What's the project? The experimental protocol?
What hypotheses are you testing? When ghosts are a by-product, the research must at least be interesting.
I wanted to test if fell moods actually could use ghosts instead of dwarves, making ghostly weapons/armor, and testing if (unlikely) these had different properties than regular bone/leather.
I made each of my starting seven their own lockable work area, with access to a food pile, stocked by two farmers, but I wanted to make sure atom smashing would create ghosts before I went any further. I plan to keep everyone just barely unhappy, through constructing/deconstructing their bedroom decorations, dining rooms, etc., and in emergencies, toggling a waterfall, and then as soon as one of them goes Fell, locking their door and hoping one of the ghosts will drift into their room. Unfortunately, a macabre mood is also a possibility, so I will keep some dead things on hand.
All migrants will be atom smashed, to create as many ghosts as possible, and the violent ones will be slabbed.
I will also try and note which personality attributes become which kind of ghost, to see if there's a connection.
However, I probably won't be able to do this anytime soon, so the research will likely not be posted for quite a while. If anyone else wants to conduct this experiment in the mean time, I would greatly encourage it.