单词 | n-shell |
释义 | > as lemmasN-shell 10. Physics. In form N. Designating the series of X-ray emission lines obtained by exciting the atoms of any particular element which are of longer wavelength than the M-series (cf. M n. 11a), and arise from electron transitions to the atomic orbit of fourth lowest energy, of principal quantum number 4 (the N-shell). N-electron n. an electron in the N-shell. ΚΠ 1911 C. G. Barkla in London, Edinb., & Dublin Philos. Mag. 6th Ser. 22 408 From the similarity of the behaviour of all the elements we must then admit..the possibility of further series M, N, &c. 1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines viii. 505 Our relativistic formula of the fine-structure..furnishes us with a principle of sub-division for the multiplicity of M- and N-lines. 1948 R. E. Lapp & H. L. Andrews Nucl. Radiation Physics v. 74 In the heavier elements such as tungsten (Z = 74) the N shell is saturated with 32 electrons. 1967 G. L. Clark Handbk. X-rays i. 7 At still longer wavelengths M- and N-series lines have been measured only for heavier elements. 1968 Physical Rev. 166 944/1 Radiationless transitions are favored in low-Z elements and always dominate in the M, N, and higher shells for the ordinary Auger effect. 1970 E. P. Bertin Princ. & Pract. X-ray Spectrometr. Anal. i. 27 An electron having just enough energy to expel, say, an LII electron can also expel LIII, M, and N electrons, but not LI or K electrons. 1995 Jrnl. Mod. Optics 42 1766 The spectral amplitude produced by an N-electron bunch in a storage ring is reviewed. < as lemmas |
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