientiae started with the participants of highest distinction in physics of the 20th Century. After its first two decades the conferences have been placed in the hands of younger and promising physicists....

253p kinhdo0908 11-10-2012 46 5   Download

Photons interact with matter because matter contains electric charges. The electric field of light exerts forces on the electric charges and dipoles in atoms, molecules, and solids, causing them to vibrate or accelerate. Conversely,

37p doroxon 18-08-2010 87 9   Download