单词	rubidium
释义	rubidium noun ru·​bid·​i·​um rü-ˈbi-dē-əm  : a soft silvery metallic element of the alkali metal group that reacts violently with water and bursts into flame spontaneously in air see Chemical Elements Table Example Sentences Recent Examples on the Web However, the trap that holds the rubidium atoms can be tuned to efficiently suck energy out of them. Chris Lee, Ars Technica, 7 Feb. 2022 Physicist Ron Folman of Ben-Gurion University of the Negev in Israel and his colleagues re-created the Stern-Gerlach experiment using not individual atoms but a cloud of rubidium atoms. Davide Castelvecchi, Scientific American, 8 Feb. 2022 In a media statement, the company stated that their rubidium atomic clock would deliver a frequency stability of about 2x10-14 over averaging intervals of 10,000 seconds. Jennifer Kite-powell, Forbes, 18 Sep. 2021 The team loaded 200 million rubidium atoms into their vacuum chamber and passed laser light through all the optics components, making the light collide with the atoms. Karmela Padavic-callaghan, Wired, 7 Sep. 2021 In that vacuum chamber, 18 tiny collections of rubidium atoms — about 10,000 to a group — are arranged in a line and cooled to phenomenally low temperatures, a fraction of a degree above absolute zero. Quanta Magazine, 7 Sep. 2021 Atoms of rubidium, a heavy cousin of the more familiar lithium and sodium, are appealing because their internal quantum states can be set and controlled by light. Gabriel Popkin, Science | AAAS, 3 June 2021 The physicists used rubidium atoms that had been cooled to temperatures about a millionth of a degree Kelvin above absolute zero as a starting point for their plasma—an extremely cold temperature instead of the extremely hot one inside the sun. Karmela Padavic-callaghan, Wired, 17 Mar. 2021 The researchers reported that the rubidium atoms spent, on average, 0.61 milliseconds inside the barrier, in line with Larmor clock times theoretically predicted in the 1980s. Quanta Magazine, 20 Oct. 2020 See More Word History Etymology New Latin, from Latin rubidus red, from rubēre First Known Use 1861, in the meaning defined above Medical Definition rubidium noun ru·​bid·​i·​um rü-ˈbid-ē-əm  : a soft silvery metallic element that decomposes water with violence and bursts into flame spontaneously in air —symbol Rb see Chemical Elements Table
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