| 单词 |
radiationless |
| 释义 |
radiationless, a. Physics and Chem.|reɪdɪˈeɪʃənlɪs|
[f. radiation + -less.]
Not involving the emission of electromagnetic radiation.
1919Proc. Nat. Acad. Sci. V. 590 For any real motion, where the velocity is less than that of light,..radiationless orbits, other than straight lines uniformly described, are impossible. 1931Proc. R. Soc. A. CXXXII. 668 It is uncertain whether these γ-rays are actually emitted or whether the β-ray lines from which their existence is inferred are due to a radiationless transition. 1939Trans. Faraday Soc. XXXV. 142 The radiationless transfer of energy from A to A′ is caused by the close electrical coupling (resonance) between the electrons in atoms close together as in crystals. 1974Nature 15 Mar. 196/1 The excited molecule loses its energy, first, by radiationless conversion to the lower excited singlet state and finally by fluorescence from this state at 28,600 cm-1.
Hence radiˈationlessly adv.
1974Gill & Willis Pericyclic Reactions v. 137 However, the BO ‘hole’ provides a mechanism for the system to relax radiationlessly into the ground state. |
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