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Free energy and surface tension of arbitrarily large
Free energy and surface tension of arbitrarily large

... stable for still larger clusters3 (n'10 5 ). Herein we build on such results to predict the free energy of arbitrarily large Mackay icosahedra. This allows us to predict chemical potential m (n) for arbitrarily large clusters. Since the slope of m with respect to x5n 21/3 gives the surface tension a ...
The flame ionization detector: A theoretical approach
The flame ionization detector: A theoretical approach

rate law determination of crystal violet hydroxylation
rate law determination of crystal violet hydroxylation

... message: “Waiting….seconds for lamp to warm up.” (The minimum warm up time is one minute.) Note: For best results, allow the spectrometer to warm up for at least three minutes. Insert the blank cuvette (filled with deionized water) in the sample compartment. This step will remove any background abso ...
Vacuum-ultraviolet to infrared supercontinuum in hydrogen
Vacuum-ultraviolet to infrared supercontinuum in hydrogen

... Fig. 1. Experimental setup. (a) A kagomé-PCF is filled with hydrogen using a pair of gas cells with MgF2 windows. Ultrashort few-microjoule pulses are launched into the fiber using an achromatic lens. Two chirped mirrors compensate for pulse lengthening in air. (b) Diagnostics. Upper, the VUV spectr ...
Paper
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... sound in order to increase G and also the overlap time between the two source waves. Under these circumstances, the thickness of the shell jDkj becomes close to its radius, accounting for the uniform background of scattered atoms rather than the thin s-wave halo observed in Ref. [8]. For velocities ...
The Magic of Matter Waves Wolfgang Ketterle
The Magic of Matter Waves Wolfgang Ketterle

... optical laser that is based on the amplification of light. When Ketterle’s research team developed the atom laser in 1997, the atomic amplification process happened during the formation of the Bose-Einstein condensate. Since then, people have questioned whether atoms can be amplified the way light p ...
MOS (metal-oxide- semiconductor)
MOS (metal-oxide- semiconductor)

... Oxide-trapped charge Qot Oxide-trapped charge are associated with defect in the silicon dioxide. These charges can be created, for example, by X-ray radiation or high – energy electron bombardment the trap are distributed inside the oxide layer. Most of process-related oxidetrapped charge can be re ...
In the early 1930s, the relativistic electron
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... formulae for virtual processes. The pole occurs when k2 = 0” (Feynman, 1949b, p. 781). Another aspect of the description of scattering in quantum electrodynamics is that there really is no temporal description of the interaction in spite of the fact that in the formula there are contributions from p ...
Problem Set 11 Solutions - Illinois State Chemistry
Problem Set 11 Solutions - Illinois State Chemistry

... For Si, placing two electrons in the 3p set of orbitals leads to two unpaired electrons. Thus, the total spin of the two unpaired electrons is S=1, and therefore the multiplicity is 2S+1 = 2·1+1 = 3. Therefore, the multiplicity of the ground state of Si is a triplet. For P, placing three electrons i ...
Visible Light, Wide-Angle Graded Metasurface for Back Reflection
Visible Light, Wide-Angle Graded Metasurface for Back Reflection

... wide collection aperture this surface may reflect nearly all of the impinging energy back to the source. Another interesting application of this surface might be replacing the diffusive retroreflective tapes (over a limited angle), as the efficiency of reflection is significantly larger than available refle ...
Grade 8 th Science Curriculum Scope and Sequence
Grade 8 th Science Curriculum Scope and Sequence

... Balance simple chemical equations to satisfy the Law of Conservation of Matter. d. Give reasons to justify the statement, “ If the number of atoms stays the same no matter how the same atoms are rearranged, then their total mass stays the same.” ...
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Ch 2 ppt - Houston ISD
Ch 2 ppt - Houston ISD

... Atomic Number and Atomic Mass • Atoms of the various elements differ in number of subatomic particles • An element’s atomic number is the number of protons in its nucleus • An element’s mass number is the sum of protons plus neutrons in the nucleus • Atomic mass, the atom’s total mass, can be appro ...
Ref. “Optical Materials”
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... It is also a collaboration between Lehigh University and Penn State University. "To focus, coordinate and promote educational and research activities across the globe to introduce new functionality in glass" ...
The Noble Gases
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... solidified at extremely low temperatures, due to weak (induced) van der Waals forces between the atoms, e.g. neon freezes at -249oC, helium at -270oC. The larger the atomic mass, the lower the freezing temperature (as the van der waal’s forces are stronger between larger atoms with more electrons to ...
Effect of Gas Flow Rate on The Electron Temperature
Effect of Gas Flow Rate on The Electron Temperature

... electron densities for same conditions of gas flow rate and microwave power showed increasing when flow rates increasing, both Figs.3 and 4 illustrate that’s behavior of electron temperatures and electron densities with the gas flow rate. This behavior can be interpreted as follows: when the gas flo ...
software development life cycle
software development life cycle

... The work towards a silicon-based emitter is ongoing but still far from nature. Until an efficient, reliable silicon based light source is available, a photonic integrated system will need to use a conventional III-V material light emitter. ...
A Laser Module for 100Gbps Digital Coherent Optical Transmission System
A Laser Module for 100Gbps Digital Coherent Optical Transmission System

... highly stable DFB (distributed feedback) LD. The light emitted from the front side (output side of the laser module) of the wavelength tunable LD passes through a lens where it is coupled to the optical fiber. The light emitted at the rear side (opposite side) enters the rear-side wavelength monitor ...
VUV photochemistry of small biomolecules
VUV photochemistry of small biomolecules

... grating mounted on a 10 m focal length monochromator at the U125/2 undulator beamline). Generally, high resolution measurements can be necessary (a) if the data are to be incorporated into photochemical models since the solar Lyman-a emission is also very narrow (0.1 Å), but also (b) for exploring ...
From the Photon to Maxwell Equation. Ponderations on the Concept
From the Photon to Maxwell Equation. Ponderations on the Concept

Introductory quantum mechanics
Introductory quantum mechanics

Experiment 4: Refraction and Interference with Microwaves
Experiment 4: Refraction and Interference with Microwaves

... and the transmitted ray is moving just parallel to the interface. If we increase θ1 still further, a rather remarkable thing happens, and it is called, appropriately enough, total internal reflection. The interface now acts like a perfect mirror, and simply reflects all of the incident energy back i ...
Optical Studies of Materials for Spectral Design Christina ˚ Akerlind
Optical Studies of Materials for Spectral Design Christina ˚ Akerlind

... (IR), and some birds and beetles have vision sensitive to optical polarization [4]. Artificial receptors, here called sensors, also have a wavelength dependent sensitivity. Polarization sensitive sensors are common in radar range (RR) applications, but still rare in IR. It is however suggested that ...
Chemistry 11 – Course Review
Chemistry 11 – Course Review

Unit 2 Lecture Outline
Unit 2 Lecture Outline

... Molecular geometry describes the three-dimensional arrangement of atoms in a molecule. Molecular geometry is an important factor in determining physical and chemical properties of molecules as well as reactions molecules will or will not undergo. For simple molecules molecular geometry can be predic ...
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X-ray fluorescence



X-ray fluorescence (XRF) is the emission of characteristic ""secondary"" (or fluorescent) X-rays from a material that has been excited by bombarding with high-energy X-rays or gamma rays. The phenomenon is widely used for elemental analysis and chemical analysis, particularly in the investigation of metals, glass, ceramics and building materials, and for research in geochemistry, forensic science and archaeology.
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