Scattering Definition and 821 Threads

Homework Statement A parallel beam of alpha particles with fixed kinetic energy is normally incident on a piece of gold foil. a) if 100 alpha particles per minute are detected at 20 degrees, how many will be counted at 40, 60, 80 and 100 degrees? b) If the kinetic energy of the incident...

Hi all. Any someone recommend an introductory text on Inverse Scattering Transform and about solitons? I am currently using "Solitons and Inverse Scattering Transform" by Segur nd Albowtiz, which I think is too advanced for me, an engineering student.

I have done a little research on the internet and I would like to ask my concept is correct or not. 1) Sky is blue As the effect of rayleigh scattering is more effective for shorter wavelength, blue light scatter more than others (e.g. red). Furthermore, our eyes are more sensitive to blue...

1. Question A cubic crystal of interatomic spacing of 0.24 nm is used to select gamma–rays of energy 100 keV from a radioactive source containing a continuum of energies. If the incident beam is normal to the crystal, at what angle with respect to the incident beam do the 100 keV...

Homework Statement I need to derive the Compton scattering formula using Newtonian mechanics, I have it done in relativistic mechanics but can't get the Newtonian version. Homework Equations the solution to the relativistic equation is 1=mc^2(1/E2-1/E1)+cos(theta) for Newtonian...

Homework Statement n a Rutherford scattering experiment a target nucleus has a diameter of 3.5 10-14 m. The incoming has a mass of 6.64 10-27 kg. What is the kinetic energy of an particle that has a de Broglie wavelength equal to the diameter of the target nucleus? Ignore relativistic...

Hello I have trouble understandig nuclear reactions. Does anyone know some good scattering applets on a potential(of arbitrary shape;not 1D). I am interested also in discussing partial wave expansion. And if there exists an applet to show me how can I approximate a plane wave with...

Homework Statement To study the structure of the lead nucleus, electrons are fired at a lead target. Some of the electrons actually enter the nuclei of the target, and the deflection of these electrons is measured. The deflection is caused by the charge of the nucleus, which is distributed...

Hallo I don't understand why I can't use Δλ = λ'- λ = h/(m·c) · ( 1 - cos φ ) and ΔE = h · c / Δλ for getting the energy ΔE which is transferred to the electron In school we did it like this: 1/f'- 1/f = h/(m·c) · ( 1 - cos φ ) <-> E' = hf' = hf/(1 + hf(1 - cos φ )/(mc^2))...

I am asked to find the maximum KE value of the recoiling electron involved in a Compton scattering situation. Obviously, the maximum final Kinetic Energy of the electron would result when as much momentum as possible is imparted on the electron as a result of the collision. If the incident...

What equipment Compton used to measure the wavelenght shift in your experiment ? Some links talk about the use of bragg spectrometer others about the use of ionization chambers. In this link have some illustrations of spectras resultants of Compton experiments...

For my diploma thesis I must provide a calculation that reproduces the results given on page 46 of the paper hep-ph/0309342 . For those who do not want to look it up, I briefly explain what it is about: It concerns the two-body scattering processes (1) N + V => L + H, (2) N + L => V + H, (3) N...

Hey all, I am currently revising for my Physics mock but i can't get my head around high energy electron scattering, and the proof this provides for the size of the nucleus. I have read from a variety of texts and some of the links on here but these have lead me to become even more...

Homework Statement The energy E and momentum P of a relativistic electron and energy ε and momentum p of a photon are related by: E^2 - P^2c^2 = m_{e}^2c^4 and \epsilon = pc let E_{i}, P_{i} and E_{f}, P_{f} denote the inital and final energies and momenta of the electron, and let...

Homework Statement Which of the following forces is responsible for the scattering of an alpha particle by a gold atom in the Geiger-Marsden experiment? A. electrostatic force between the alpha particle and the electrons of the gold atom B. Electrostatic force between the alpha...

A scattering of light particles from a heavy stationary particles, the momentum of the light particles change direction after scattering, and we could use Born approximations. We also take that the initial momentum and the final momentum has the same magnitude. But how could it be when total...

How can I compute the differential scattering cross section \sigma (\theta) d \theta for scattering in the central potential V(r) = \frac{k}{r^2} using classical mechanics?

I was asked question: "Why in case of photoelectric effect electrons closer to the atom are ejected and in case of Compton effect electrons in the outer shells are emitted from nucleus by x-ray photon?". Well I know that this topic is very deep and one has to carefully select words to explain...

Why are electrons elastically scattered at very small angles but not large angles?

What is high energy electron scattering?

Does Compton Scattering change the phase velocity of the incident light?

i am going to write a report about photon scattering, and i still do not familiar about the concept of how many embranchment of it i have to write about, if anyone can tell me any information about it that could be great help to me,then i appreciate to the people who help me here!

Lead nucleus has charge = +82e and raadius R = 7.10*10^(-15) m permittivity of free space = 8.85*10^(-12) C^2/Nm^2 magnitude of charge on electron e = 1.60*10^(-19) C mass of electron = 9.11*10^(-31) kg find the acceleration 4R from the center of the lead nucleus. how do i do this...

I learned a lot from the discussion of the converse problem, photon absorption. What about this case? Perfectly elastic.

