These questions can be answered in two ways: analytically, by invoking a complicated double differential scattering cross section in the LAB system, or numerically, by calculating the collision rates for initial neutron trajectories (for neutrons emitted from the internal cylindrical surface of the moderator), simulating the isotropic
angular distribution of scattering in the CM coordinate system, and finally by performing analytical transformation of the scattered velocity vectors to the LAB system in order to follow neutron trajectories to the detector.
Vertical
Angular Distribution of Synchrotron Radiation
Another publication from our collaboration used the
angular distribution information to determine the electronic structure, symmetry, and decay dynamics for members of the TO series(16).
For an ideal meter, the spectral responsivity can be calibrated using an incident beam of any solid angle, and the meter can then be used to correctly measure light entering the meter aperture over any
angular distribution. In reality, meters are not ideal and have a responsivity that decreases with angle faster than the cosine function.
When multiple scattering occurs, the
angular distribution becomes less strongly peaked [20].
Figure 2 shows the
angular distribution of P and S waves.
Figure 1(a) shows the radiation power distribution versus wavelength with a peak value of 447 nm; Figure 1(b) shows the
angular distribution of the luminous intensity curve.
These methods need not any spectral searching and it can deal with unknown
angular distribution functions.
In the paper, we theoretically study the
angular distribution of [eta] mesons for different incident photon energies [E.sub.[gamma]] and for different final state energies W.
Several types of uncertainties can be considered, that is, those due to (1) neutron/gamma multigroup cross-sections, (2) energy-dependent response functions, and (3) secondary
angular distribution (SAD) or secondary energy distribution (SED) uncertainties.
In the vicinity of the substrate, that is, in the presheath and sheath, the ions are accelerated and their
angular distribution gets narrower.
The
angular distribution of backscattered light intensity was approximated by Gaussian distribution, and its standard deviation was used for the surface roughness analyses.
