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