英语词汇“k-shell”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

e. In Physics K is used to designate the series of X-ray emission lines of shorter wavelength obtained by exciting the atoms of any particular element (cf. L n. 6a); these arise from electron transitions to the innermost, lowest-energy atomic orbit, of principal quantum number 1, which is thus termed the K-shell, and electrons in this shell K-electrons. K capture n. (also K-electron capture) the capture by an atomic nucleus of one of the K-electrons.

ΚΠ

1911 C. G. Barkla in London, Edinb. & Dublin Philos. Mag. 6th Ser. 22 406 It is seen that the radiations fall into two distinct series, here denoted by the letters K and L. [Note] Previously denoted by letters B and A... The letters K and L are, however, preferable, as it is highly probable that series of radiations both more absorbable and more penetrating exist.

1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines iii. 144 If the excitation occurs through the agency of cathode rays, it is easy to imagine that the tearing-off of the ‘K-electron’ is effected by the impact of a cathode-ray particle that has penetrated into the atom.

1923 E. N. da C. Andrade Struct. Atom vi. 100 Moseley identified in the K series the two lines which he called α and β... In the L series he identified five lines.

1938 L. B. Loeb Atomic Struct. iii. 83 A tube with 1,470 volt electrons may excite K x-rays of Al, while it takes 60,600 volt electrons to excite the K x-rays of tungsten.

1946 H. Semat Introd. Atomic Physics (ed. 2) viii. 342 Probably the most clearcut example of K-electron capture is the radioactive disintegration of vanadium, ₂₃V⁴⁹, into titanium, ₂₂Ti⁴⁹, with the capture of a K electron by the vanadium nucleus to form a titanium atom in the K state.

1951 J. Dougall tr. M. Born Atomic Physics (ed. 5) vii. 220 K-capture should therefore compete with β-decay.

1970 G. S. Hurst & J. E. Turner Elem. Radiation Physics ii. 24 A few nuclei..capture an atomic electron from outside the nucleus, most often from the K-shell, and emit a neutrino.

单词	k-shell
释义	> as lemmas K-shell e. In Physics K is used to designate the series of X-ray emission lines of shorter wavelength obtained by exciting the atoms of any particular element (cf. L n. 6a); these arise from electron transitions to the innermost, lowest-energy atomic orbit, of principal quantum number 1, which is thus termed the K-shell, and electrons in this shell K-electrons. K capture n. (also K-electron capture) the capture by an atomic nucleus of one of the K-electrons. ΚΠ 1911 C. G. Barkla in London, Edinb. & Dublin Philos. Mag. 6th Ser. 22 406 It is seen that the radiations fall into two distinct series, here denoted by the letters K and L. [Note] Previously denoted by letters B and A... The letters K and L are, however, preferable, as it is highly probable that series of radiations both more absorbable and more penetrating exist. 1923 H. L. Brose tr. A. J. W. Sommerfeld Atomic Struct. & Spectral Lines iii. 144 If the excitation occurs through the agency of cathode rays, it is easy to imagine that the tearing-off of the ‘K-electron’ is effected by the impact of a cathode-ray particle that has penetrated into the atom. 1923 E. N. da C. Andrade Struct. Atom vi. 100 Moseley identified in the K series the two lines which he called α and β... In the L series he identified five lines. 1938 L. B. Loeb Atomic Struct. iii. 83 A tube with 1,470 volt electrons may excite K x-rays of Al, while it takes 60,600 volt electrons to excite the K x-rays of tungsten. 1946 H. Semat Introd. Atomic Physics (ed. 2) viii. 342 Probably the most clearcut example of K-electron capture is the radioactive disintegration of vanadium, ₂₃V⁴⁹, into titanium, ₂₂Ti⁴⁹, with the capture of a K electron by the vanadium nucleus to form a titanium atom in the K state. 1951 J. Dougall tr. M. Born Atomic Physics (ed. 5) vii. 220 K-capture should therefore compete with β-decay. 1970 G. S. Hurst & J. E. Turner Elem. Radiation Physics ii. 24 A few nuclei..capture an atomic electron from outside the nucleus, most often from the K-shell, and emit a neutrino. extracted from Kn. < as lemmas
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> as lemmas