In one of RG's articles he mentioned the steady (endless) stream of visitors. Some were highly experienced, although I am not sure what they did would qualify as a validation. Nonetheless, they were impressed with what they saw. At the time, I was aware of one such group who showed up with lots of fancy equipment, and expertise in this stuff (including nuclear science), representing a very respected institution. Trust me, there is nothing you could do, they didn't do, or do it better.
Even if you had Alan's blessings, and went through with this...what would it accomplish? I am confident from what I know, your spectrometer would show gammas consistently over background, but who would believe you, or care? Nothing personal, but as you well know, for 30 years not even the best qualified researchers in the field have been believed, or taken seriously when reporting XH, neutrons, and transmutations...so would you expect your expensive ($100,000 -give me a break ) validation trip to be any different?