Gerald,
glad to be allowed to say this again: "Thank you very much, Sir!"
By the way, I took the opportunity to meanwhile discuss the topic with a pretty good fellow of mine who has done his PhD in particle physics.
Fortunately I have some of these brilliant people around to talk to as you know. Due to I am sure that he knows what he's talking about, please let me report as follows...
Finally it is as assumed, since finally what matters at the subatomic level is the amount of energy (eV) which must lie above the threshold value (lying again above the amount of binding energy) to be exceeded to create either a (gamma, n) or (gamma, p) reaction at the nucleus.
And due to the wave-particle duality it doesn't matter if this reaction is initiated by an X-ray or Gamma-ray source.
This again would also explain what BALDWIN and KOCH (
http://prola.aps.org/abstract/PR/v67/i1-2/p1_1) have already found out in the 1940's by having used a betatron for creating radionuclides with a short half-life period.
Oh... almost forgotten.
I have found the article in terms of what I said I have read 25 years ago.
It was published in an "old" German Welding Society trade journal (Schweißen & Schneiden). And you know what?
It was from the late 1960's and dealt with the usage of a betatron for great wall thicknesses and part dimensions.
I'm on the road currently.
But if I may find the time, I'll scan and post a picture of this device here in the forum.
Regards and it's good you're back,
Stephan