evidence on the copper cathode tip .Lithium to beryllium.
I have never been very impressed with the Widon Larsen theory but no doubt there are not many nuclear physicists reviewing papers in "Engineering Fracture Mechanics". If there had been they would sure have noticed that the proposed "electro-weak lithium cycle cycle of neutrons" to produce 4He is not a cycle at all! And its proposed first step is impossible because 6Li fissions to form fast tritons when interacting with neutrons! And fast tritons in a deuterated system will produce fast penetrating neutrons. Oops!