| 单词 | isotope shift |
| 释义 | > as lemmasisotope shift isotope shift n. a small difference in the wavelength of corresponding spectral lines of different isotopes of an element owing to the different masses and charge distributions of their nuclei. ΘΚΠ the world > matter > chemistry > elements and compounds > isotopes > [noun] > isotope shift isotope shift1932 the world > matter > physics > atomic nucleus > radioactive isotope > [noun] > difference in wavelength isotope shift1932 1932 Physical Rev. 42 350 It appears that this determination fits in with the magnitude of the isotope shift. 1958 Oxf. Mag. 8 May 418/1 Work on high resolution optical spectroscopy is now mainly directed towards the study of ‘isotope shifts’. 1971 Physics Bull. Oct. 583/2 Isotope shifts occur when the energy levels of different isotopes are slightly shifted with respect to one another, resulting in an apparent splitting of the ‘line’ if two or more isotopes are present in the source. < as lemmas |
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