In reply to Horace Heffner's message of Sun, 7 Feb 2010 05:52:36 -0900: Hi, [snip] >No, most of the 4He reactions occur sub-surface. What do you think >produces a "volcano"? A surface reaction? The typical 4He produced >by CF does not have MeV kinetic energy, and is not surface produced. >If it were there would be massive alpha counts. There is not >sufficient kinetic energy to push alphas that deep into the Pd. [snip] ...or alternatively fast alphas are produced, but only so deep in the Pd that they don't make it to the surface.
If lattice resonance is a factor, then some depth may be required to build up a strong enough resonance effect that the mechanism can operate. (analogous to adding more dipoles to a TV antenna). Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
