There is a similar question like this in the database but there are significant differences so I will attempt to post this. The motivation is that I read a documentary that says some of the bulldozer's used in the Chernobyl clean up had to be entirely abandoned and buried on the spot. I presume they dumped dirt and concrete from a helicopter on the bulldozer's.
Realizing there was most probably not only intense gamma rays but also intense neutron bombardment of the steel in the bulldozer I am wondering if the gamma rays had any play into this.
I can see how neutrons are able to do this with "induced radioactivity" although I don't quite understand if the metal has transmuted or just briefly unstable. However , I have a harder time seeing how high energy photons such as in gamma ray can interact with metals such as steel or possibly lead as another example.