@Gannediy
I don't do videos. They take too much time and convey too little information. Internet data costs money.
Papp ran his engine around 800 RPM, or one power stroke every one thirteenth second. The explosions were much quicker than that. Your experiment may be producing some such reactions with the resulting creation of high energy neutrons. According to my calculations those neutrons have initial velocities approaching one fifth the speed of light. You need to look for such neutrons. GBW has a good review of the challenges of such on this thread.
This is a potentially dangerous reaction. Proceed accordingly. In spite of what was said it's likely that some neutrons are absorbed by the other Noble gasses resulting in low level radioactivity. Consider Papp for thirty years or so simply exhausting the used gasses into the lab and breathing them. He died at age 56 of colon cancer.🤠