pub fn interacting_per_depth(depth: f64, variance: f64) -> (f64, f64, f64)Expand description
q = (1 − T)/D, the fraction of the beam that interacts per unit optical
depth, with ∂q/∂D and ∂q/∂v, at optical depth depth (D, 0 or more)
and relative variance variance (v, 0 or more): Σ n σ_x · q is the
chance that a neutron’s first collision in the sample is of kind x.
q is 1 at D = 0.