| 释义 |
transuranic, a. Physics.|trɑːnsjʊˈrænɪk, træns-, -nz-|
[f. trans- 11 + uranium + -ic 1 b.]
Of a chemical element: having a higher atomic number than uranium (i.e. 93 or over), the highest-numbered element to occur naturally in any but trace amounts.
1935Proc. R. Soc. A. CXLIX. 553 Our hypothesis that the 13-minute and 100-minute induced activities of uranium are due to transuranic elements seems to receive further support. 1958Times 29 Aug. 6/3 The..isolation of the transuranic elements. 1976Jrnl. R. Soc. Arts CXXIV. 586/1 Seventy-two of the ninety-two naturally occurring elements are metals. If one includes the man⁓made transuranic elements the proportion remains about the same.
Also transuˈranian (rare), -uˈranium adjs., in the same sense; also fig.
1938R. W. Lawson tr. Hevesy & Paneth's Man. Radioactivity (ed. 2) xxvi. 289 ‘Trans-uranium’ elements were first prepared by Fermi. 1946[see americium]. 1947Crowther & Whiddington Science at War iii. 129 He [sc. Fermi] concluded that he had made new atoms..and supposed that these must be ‘trans-uranian’ atoms. 1965C. Brooke-Rose in J. Turner Fourth Ghost Bk. 181 The rumour spreads..through live material like a transuranian element decaying..into lead. 1971Nature 6 Aug. 366/1 Seaborg..expressed the desire to return to California to resume his research on transuranium elements. 1978N. Freeling Night Lords xxiv. 112 Night is what? A trans-uranium element, perhaps. 1979Monitor (McAllen, Texas) 10 June 11-h/3 A person of almost transuranium energy. |