I guess because of the properties xenon is the candidate, but helium, argon or neon could also serve as dark matter detectors right?.. which is more efficient as a detector? the heavier one like xenon or the lighter one like neon?
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There are detectors made of argon, neon and xenon so far. I guess (this goes beyond what I know as a theorist) helium is not manageable because of the too low boiling point.
Great... thanks for clearing up my doubt :)
I hope I did, as I am unsure about my own answer. But it sounds logical to me ;)