Perhaps you should try some spelling variations:
"particle accelerating" » "particle accelerations", "particles acceleration", "pareticle acceleration"
"particle acceleraton" » "particle accelerator", "particles acceleration", "particle accelerations"
"particle accelerators" » "particle accelerator", "particle accelerated", "particle accelerate"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("particle accelerators") OR ("particle acceleration"))) OR ((("particle accelerating") OR ("particle acceleraton")))).
• Removing quotes may allow a broader search: (((( particle accelerators ) or ( particle acceleration ))) or ((( particle accelerating ) or ( particle acceleraton )))).
• Adding a wildcard symbol may retrieve word variants: (((("particle accelerators") or ("particle acceleration"))) or ((("particle accelerating") or ("particle acceleraton"))))*.