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

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 accelerator") OR ("particle accelerators"))) OR ((("particle accelerating") OR ("particle acceleraton")))).
• Removing quotes may allow a broader search: (((( particle accelerator ) or ( particle accelerators ))) or ((( particle accelerating ) or ( particle acceleraton )))).
• Adding a wildcard symbol may retrieve word variants: (((("particle accelerator") or ("particle accelerators"))) or ((("particle accelerating") or ("particle acceleraton"))))*.