Doing further transmutation experiments (as suggested by the above paper as being the missing part of the TG programme) would seem to be a good idea:
These two Hungarian physicists seem to be really switched on to novel thinking about LENR which I suppose is a very positive result of TG's Nature paper shaking the stuffy old academics out of their usual SM torpor! Like the suggestion that ANY element can undergo transmutation at low kinetic energies (which has always been discounted by the increased Coulomb repulsion of nuclei with higher Z than say Li). A refreshing renaissance of ideas perhaps?
Based on our recent theoretical ﬁndings (Phys. Rev. C 99, 054620 (2019)) it is shown that proton and deuteron capture reactions of extremely low energy may have accountable rate in the case of all elements of the periodic table. Certain numerical results of rates of nuclear reactions of two ﬁnal fragments of extremely low energy are also given. New way of thinking about low-energy nuclear reactions (LENR) phenomena is suggested. Possible explanations for the contradictory observations announced between 1905-1927 and possible reasons for negative results of ’cold fusion’ experiments published recently by the Google-organized scientiﬁc group (https://www.nature.com/articles/s41586019-1256-6) are given.
See my post in this thread about undeniable and dramatic amount of transmutation in mercury achieved by Cardone et al (2015 with further analysis in 2017). These results are absolute proof of nuclear reactions completely outside of what is currently accepted or thought as possible.