OPTI 511R, Spring 2015 Problem Set 10 Prof. E. M. Wright Due
... Doppler cooling utilizes the scattering force to remove kinetic energy from a gas of atoms via momentum removal from the atoms, thus cooling atoms. Consider an atom moving in the −kˆ direction, opposite to the propagation direction of a laser beam. The scattering force will push the atom in the +kˆ ...
... Doppler cooling utilizes the scattering force to remove kinetic energy from a gas of atoms via momentum removal from the atoms, thus cooling atoms. Consider an atom moving in the −kˆ direction, opposite to the propagation direction of a laser beam. The scattering force will push the atom in the +kˆ ...
Thermal neutron scattering
... Let us return for a moment to the wave-particle duality. When the particles have a high energy (for neutrons, E = 40 keV corresponds to h = 10-4 nm, by far shorter than the distances between atoms in matter), the corpuscular approach illustrated by the image of a shock between 2 billiard balls is pe ...
... Let us return for a moment to the wave-particle duality. When the particles have a high energy (for neutrons, E = 40 keV corresponds to h = 10-4 nm, by far shorter than the distances between atoms in matter), the corpuscular approach illustrated by the image of a shock between 2 billiard balls is pe ...
12Sept_Synergist Solutions article
... particles using focusing optics. The higher the concentration of particles, the higher the amount of light scattered from the particles. The resulting scattered light from the particles is collected by the collecting optics—an assembly of lenses or a mirror. The collecting optics transfer the colle ...
... particles using focusing optics. The higher the concentration of particles, the higher the amount of light scattered from the particles. The resulting scattered light from the particles is collected by the collecting optics—an assembly of lenses or a mirror. The collecting optics transfer the colle ...
MATERIAL SAFETY DATA SHEET
... CAS Registry Number COMPONENT None as defined by the OSHA Hazard Communication Standard 29 CFR 1910.1200. ...
... CAS Registry Number COMPONENT None as defined by the OSHA Hazard Communication Standard 29 CFR 1910.1200. ...
A Method to Produce Intense Positron Beams via Electro Pair
... show forward, interference and backward pieces, with α as fine structure constant, h̄ Planck constant divided by 2π, s, t, u Mandelstam variables and pe2cm c.m. momentum of beam e2. The total cross section, that means the integration of formula (9), diverges. How to go around the singularities in pr ...
... show forward, interference and backward pieces, with α as fine structure constant, h̄ Planck constant divided by 2π, s, t, u Mandelstam variables and pe2cm c.m. momentum of beam e2. The total cross section, that means the integration of formula (9), diverges. How to go around the singularities in pr ...
Optimal tuning of lasing modes through collective particle resonance
... pect that as the pumping intensity increases the lasing peaks will appear at different wavelengths, thus inhibiting a stable lasing mode. Based on the results inferred from Fig. 2, we will now concentrate on the R ⫽ 250-nm case for the resonance shown in Fig. 3. We shall now study if it is possible ...
... pect that as the pumping intensity increases the lasing peaks will appear at different wavelengths, thus inhibiting a stable lasing mode. Based on the results inferred from Fig. 2, we will now concentrate on the R ⫽ 250-nm case for the resonance shown in Fig. 3. We shall now study if it is possible ...
Theory of longitudinal magnetoresistance in weak magnetic fields
... field. In the equation for this increment, the expansion of the operator denominators gives rise formally to terms of first order in the magnetic field. But these make no contribution to the longitudinal electric conductivity, and we must continue this expansion to the second ~s*. It is easily seen ...
... field. In the equation for this increment, the expansion of the operator denominators gives rise formally to terms of first order in the magnetic field. But these make no contribution to the longitudinal electric conductivity, and we must continue this expansion to the second ~s*. It is easily seen ...
