The material particle nature of primary cosmic radiation has been confirmed, although the processes turned out to be extraordinarily more complicated than we had assumed.
Walther BotheTo demonstrate this simultaneity is by no means trivial, because it may for example happen that the product nucleus always forms in an activated state at first.
Walther BotheStrict conservation of energy in the elementary process had thus been confirmed also by a negative experiment.
Walther BotheThe Laboratory for Radioactivity consisted of only two rooms at the time; at a later date, when tests of radioactive substances became more extensive, it expanded into four rooms.
Walther Bothe