Digging deep for dark matter -
“Many experiments have tried with many different elements, but it was the DAMA/LIBRA experiment in Italy using sodium iodide crystal that produced this light from what we think are interactions with dark matter.”“Dark matter interacts with the nucleus of the crystal, so the mass of the nucleus is important. Depending on the mass of dark matter, different materials will have a different sensitivity.At this point, Professor Barberio notices my blank face.
“Think of a billiard ball. If you have a big billiard ball and dark matter is a much smaller billiard ball, you won’t be able to move the big ball – so you won’t produce a signal. But if your dark matter billiard ball is enormous, it will just crush everything.
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