Amplitude and Phase of Tightly Focused Laser Beams in Turbid Media
... the total coherent field hEðj0 Þi= Wð0 Þ, obtained from the averaged sum of plane waves launched at and exiting at 0 , where Wð0 Þ is the total intensity exiting in the 0 direction. We also define an incoherent angular dispersion pffiffiffiffiffiffiffiffiffiffiffiffiffi function (IADF) determined by hjEðj0 Þji= Wð ...
... the total coherent field hEðj0 Þi= Wð0 Þ, obtained from the averaged sum of plane waves launched at and exiting at 0 , where Wð0 Þ is the total intensity exiting in the 0 direction. We also define an incoherent angular dispersion pffiffiffiffiffiffiffiffiffiffiffiffiffi function (IADF) determined by hjEðj0 Þji= Wð ...
Enpolarization and depolarization of light
... the random phasors sum [26]. It was recently shown that this phenomenological model is relevant for strongly scattering medium, such as an inhomogeneous bulk with high optical index variations or a rough surface with steep slopes or peak to valley heights larger than the wavelength. In accordance wi ...
... the random phasors sum [26]. It was recently shown that this phenomenological model is relevant for strongly scattering medium, such as an inhomogeneous bulk with high optical index variations or a rough surface with steep slopes or peak to valley heights larger than the wavelength. In accordance wi ...
PHY2505-Lecture9 - Earth, Atmospheric, and Planetary Physics
... Blackbody assumption for cloud If the cloud behaves as a blackbody, radiation from above and below would not be able to penetrate the cloud – it would behave like the Earth’s surface with emitted radiance from top and bottom surfaces given by the Planck function. ...
... Blackbody assumption for cloud If the cloud behaves as a blackbody, radiation from above and below would not be able to penetrate the cloud – it would behave like the Earth’s surface with emitted radiance from top and bottom surfaces given by the Planck function. ...
Experiments
... Compton scattering (incoh), photonuclear absorbtion (ph,n), pair production off nucleus (Kn), and pair production off electrons (Ke). Rayleigh scattering (coh) is the classical physics process where g’s are scattered by an atom as a whole. All electrons in the atom contribute in a coherent fashio ...
... Compton scattering (incoh), photonuclear absorbtion (ph,n), pair production off nucleus (Kn), and pair production off electrons (Ke). Rayleigh scattering (coh) is the classical physics process where g’s are scattered by an atom as a whole. All electrons in the atom contribute in a coherent fashio ...
Two electric field Monte Carlo models of coherent backscattering of
... these two points form a cosine angular diffraction pattern in the far field [Fig. 1(b) and Media 1]. In other words, the diffraction pattern is simply the 2D Fourier transform of the spatial pinhole distribution. In a tissuelike medium where light is multiply scattered, there are an infinite number ...
... these two points form a cosine angular diffraction pattern in the far field [Fig. 1(b) and Media 1]. In other words, the diffraction pattern is simply the 2D Fourier transform of the spatial pinhole distribution. In a tissuelike medium where light is multiply scattered, there are an infinite number ...
Introduction to Spectroscopic Methods ver.2
... A parallel beam of monochromatic radiation with power Po strikes the block perpendicular to a surface after passing through a length b of the material , which contains n absorbing particles , the beam’s power is decreased to P as a result of absorption. Consider now a cross-section of the block havi ...
... A parallel beam of monochromatic radiation with power Po strikes the block perpendicular to a surface after passing through a length b of the material , which contains n absorbing particles , the beam’s power is decreased to P as a result of absorption. Consider now a cross-section of the block havi ...
Q 2 - Jefferson Lab
... • Measured the cross section asymmetry between + and – electron helicity states in elastic scattering of a polarized electron on a polarized proton. • The systematic errors are different when compared to either the Rosenbluth technique or the polarization transfer technique. • The sensitivity to the ...
... • Measured the cross section asymmetry between + and – electron helicity states in elastic scattering of a polarized electron on a polarized proton. • The systematic errors are different when compared to either the Rosenbluth technique or the polarization transfer technique. • The sensitivity to the ...
