It gets absorbed and redistributed between many atom (nuclei) colliding along single line at the same moment. This dense line traps the released radiation like the optical filament so it has nowhere to escape.
this would be true for a bose condensate, but this is not the case here.
It struck me that Rossi is blowing smoke and inventing things just like Zephir likes to invent new physics to explain his word salid theories.