Hi everyone, could anyone give me a hint on Goldstein derivation 3.4? Starting from \theta = \pi - 2 \int_{r_{m}}^{\infty} \frac{s / r^{2} dr}{\sqrt{1 - V(r)/E - s^{2}/r^{2}}} they do a change of variables to get \theta = \pi - 4 s \int_{0}^{1} \frac{\rho d\rho}{\sqrt{r_{m}^{2} (1...

http://img168.imageshack.us/my.php?image=fundn7.png d(chi)/dt =l/(mr^2), I don't see how to get there if you use the definition of angular momentum, you get l=r x mv(vectors where appropriate) so you can write v as v=dr/dt*r + rdx/dt*x where x is the symbol chi(close enough)and that r...

hi, in neutron scattering, if the lowest kinetic energy of a neutron is increased by a factor of 2, how do you work out the number of peaks produced? I have worked out the lowest kinetic energy for a beta-brass CuZn to be 2.37meV using [tex]E=\frac{\hbar^{2}k^{2}}{2m}[\tex] where...

How do you use a beam current in rutherford scattering? Is it related to the intensity? All the book's questions and reading talks about is intensity, briefly, but the teacher's giving beam current. Thanks!

There is a good review article on inelastic neutron scattering experiments and results on hole-doped cuprate superconductors. One of the authors (Tranquada) was the first person to report experimentally on the possible existence of the stripe phase in such a compound using the same technique...

Im not too clear on how the scattering process may be used to probe the excitaion structure of the nucleus. Can anyone explain this to me or direct me to somewhere in which i can read about it? Cheers

How do I find the endpoint energy for photons when an .75 MeV electron beams stops inside a tungsten target? I just don't understand how to solve it without the scattering angle.:confused:

if the compton wavelength shift is in scattering an electron is 0.29 pico-m, what is the photon scattering angle? (you make take T=600K) I don't know why I was told the that T=600K? \Delta \lambda= \frac{h}{mc} (1-cos\theta) \frac{h}{mc}=0.00243 nm 0.119341564=1-cos\theta...

I'm working on a problem in which I'm asked to find the ratio of alpha particles scattering at any angle (assuming equal numbers of scattering nuclei per unit area) now I realize that nt = scattering nuclie per unit area. Does this mean that the above restriction sets nt to 1? Wondering...

I'm working out a problem from a text concerning the scattering of monochromatic light by free electrons (Compton effect) which asks me to derive expressions for the wavelength shift, electron momentum, and electron scattering angle in terms of the photon scattering angle assuming that the...

Just a quick question here. On page 43 of this link http://www.physics.gla.ac.uk/Physics4/2004-5/P4H_SSPI_complete.pdf Why is the distance AP = k/|k|.r and similarly for OB :confused: :confused:

An alpha particle approaches a Au (gold) nucleus with atomic mass number 197 with a speed of 1.5*10^7 m/s. The alpha particle is then scattered 49 degrees from the horizontal at the slower speed of 1.47*10^7 m/s. In what direction does the Au nucleus recoil below the x-axis (the horizontal)...

Suppose you have an unknown atom and you shoot an alpha particle at it in a nebula chamber. Then you measure the scattering angles of the alpha particle and the atom. You see they scatter in perpendicular directions. The problem is now to determine the mass of the unknown atom. The first...

i'm interested in physics, but i don't major in it... i look at physics in my free time, and i just came across the rutherford scattering formula and was wondering is it necessary to memorize it?

If a beam of electrons pass through a plane where the potental energy abruptly increases but not enough to classically stop the electrons, some of the beam will reflect. Was this affect, or anything like it, ever observed before it was explained by the wave model?

Hi all, we're looking at scattering theory in the QM course right now, and I've got a question concerning the approximative ways of calculating the phase shift \delta_l of the partial waves in the partial wave expansion of the scattered wave. One way (the semi-classical) to calculate it is...

Could anyone tell me what the difference between Q-spacing Bragg-spacing D-spacing and repeat distance is? I've always thought that they were same, but seemingly not? What is the realtionship, what is Q? Its keeping me up at night!

bragg spacing? how does it differ from d-spacing? and where does q fit in? And finally are all of these directly related to the repeat distance?

Electron scattering question... This question is from an 'A' level exam paper from June 2003: ----------------------------- Here are some facts about the scattering of a beam of high energy electrons from a sample of Protons: A - most of the electrons in...

If the maxmimum energy imparted to an electron in Compton scattering is 45 keV what is the wavelength of the incident photon? So a compton scattering happens and the energy is 45 keV and I need to find the wavelength of the photon incident to this electron. I think I need to use Lambda =...

http://arxiv.org/PS_cache/gr-qc/pdf/0502/0502036.pdf Particle scattering in loop quantum gravity Leonardo Modesto and Carlo Rovelli Centre de Physique Th´eorique de Luminy, Universit´e de la M´editerran´ee, F-13288 Marseille, EU (February 9, 2005) We devise a technique for defining and...

For some reason I don't feel like I was given all of the information on this question: A proton at rest is struck by a photon in a Compton collision. If the recoil kinetic energy of the proton is 4.5 MeV, what is the minimum energy of the incident photon (in MeV)? (Take the mass of the proton...

A) While reproducing the Rutherford scattering experiment in an advanced laboratory class, a student uses a gold foil with thickness 16.7 nm. The radioactive source emits a particles at 10.50 MeV, and the detector is placed at 24.5 cm from the target foil. What fraction of the a particles is...

new today http://arxiv.org/abs/gr-qc/0502036 Particle scattering in loop quantum gravity Leonardo Modesto, Carlo Rovelli 4 pages "We devise a technique for defining and computing n-point functions in the context of a background-independent gravitational quantum field theory. We...

Calculate the Rutherford cross section for a 10 MeV alpha particle scattered at firstly an angle greater than 90 degrees and secondly for an angle greater than 10 degrees. What does the relative magnitudes tell you in relation to the probabilities of the momentum transfer at large and small...

Hi everyone, Have anyone ever seen a paper on "Depolarization and Scattering of Electromagnetic Wave form Moving Surface with Roughness" or something relevant? I'll be thanks if give me a reference. Cheers