where [C.sub.e[lambda]] is extinction cross section, [C.sub.s[lambda]] is the
scattering cross section, [k.sub.0] is the wavenumber in the outer medium, and a and b are coefficients that are functions of the complex refractive index of the fiber, the incident angle, the radius of the fiber, and the wavelength.
After an extensive analysis throughout the periodic table, using also ENDF library and JANIS software, it was found that only a few isotopes exhibit an intense peak of
scattering cross section at the desired energy range (Table 2).
The
scattering cross section and extinction cross section of particle are evaluated by
There is an interesting opportunity to estimate the total
scattering cross section [sigma] from data on [v.sub.t] presented in Table 3, namely, equations (15)-(18) in [15], where the collision integral frequencies are expressed through the parameters of the intermolecular potential [U.sub.jn] (r) = - [C.sub.jn]/[r.sup.n] (here j denotes a molecular state), allow expressing the real part of [v.sub.t] via [sigma] averaged over velocities.
The BPT/VRPT fist-order solution is hereinafter detailed for a monostatic configuration in terms of normalized radar
scattering cross section (NRCS).
In fact, the incoherent
scattering cross section for a POPC molecule is about 95% of the total cross section and is due to the predominant incoherent scattering of hydrogen in the biomolecules.
The scattering coefficient denoted as 5 is defined as the product of the number of particles by unit volume, noted as [[rho].sub.0], with the
scattering cross section [C.sub.sca].
Differential
scattering cross section per unit volume: