It just occurred to me that the hypothesis of ultra cold neutrons in LENR is falsifiable ! Not only that, it should be relatively easy to do, and with a significantly large and obvious level of discrimination in side-by-side testing.
As mentioned, according to the information on the Wiki site, some of it going back to Fermi, the kinetic energy near absolute zero of 300 neV neutrons corresponds to a maximum velocity of 7.6 m/s. Consequently, there will be travel from point of origin, since even with high reflectivity at first, the neutrons will be gradually thermalized and can move significant distances if there is an outside influence. Which there always will be, if you think about it. Here is the key to falsifiability: Due to the small kinetic energy of an UCN, the influence of gravity is significant. Kinetic energy of an UCN is transformed into potential (height) energy with ~102 neV/m. which is a third of total kinetic energy on formation, if they are very cold. This effect is less in proportion, as the particle warms up, but it should allow a gravity gradient to exist when capture occurs. Thus, it would seem that a small CR-39 cell of the SPAWAR variety, designed so that it can be rotated 180 degrees - so that the CR-39 is "either down or up" will show a rather pronounced variation in tracks if UCN are involved, due to the effect of gravity. There will be viewer per unit of time in the "up" position than in the down. Now that should be rather easy to pull off, no? ... or has this been tried already?
