On Mon, Sep 22, 2014 at 8:01 PM, <mix...@bigpond.com> wrote: I would still be inclined to consider reactions that produce heavy charged > particles. The heavier and slower, the better. E.g. fusion/fission > reactions.
The reactions I've been looking at recently have charged particles as daughters as well. But the daughters are generally protons in the 5-10 MeV range. The way I propose that gammas from excited nuclei are avoided is to suggest that the reactions occur at the surface and that the daughters fly out from the surface: +++++++++ d +++++++ p p p +++ p p p d p p ++ p ---> p d p +++ p p d p p p +++++++ p p p +++++++++ p Here the (+)'s are nickel lattice sites. The p results from an Ni(d,p)Ni reaction. The arrow represents the momentum. Although the p is born with ~ 5-10 MeV of energy, it burrows into the other p's at the surface, quickly thermalizing to a much lower energy. Occasionally there is a d that is broken apart through spallation. This wouldn't happen very often with a normal hydrogen mix, because there are only ~ 1/6000 parts deuterium, and only a fraction of these would be encountered (and only a fraction of the neutrons resulting from such spallations would exit the system). I think the secondary gammas from heavily charged slow moving daughter > nuclei > might have been shielded. > By this I take it you mean gammas from lattice sites excited through inelastic collisions? Eric
