?The text may need modification..or is the contradiction for effect.
"
This highest bremsstrahlung of 50 keV corresponds to channel 800, whereas the shoulder
at channel 200 corresponds to 21 keV X-Rays. We can conclude from figure 10 that the PMT detector set
up with aluminum foil acts as a simplified primitive low energy resolution X-Ray detector. The most likely
cause of the spontaneous radiation from the active chamber is therefore X-Rays.
"However, this conclusion is in fact impossible since the active chamber has no ongoing excitation with
laser or high voltage. Hydrogen has only entered a particular catalyst, and X-Ray emission from such a
chemical process is generally regarded as an impossibility.
Next we have to add the pulse shape observations. The radiation emitted from the active chamber can
come in bursts of multiple events within an event, as shown in figure 12. One raw pulse can contain up to
6-9 individual faster peaks indicating that the emitted radiation also is a combination or succession of pulse
trains, packets, or clusters. We do not see random smaller amplitude pulses between the main pulse clusters.
From this, we can only conclude that the we are most likely observing X-Rays bunches coming as random
events from the chamber."
The interesting result is that deuterium (vizaviz hydrogen) increases the radiation intensity and level
up to around 50 keV