Scattering Definition and 919 Threads

what is the physical meaning of the scattering length of neutrons? What does mean -ve scattering length( for instance for 'H' !)?? :smile: :smile:

Any ideas how to do this question ? In a Compton type experiment X-rays scattered through 90 degrees suffered one percent reduction in energy.What was the incident energy of the X-rays ? You can assume that the electron coiled non-relativistically. Any help would be really appreciated ...

Okay, so the question is an electron of energy 100 MeV collides with a photon of wavelength 3x10^(-3) m (ie: the CMB). What is the maximum energy loss of the electron? After doing a few derivations for formulae, I came up with this one at work...could someone please let me know if there is...

To back me up with some of my chemistry courses this year, I picked up a quantum mechanics book that looked like it included some fairly simple introductions to quantum principles. However, in the first chapter it used Compton scattering, the lowering in wavelength of X rays due to collision...

I'm stuck with these questions. Please help if you can. In Rutherford's experiment, alpha-particles were directed at a thin gold foil. A small fraction of the alpha-particles were back-scattered. Explain how this result would be affected if each of the following changes was (separately)...

When a beam of electrons (near relativistic or non-rel.) intersects with a beam of protons or a "fixed" proton target, what percentage of the electrons tunnel through the proton(s) or is there an absence of electrons on the exact opposite side (the backside) of the proton? This question is a...

The Compton scattering effect (1923) seems to be the main evidence that light has a particle-like behavior. What are the other effects that indicate that light has a particle-like behavior? If there are no other effects that indicate that light has a particle-like behavior, and if we find an...

I know scattering would give polarized light on the in 90 degree of the beamdirection, but...how about somewhat "multiple scattering" ?? how it affect the polarization ?? the concept of multiple scattering far too difficult for me, can any guy explain that to me pls?? :eek: Thx

Here I go again, Problem: Suppose we have a particle of mass m moving with speed v that collides with another particle of mass M which is initially at rest. Show that the scattering angle of m after collision can be anywhere between 0 and 180 degress if m < M. Determine the maximum scattering...

Time has come for me to do my master thesis project, and Photon-Photon scattering is a hot candidate! Right now I'm just trying to get into the subject, and would be really happy if someone who knows about this could help me. I am familiar with basic quantum mechanics, and am right now studying...

this came out April 5, 2004 http://arxiv.org/hep-th/0404039 "String Scattering from Decaying Branes" Vijay Balasubramanian, Esko Keski-Vakkuri, Per Kraus, Asad Naqvi Abstract: "We develop the general formalism of string scattering from decaying D-branes in bosonic string theory. In...

this paper discusses how to make a black hole bomb taking profit of a phenomenon known as superradiant scattering http://arxiv.org/abs/hep-th/0404096

The question is: 19.5.4 Show that the s-wave phase shift for a square well of depth V0 and range r0 is δ0 = -k r0 + tan-1{(k/k') tan(k'r0)} where k' and k are the wave numbers inside and outside the well. For k small, kr0 is some small number and we ignore it. Let us see what happens...

Example 2.9 in Serway's Modern Physics, 2nd ed., asks Why are x-ray photons used in the Compton experiment, rather than visible light photons? To answer this question, we shall first calculate the Compton shift for scattering at 90o from graphite for the following cases: (1) very high energy...

Ok, so we have a potential energy V(r)= -C/r^4 which exists between an atom and ion at distances greater than contact. Note that C=e^2/2(P^2) where e is charge of ion and P is polarizability of atom. I have to calculate the cross section for an ion of velocity v to strike an atom, while assuming...

I am not sure this is the right topic for these questions. They are for the people who are familiar with Compton scattering. Let \Theta be the angle that the trajectory of the scattered photon makes with the trajectory of the incident photon. Suppose \Theta is zero. Does that...

I've worked out the scattering of a photon off an atom. Now I'm trying to figure out how I can use the same formulas to figure out scattering off a material. Suppose you have a light photon incident normal to a piece of glass. Classically it should go straight through or get reflected straight...

I'm having problems with some of the more advanced questions about Rutherford Scattering and the Gieger-Marsden experiment. Can anyone suggest somewhere online where I can read up on this and that explains it well. One question that bugged me was this: use Rutherford scattering...

Hello all, Can anyone explain to me which electrons contribute in compton scattering? -Only free electrons; -Free electrons and weakly bounded to atoms; -All atomic electrons and free electrons According to Klein-Nishina formula, photons scatter with all atomic electrons; becouse the...