10 junio 2015
Experimental physicists have successfully cooled molecules in a gas of sodium potassium to a temperature of 500 nanokelvins — just a hair above absolute zero, and over a million times colder than interstellar space. The researchers found that the ultracold molecules were relatively long-lived and stable, resisting reactive collisions with other molecules. The molecules also exhibited very strong dipole moments — strong imbalances in electric charge within molecules that mediate magnet-like forces between molecules over large distances.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/rvUh79xET_8/150610131802.htm