Quantum Field Theory II
... this way we can determine the value of Y order by order in powers of g. Adjusting Y so that means that the sum of all connected diagrams with a single source is zero! In addition, the same infinite set of diagrams with source replaced by ANY subdiagram is zero as well. Rule: ignore any diagram that, ...
... this way we can determine the value of Y order by order in powers of g. Adjusting Y so that means that the sum of all connected diagrams with a single source is zero! In addition, the same infinite set of diagrams with source replaced by ANY subdiagram is zero as well. Rule: ignore any diagram that, ...
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... with various anisotropy factors g and with different reflecting boundaries. In a Michelson interferometer with a low coherence source, OPS combines the field coming from a reference mirror with the one backscattered from the diffusive medium. By tuning the optical length of the reference arm and det ...
... with various anisotropy factors g and with different reflecting boundaries. In a Michelson interferometer with a low coherence source, OPS combines the field coming from a reference mirror with the one backscattered from the diffusive medium. By tuning the optical length of the reference arm and det ...
Vaitkus-mobility-RD50 - Indico
... Classical effects, that works well in the classical situations, can be used for analyze conditions in the samples that are not traditional: irradiated-Si ...
... Classical effects, that works well in the classical situations, can be used for analyze conditions in the samples that are not traditional: irradiated-Si ...
How do electrons move in a gas
... Linear CO2 with an extra e- is instable (≪1 ps) and has negative affinity (VEA≈ -3.8 eV): low energy e- collisions cause dissociative attachment, producing O- but not CO2-. With an e- added, a bent structure (134º) is favoured. This has a long lifetime ( ≈ 90 µs) but still has a negative electron ...
... Linear CO2 with an extra e- is instable (≪1 ps) and has negative affinity (VEA≈ -3.8 eV): low energy e- collisions cause dissociative attachment, producing O- but not CO2-. With an e- added, a bent structure (134º) is favoured. This has a long lifetime ( ≈ 90 µs) but still has a negative electron ...
Polarization of light II
... beam will contain the s component only. In this experiment , you will study the variation of intensity as a function of angle of incidence for p as well s polarized light and will measure the Brewster angle for air and glass interface and hence refractive index for glass can be estimated from eq (5) ...
... beam will contain the s component only. In this experiment , you will study the variation of intensity as a function of angle of incidence for p as well s polarized light and will measure the Brewster angle for air and glass interface and hence refractive index for glass can be estimated from eq (5) ...
244061
... system with a numerical aperture of 0.85. The operating frequency is 700 nm. The results are plotted for spherical particles with radii 70 and 140 nm. The E x and E z components are plotted on the φ = π / 2 cut as a function of θ . For small spheres, the E x component has a maximum at θ = π / 2 . As ...
... system with a numerical aperture of 0.85. The operating frequency is 700 nm. The results are plotted for spherical particles with radii 70 and 140 nm. The E x and E z components are plotted on the φ = π / 2 cut as a function of θ . For small spheres, the E x component has a maximum at θ = π / 2 . As ...
Introduction to reaction dynamics
... we can go much deeper than this and study these elementary reactions in much greater detail. Reaction dynamics looks at chemical reactions on the scale of single reactive collisions between molecules, and involves carrying out experiments and calculations with the aim of understanding chemical react ...
... we can go much deeper than this and study these elementary reactions in much greater detail. Reaction dynamics looks at chemical reactions on the scale of single reactive collisions between molecules, and involves carrying out experiments and calculations with the aim of understanding chemical react ...
Cross section (physics)
The cross section is an effective area that quantifies the intrinsic likelihood of a scattering event when an incident beam strikes a target object, made of discrete particles. The cross section of a particle is the same as the cross section of a hard object, if the probabilities of hitting them with a ray are the same. It is typically denoted σ and measured in units of area.In scattering experiments, one is often interested in knowing how likely a given event occurs. However, the rate depends strongly on experimental variables such as the density of the target material, the intensity of the beam, or the area of overlap between the beam and the target material. To control for these mundane differences, one can factor out these variables, resulting in an area-like quantity known as the cross section.