One of the first reports is in
Battaglia, l. Daddi, s. Focardi, v. G, v. Montalbano, f. Piantelli, P.G. Sona and s.
Veronesi - Neutron emission in Ni-H Systems. Il Nuovo Cimento 1999, pp 921-931
112A, Vol.
That article was summarized in a document about Italian research posted by ?? to L-F as an attachment:
https://www.lenr-forum.com/attachment/2682-lner-overview-of-italian-experiments-pdf/
"One of the experimental cells, one that produced about 900 MJ, while producing energy,
uttered a few days neutrons that were observed with two different techniques, using
neutron counters to He3 and gold activation technique. The latter (R3) allowed him to
assess the flow of neutrons emitted from experimental cell 10 neutrons/cm2s equal to
1000 times the estimated flow of neutrons contained in cosmic radiation."
The referenced article in English (R3) is available from Springer (paywalled):
Another excerpt from the document is pertinent to the immediate subject in this thread (H flux)
"Also... observed the existence of some temperatures at
which the amount of (H) absorbed (by the nickel) per unit of time particularly high values
(A3). The variability of such loading concluded that this first trial is essential if you
experience any of the following phenomena observed. In other words, if the metal doesn't
absorb hydrogen there is no effect."