| 单词 |
perturber |
| 释义 |
perturber|pəˈtɜːbə(r)|
[f. perturb v. + -er1.]
1. A disturber, troubler.
1485Rolls of Parlt. VI. 295/1 Many evill doers, and perturbers of the pees. a1533Ld. Berners Gold. Bk. M. Aurel. (1546) Hh iij b, To put awaie the perturbers of peace. 1602T. Fitzherbert Apol. 18 Perturbers, and enemies of the common wealth. a1700in Grant Burgh Sch. Scotl. (1876) ii. v. 195 [Forbidding them to be] perturbers, vaguers—[wandering from place to place].
2. Physics. A particle which interacts with a radiating atom or ion, affecting the wavelength of the emitted radiation.
1932Physical Rev. XL. 401 R1 means, crudely speaking, the distance of closest approach between the excited Hg-atom and its perturber. 1962M. Baranger in D. R. Bates Atomic & Molecular Processes xiii. 505 It often happens that the interaction of the perturbers with the atom in the lower state of a given line is much weaker than their interaction with the upper state. 1974H. R. Griem Spectral Line Broadening by Plasmas ii. 72 The principal difference between the broadening of neutral-atom and positive-ion lines lies in the presence of the long range Coulomb interactions between radiators and charged perturbers. |
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单词 perturbment 释义 perturbment rare.[f. perturb v. + -ment. Cf. OF. perturbement (1300 ......