Scattering Definition and 820 Threads

Hi, I'm not sure how to do B1 part c, can anyone help? http://qm-web.library.qmul.ac.uk/exams/science/physics/2010/PHY-215.pdf

does anybody know a book, where the compton-scattering with respect to the initial photon-polarisation is calculated? (beside landau-lifschitz-berestetzki)

Homework Statement Ok, I'm given a formula for the cross section of the scattering and I've been told that the detector is a column of water of depth 10m. I need to find the probability of the scattering within the detector. Homework Equations σ = E(in MeV) x 1.5x10-44 cm2 The...

Hi, I had an issue with compton scattering that I never received a satisfactory answer for. My issue was that after the collision, there exists a y component of momentum... but all diagrams of the compton effect align the axis center to center from the photon to the electron and on top of...

Is there any user on this forum who have used the SAXSess? please reply to this post. I need some discussion.

Homework Statement A thin polycrystalline film of Cu, with lattice parameter of 0.361 nm, is irradiated with X-rays with wavelength of 0.154 nm. Calculate the first 5 bragg scattering angles for which X-rays may be detected.Homework Equations 2dsin(\theta) = n\lambda Bragg condition for...

Hi How is it possible for a homogeneous molecule (i.e. one not having a permanent dipole moment and hence not IR active) to be Raman active? What my confusion is that since we cannot excite any states in the molecule (since it is IR inactive), then how can any scattering process even occur...

What Does "Quantum Gravity Scattering Amplitudes" Mean? I've seen it referenced in a few papers but I can't seem to find a definition. I know what "scattering amplitudes" means but don't understand the relationship with quantum gravity. What precisely is doing the scattering in quantum gravity?

Homework Statement Assuming that in electron scattering off a target proton you need to resolve a distance scale below R = 10^-15 m (that is, the uncertainty in the proton’s position is no larger than about 10^-15 m), determine a condition on the electron momentum, and justify it in one or...

I know that the sky appears blue because the blue light gets scattered the most due to its high frequency(according to Raleigh's law) but then during the sunset or sunrise, why does the sky appear red? Doesn't almost all of the blue light get scattered , and maybe just a small portion of red...

I don't quite understand why we see sunsets as red/orange/yellow. We see the sky as blue because Rayleigh scattering causes the smaller particles within the atmosphere to scatter bluer wavelengths and absorb others. But if the others are absorbed, which would include the red/orange/yellow...

hi how to calculate the traces of product of Dirac matrices in QED. i want caculate crossection of process scattering in QED. a program to calculate it

I am researching smart structures using optical fibre based sensors. One type used is distributed sensors of which there are two main kinds: ROTDR (Raman Optical time domain reflectometer) and BOTDR (Brillouin Optical time domain reflectometer). The former is based on Raman scattering within the...

I've been trying to get some insight into the light scattering mechanism that occurs in colloidal solutions via the Tyndall effect and was hoping some of the resident experts here could shed some light... on this. Tyndall scattering occurs with particles that are roughly the size of the...

i am reading about Rayleigh scattering in light and have come to understand that atoms absorb light of particular frequencies and then scatter it in different directions. But why do they scatter the light on the first place? Also, why do smaller atoms scatter higher frequency light?

I have some questions here regarding phase shift and scattering. 1). I am working out an exercise for my own benefit, for which I already have the solution, but there are parts of it I don't understand. I am given a scattering delta potential: b*delta(r - a), where b is a constant, and I am...

What is Nima talking about at 42 minutes? http://www.cornell.edu/video/?videoID=913&startSecs=0

Homework Statement A photon of energy E is scattered off a stationary electron with rest mass m. What is the maximum kinetic energy of the recoiling electron?Homework Equations \lambda'-\lambda=\frac{h}{mc}(1-cos(\phi)) E=\frac{hc}{\lambda}The Attempt at a Solution The maximum kinetic energy...

Can anyone explain why there is an inverse relationship between target to detector distance and scattering angle? Thanks.

Homework Statement Compton's derivation of his scattering formula: \delta \lambda \equiv \lambda' - \lambda = \frac{hc}{m_e c^2} (1 - cos\theta) assumed that that the target electrons were at rest. In reality, they are orbiting around nuclei. In a material like lead, the electrons have a...

Homework Statement Suppose a 0.511[MeV] photon from a positron-electron annihilation scatters at 110 degrees from a free electron. What are the energies of the scattered photon and the recoiling electron? Relative to the initial direction of the 0.511[MeV] photon, what is the direction of the...

hello there! your help is really appreciated. 1.For the Ruther alpha-particle scattering experiment, how come we are only concerned with the nucleus of the gold with repulsion on the alpha particle? what about the electrons in gold? Don't they attract the alpha particle? 2. To calculate...

I've been reading some of my old physics books and I'm currently reading about Compton scattering. It got me to thinking - is there is a minimum Compton scattering angle? Is there a point where it becomes highly unlikely (or impossible) for a photon to be Compton scattered?

Hi, I have a question about the divergence of forward Coulomb (Bhabha/Moller) scattering. I guess the classical analog of it is the Rutherford cross-section divergence, but that can be explained by the infinite impact parameter. In the QED version - the Bhabha/Moller scattering, it is...

Hi, I have a question about the divergence of forward Bhabha/Moller scattering. I guess the classical analog of it is the Rutherford cross-section divergence, but that can be explained by the infinite impact parameter. In the QED version - the Bhabha/Moller scattering, it is the matrix...

