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

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