| 释义 |
xenon Chem.|ˈzɛnɒn|
[ad. Gr. ξένον, neut. of ξένος strange.]
A heavy inert gaseous element present in minute quantity in the atmosphere, discovered by Sir William Ramsay in 1898. Symbol Xe or X. Also attrib. and Comb.
1898Ramsay & Travers in Rep. Brit. Assoc. Bristol 830 The last fractions of liquefied argon show the presence of three new gases. These are krypton..metargon..and a still heavier gas,..which we propose to name ‘xenon’. 1938Ann. Reg. 1937 358 Laporte..showed that white light could be obtained from a xenon tube through which brief but very intense currents were passed. 1957T. L. J. Bentley Man. Miniat. Camera (ed. 5) v. 74 The practical uses of electronic flash sets are governed by the characteristics of the modern xenon-filled flash tube. 1959New Scientist 1 Jan. 12/1 The main lighting was provided by a pulsed xenon compact source lamp, and its intensity was of the order of 50,000 foot candles. 1962Newnes Conc. Encycl. Nucl. Energy 877/1 Xenon is of importance in nuclear technology because several radioactive isotopes of the element are found among the fission products. One of these, Xe135,..gives rise to fission-product poisoning of the reactor. 1963[see react v.1 1 c]. 1971Xenon arc [see spectrally adv. 2]. 1971Sci. Amer. Oct. 92/3 The compounds they studied were two chlorides of xenon, XeCl2 and XeCl4, which they produced indirectly by synthesizing analogous compounds where radioactive iodine 129 took the place of xenon... It will be recalled that xenon used to be called an inert, or ‘noble’, gas because it was thought to be chemically completely unreactive. 1976Daily Times (Lagos) 8 July 17/1 Most film theatres in this country operating in 35mm have such poor and antiquated projection equipment that a good 16mm heavy duty projector equipped with a xenon lamp will certainly achieve better picture and sound quality. |