Wiktionary
n. (context physics English) The sum of a particle's potential energy, kinetic energy and rest energy
Usage examples of "particle energy".
Our second key technological building block was the Langston Field, which absorbs and stores energy in proportion to the fourth power of incoming particle energy: that is, a slow-moving object can penetrate it, but the faster it's moving (or hotter it is) the more readily it is absorbed.
So the best answer we can give to our question depends on how high a particle energy we have at our disposal, because this determines on how small a length scale we can look.
A charged particle emerging from a pulsar's powerfully energetic surface is an energetic particle to begin with, and the incredibly intense magnetic field would accelerate it to enormous levels of cosmic ray particle energy at once.
At precisely midnight tomorrow Aunt Min will put into being a spell to cause the xchi-particle energy in the stones of the Citadel to behave temporarily like electromagnetic energy, so that it can be polarized into a stable field and we can finally search the place from top to bottom and see what we've got.