You might dismiss Omasa’s claims as impossible, but the effect of causing 60 years of radiation decay on Cesium 137 in a few hours ...
Can you link a scholarly paper on this please? It seems like urban legend.
I tried a simple search on Google and got nothing including "Omasa" in the search.
I found this from 2006 but it's not Omasa and it's not helpful.
I did not do an exhaustive search.