Dennis Cravens mentioned here on vortex that he has had success in LENR when he adds rare earth metals to his experiments.
The method by which this addition of rare earths might succeed in LENR is that rare earths have an electron orbital structure like iron where the 4F electron obit is the same as iron. This allows for the generation of rare earth magnetism to be generated in the Cravens experiments. http://www.fys.ku.dk/~jjensen/Book/Ebook.pdf Rare earths seem to provide the magnetic fields needed to stimulate LENR even if it is at a very low level in the Cravens experiments.