URGENT - Compton Scattering - Electron Momentum Homework Statement An x-ray photon of initial energy 1x10^5 eV traveling in the +x direction is incident on a free electron at rest. The photon is scattered at right angles into the +y direction. Find the components of momentum of the...

I am following advice from this page: http://www.phys.uu.nl/~thooft/theorist.html and I'm particularly puzzled by the following topics (in bold): Maxwell's laws in a medium. Boundaries. Solving the equations in: * vacumm and homogeneous medium (electromagnetic waves) * in a...

Can someone qualitatively explain the difference between Raman scattering, Rayleigh scattering, and Brillouin Scattering with respect to molecules? I attempt to define each below but would appreciate either affirmation I'm correct or correction if I'm wrong. Raman scattering - Molecules...

Hey folks, another question. What is the difference between hard and semi-hard scattering events? In terms of energy I found for both s >> t, so where does the difference lie? Thanks, Earth's

Hey folks, as said in the title: What is the meaning of "inclusive scattering" and "exclusive scattering"? Thanks, earth2

I just finished the first 4 chapters of Sakurai's Modern qm, and now I'm beginning to learn purterbation method and scattering theory, but from the feedback it seems that many people are quite unsatisfied with Modern qm on these parts. Could you guys recommand a nice book on perturbation and...

This came up when I was trying to explain how we receive light from decoupling era: I know that the CMB we are getting is from some Last Scattering Surface (LSS) and this surface is moving back in time in some sense. But the question is: will there come a time that we are past the decouping era...

Why does a light scatter when it interacts with a nitrogen molecule. I have read about Rayleigh and mie scattering , I was told that the photons are not getting absorbed and re-emitted by the nitrogen, So when i shoot photos into a jar of nitrogen why does it change the photons path , is...

Here are two exercises: 1. ) The proton radius is 0.8fm. What energy electron beam do you need for this resolution, if the target is liquid H2? 2.) A pion radius is 0,65fm. What energy pion beam do you need for this resolution by scattering on the electrons of a stationary target(pi-e...

in Schaum's Outline of Theory and Problems of Quantum Mechanics how did they got eq 15.5.7

Homework Statement What parts of the Compton Collision experiment can be explained using classical models and which require the "photon" model? Anyone can help me with this question?

is the sky blue because , blue light has more energy so it gets scattered to our eye, and red light has less energy so it gets scattered away from our eye , and when the sun sets the angle the light enters our atmosphere changes , is this similar to white light entering a prism and that...

[b]1. A photon of wavelength 1.000nm is scattered by a muon initially at rest. What is the deflection angle of the photon if its wavelength after scattering is 1.001nm? Homework Equations \lambda^{'} - \lambda = \frac{h}{mc} (1 - cos(\vartheta) Assume that the mass of the muon is 200 times...

what does it mean by scattering of light? (or electrons etc?) does it mean light is absorbed, and then re-radiated.(by eciting electrons to higher energy levels which then produce light when it falls back ownto the ground state) or that its something more like compton scattering? or is it to do...

I cannot figure out why there is a relative sign difference between the two diagrams for bhabha scattering. Fermi statistics is at play here but I don't see how that affects the relative sign between 2 different diagrams...

I cannot figure out why there is a relative sign difference between the two diagrams for bhabha scattering. Fermi statistics is at play here but I don't see how that affects the relative sign between 2 different diagram...

A quick question regarding compton scattering: if we consider the situation in which a photon incident on a free electron is scattered through an angle of 180 degrees, its energy essentially does not change. Since energy must be conserved, I assume this means there is no effect whatsoever on the...

I need a calculation section of the article without Compton scattering method does not use quantum field theory. Can you help me? I thank a lot!

In theory this is a simpel integral problem which i can't solve So I'm doing some plasma physics, and it comes with the derivation of the Thompson scattering (please bear with the first time I've tried using latex, I am sorry some of the greek lowercase laters look like superscripts, there not...

Hi there, I am learning the basics of QFT at the moment. Could someone explain to me, in the case for any number of scalar fields, the difference between correlation functions and scattering amplitudes please? Correlation functions <0|T(\phi_{1}...\phi{n})|0> Does one always write the...

Hi all. Here is the question: Compton scattering I understood is, any wavelength phton can kick an electron, hecnce change its momentum. However, I also learned in the electron phton absorbtion process, if the photon's energy smaller than the energy difference between the two states of the...

Hi, 1. I am studying dynamic light scattering in which one experimentally measures intensity correlation i.e., <I(t)I(t+tau)>. Therefore, if the detector looks at a scattering signal from a solution of particles undergoing Brownian motion, under right experimental conditions one can detect the...

hi all, I am facing a confusing problem with scattering theory and any hint would be greatly appreciated.. In the famous scattering by a square well problem the phase shift\delta is a smooth curve in the particle energy... but what I get from my own derivation is not exactly as it should be...

Homework Statement Integrate the rutherford cross section over the backward hemisphere to get 4pi(sigma0(E)) Homework Equations Rutherford cross section is sigma0(E)/sin^4(theta/2) The Attempt at a Solution When I integrate this with the limits pi/2 to pi i get sigma0(E)*(8/3) i...

Homework Statement A beam of 0.38 MeV neutrons is incident on a 113Cd foil of thickness 1mm. The absorption 48 cross-section for 0.38 MeV neutrons is 5 barns. What is the fraction of neutrons absorbed by the foil...