2021年6月25日 · Coherent scattering is necessarily elastic, but elastic scattering is not necessarily coherent.. Elastic scattering means no loss of energy, whereas coherent scattering implies preservation of coherence, i.e., the phase of scattered wave is related to that of the incident wave. E.g., if the two waves were made interfere, or if two scattered waves are made …

2020年4月13日 · Reflection is a form of scattering, but it is coherent scattering. When scattering occurs from a lot of identical particles rigidly fixed in a plane, then all the possible ways a single photon can be scattered from the plane of particles are fixed in phase. That is coherent scattering, and it is reflection.

2024年8月30日 · From my understanding, a neutron scattered in an inelastic scattering event, will always be scattered in a random direction. If this is the case, it seems that any form of interference would be impossible. However, I have come across the concepts of both coherent and incoherent inelastic scattering.

Rayleigh scattering is the elastic scattering of a photon off an entire atom. Thomson scattering is the elastic scattering of a photon off a single unbound electron. Both are more likely to happen at lower energies. In particular, Rayleigh scattering cross section depends on the inverse square of initial photon energy.

2017年10月22日 · For a small percentage of elastic scattering, depending on the energy and the type of mass on which neutrons scatter, there is a probability of scattering backwards, see here for example. For the setup described in the link you give, the small angle elastic scatters are chosen because the phases are known (coherent) , so there can be a ...

$\begingroup$ I don't work with MD, but in light-scattering the ISF is equal to the electric field auto-correlation function from a system of fluctuating Brownian particles. For an ergodic system, the idea is that the particle positions will shift roughly the same over a certain delay time.

Let us treat the "coherent" part first. Neutrons scatter off nuclei, and the strength of the scattering thus depends not only on atomic number, but also which isotope we are dealing with. If one of the elements in our sample has two or more common isotopes, these isotopes will be randomly distributed throughout the crystal, since the chemistry ...

2021年12月28日 · What is the meaning of coherent elastic in "coherent elastic neutrino-nucleus scattering"? What I understand is when a high energy particle such as neutrino interact with the nucleus as a whole, the neutrino energy is not transferred to the target nucleus. In the meanwhile, the nucleus will recoil thus the recoil energy created (phonon).

In this sense the coherent scattering effects is non-local over large distances. The story I have been told is that this is resolved by incorporating the realities of a real-world detector. For any traditional experiment, there is always a minimum forward acceptance angle $\theta_0$ that it …

$\begingroup$ Coherent scattering of nuclei and nucleons at $ \hbar/q^2 \ll R$ is a fairly mundane and well understood phenomena (it was, for instance, the tool we attempted to use to probe the onset of perturbative physics in my dissertation project) despite the fact that it seems to violate the size scaling rule. $\endgroup$