NO : In space-incoherent scattering, a ray emitted by the source not in the direction of the observer may be scattered to this direction.
On the contrary, in space-coherent scattering, for instance in refraction, the ray is scattered in the incident direction if the medium is homogeneous.
The CREIL is a space-coherent interaction between electromagnetic time-incoherent beams (usual light in particular) scattered by few low pressure gases, the most common being atomic hydrogen in its state of principal quantum number n=2 ( named H*). generally, the high frequency beams are redshifted while the low frequency are blueshifted.

The periodicity of the redshifts is not an old concept: recently Bell and Comeau put a paper on arxiv.They found with a better precision the same periodicity zc=0.062 than the previous authors. But they did not remark that the relative frequency shifts which shift the Lyman beta and gamma lines to the Lyman alpha of hydrogen are 3*zc and 4*zc (elemrentary computation!). This shows that the Lyman forests of the quasars are produced by an interaction of absorptions and CREIL redshifts in the atomic hydrogen which surrounds the quasars. Consequently, the quasars are close, in fact they are the "accreting neutron stars" described by the theory of stars, but "never observed" while they should be, because when they are observed, they are named quasars.

Remark tht the high redshifts are always observed where the beams have crossed regions in which there may be H* ( T=100 000 K or T=20 000 K + Lyman alpha pumping)

__________________
JMB