scattering length

scattering length

[′skad·ə·riŋ ‚leŋkth]
(nuclear physics)
A parameter used in analyzing nuclear scattering at low energies; as the energy of the bombarding particle becomes very small, the scattering cross section approaches that of an impenetrable sphere whose radius equals this length. Also known as scattering power.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Moreover, solutions of FLO and heavy water ([D.sub.2]O) can be used to match the scattering length density (SLD) of certain nanoscale features and remove their scattering contributions (Hammouda 2010).
In the Thomas-Fermi approximation, a 2-parameter (mass m and scattering length a) density distribution of the BEC halo is obtained [see (3) below], which is less concentrated towards the centre as compared to the NFW model, relaxing the cuspy halo problem.
The inputs to the physical model are the scattering length density (SLD, real and imaginary components) of the sample under investigation as a function of depth along [??] into the material, where z [equivalent to] 0 is defined at the lower boundary of the sample.
The team, led by Ma Yugang with Shanghai Institute of Applied Physics (SINAP) in China; and Tang Aihong with the Brookhaven National Laboratory in the U.S., collided gold atoms to produce abundant antiprotons and measured two important parameters of their interaction: the scattering length and the effective range.
For example, nonlinearity management arises in atomic physics for the Feshbach resonance [4, 8] of the scattering length of interatomic interactions in BECs, where the interaction strength can be characterized by a single parameter, the s-wave scattering length [a.sub.s].
The neutron-scattering experiments, in this situation, should be performed with protonated polymers where the contrast of some structural elements (defects) is determined by the coherent scattering length density of material.
Bringing together writings by an international group of researchers working in different areas of quantum physics, the proceedings includes such topics as universality in few-body systems with large scattering length, simulations of dilute Fermi gases, normal persistent currents and gross shell structure in high spin, geometric aspects of the shell model, and quantum phase transitions in two-fluid systems.
Now we will write the relation between the scattering length of mesons and their in-medium mass-shift.
The resulting model parameters are: the low-Q scale factor A and Porod exponent n, the micelles volume fraction [[PHI].sub.fit], the ellipsoidal micelles half axes [R.sub.a] and [R.sub.b], the scattering length density inside the micelles [[rho].sub.m], the scattering length density for the solvent [[rho].sub.s], and the charge on the micelles.
By selectively deuterating either the chromophore or the polymer, a difference in the scattering length densities of these two components is introduced without significantly affecting the electron density.