Large electron screening effect in different environments
Matej Lipoglavsek, Ljubljana, Slovenia
(18) (PDF) Large electron screening effect in different environments. Available from: https://www.researchgate.net/p…in_different_environments [accessed Nov 16 2020].
Matej joke..TM 18.16
"42 is the answer to the ultimate question of the universe.".. no-one laughs...
Some results may be relevant to LENR reactions.
Finally In 2010 , after 5 years of failure to get an enhanced fusion"Electron screening " effect"
Breakthrough only when the target foil was damaged... by work hardening or radiation damage..
The latest Japanese alloys have crystal defects introduced... radiation damage/work hardening.. Takahashi/Mizuno
As it can be seen from table 1, large electron screening potential was observed in all targets with the highest value observed in graphite target. (42.9)These results can be interpreted in the following way. The presence of a hydrogen impurity atom in the hexagonal graphite lattice creates a lattice distortion  placing the proton always closer to one carbon atom than to the others.
This is different from cubic lattice of our metallic targets,where in the undamaged lattice the hydrogen finds an equilibrium position equidistant from the metallic atoms.
However, the palladium and tungsten targets were radiation damaged and protons were trapped into crystal lattice vacancies , where they are again closer to one metallic atom thanto the others. But we observed lower electron screening potentials in Pd than in the graphite target.
The reason for this is that in polycrystalline metals, hydrogen can also be trapped at grain boundaries and voids , where we assume lower electron screening, making the effective electron screening for the two kinds of trapping sites lower.
Next,the observed electron screening potential in the Pd target was lower than in the W target. A possible explanation for this is that our palladium sample was cold rolled, while the tungsten one was annealed. It is known that the cold rolling process increases the number of grain boundary defects, but when the foil is annealed the number of these defects is reduced. Due to this, the resulting effective screening potential in the Pd target is lower than in W.
The TiH target did not have the full TiH2 stoichiometry,since the powder has been stored in air for several years. The measured stoichiometry of 1.03 means that TiH1.03 is a mixture of fcc and tetragonal fct lattices . As we have shown in earlier experiments with Pd targets, the hydrogen on regular interstitial sites in a fcc lattice does not produce a large electron screening effect. Only when the protons are pulled way from their fcc equilibrium positions, a large screening effect occurs.This is the case in the fct lattice in TiH.
Finally, from the presented results
we calculated that the dependence of the electron screening potential on the proton number Zof the projectile seems to be higher than Z2..