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

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