Perhaps you should try some spelling variations:
"particle accelerator" » "particle accelerators", "particle acceleration"
"particle accelerated" » "particles accelerated", "particle acceleraton", "particle accelerators", "particles acceleratedd", "particle acceleratond", "particle acceleratorsd"
"particle accelerate" » "particles accelerated", "particle acceleraton", "particle accelerators"

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