The laser triggered "exotherm" might be the result of formation of Lithium-Gold, Lithium-Pd,
Li-D, and out gassed Deuterons, or any number of exothermic intermetallic compound/Deuteron
formation reactions.
The exothermic Lithium-Tin reaction was considered for space power applications
in the late 1960's. (I know, I was co-inventor of it) The Lithium-Copper reaction is quite spectacular.
There is a related article in the Ed's Lenr-Canr Files
Frederick

