Ghost notes (bass musicsheet)

Hello,

I don't know if this exist for other instruments, but with a bass a ghost note is a note that you play while muting the string with the left hand, in order to get a percussive attack but no real pitch usually just before the real note to emphasize it.

I can write a sheet with ghost notes, but when MuseScore plays the sheet the real note is played.
1 - do I use the right way to create these ghost notes
2 - Is there a way to have a percussive sound instead of the real note ?

Thanks in advance