Electrons are caused to bombard {HEAD ~ the surface} of {TAIL ~ the solid material}, transferring their energy to the atoms/molecules comprising the source material and resulting in sublimation 
of
Electrons are caused to bombard { HEAD ~ the surface } of { TAIL ~ the solid material } , transferring their energy to the atoms / molecules comprising the source material and resulting in sublimation
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH