Widom–Larsen theory
primary publication : http://www.ias.ac.in/describe/article/pram/075/04/0617-0637
citations of above: https://scholar.google.co.nz/scholar?cites=17520682514980447189&as_sdt=2005&sciodt=0,5&hl=en
reliable secondary sources: https://www.researchgate.net/profile/Einar_Tennfors/publication/260246109_On_the_idea_of_low_energy_nuclear_reactions_in_metallic_lattices_by_producing_neutrons_from_protons_capturing_heavy_electrons/links/0f3175304c0ac9f4e3000000.pdf
Neutron production in Thunderstorms:
WLT has been discussed as a theory to explain neutron production in thunderstorms, however, unreal concentrations of free electrons would be needed for the e–(p+, n)νe neutron yeild to be a significant component of thunderstorm neutrons.
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.093010#fulltext
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.92.044602
- http://crd.yerphi.am/files/Publication/References_to_CRD/Babich_anti_n20.pdf
- particular, while photonuclear and electrodisintegration reactions were discarded as explanations of the phenomenon by Babish, the Widom-Larsden Theory was discussed as helping explain the concentration of free electrons needed "in order to prescribe the neutron
- http://crd.yerphi.am/files/Publication/References_to_CRD/Babich_anti_n20.pdf
production to the opposite of the β-decay reaction." https://link.springer.com/article/10.1134/S1063776114030017