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

c. Physics. A displacement of a spectral line from the expected position or from some reference position; hence, a change of an energy level in an atom, molecule, etc.; chemical shift, in nuclear magnetic resonance or Mössbauer spectroscopy, the position of a resonance in the spectrum measured relative to some standard signal, the separation being characteristic of the chemical environment of the resonating nucleus. See also redshift n.

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the world > matter > physics > atomic physics > decomposition of light, spectrum > [noun] > lines reflecting energy levels > displacement from expected position

shift1884

the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > Mössbauer spectroscopy > feature of

chemical shift1952

Mössbauer effect1960

1884 London, Edinb. & Dublin Philos. Mag. 5th Ser. 18 161 A shift of the lines towards the more refrangible side of the spectrum.

1897 Astrophysical Jrnl. 5 210 Here is certainly a vera causa for some shift towards the red in molecules causing light.

1932 Physical Rev. 42 350 The direction of the shift is again such that Hg²⁰⁴ has the highest energy.

1945 R. A. Sawyer Exper. Spectrosc. v. 118 Changes in temperature and pressure may lead to serious difficulties in prism spectrographs through broadening and shifts of spectral lines.

1952 Physical Rev. 88 1070/1 A shift in the nuclear resonance, known as the chemical shift, is due to the effects of diamagnetism and induced paramagnetism in a molecule.

1961 A. D. Thackeray Astron. Spectrosc. xiii. 186 Interpreted as a radial velocity this shift implies that the nebula in question is running away from us at a speed of slightly over 60,000 km/sec.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VIII. 600a/1 Chemists have become interested in using the Mössbauer effect because of the isomer shift (also called isomeric or chemical shift); this results from the interaction of the electron density..at the nucleus with the nuclear charge.

1970 G. K. Woodgate Elem. Atomic Struct. viii. 154 Since the perturbing states of opposite parity lie a long way away,..one expects the Stark shift of the ground state to be small.

1978 P. W. Atkins Physical Chem. xix. 625 The two methylene protons are in a different part of the molecule; they therefore have a different chemical shift, and come into resonance at another magnetic field.

单词	chemical shift
释义	> as lemmas chemical shift chemical shift n. (see shift n. 14c). extracted from chemicaladj.n. chemical shift c. Physics. A displacement of a spectral line from the expected position or from some reference position; hence, a change of an energy level in an atom, molecule, etc.; chemical shift, in nuclear magnetic resonance or Mössbauer spectroscopy, the position of a resonance in the spectrum measured relative to some standard signal, the separation being characteristic of the chemical environment of the resonating nucleus. See also redshift n. ΘΚΠ the world > matter > physics > atomic physics > decomposition of light, spectrum > [noun] > lines reflecting energy levels > displacement from expected position shift1884 the world > matter > physics > atomic physics > decomposition of light, spectrum > study of spectra > types of spectrometry or spectroscopy > [noun] > Mössbauer spectroscopy > feature of chemical shift1952 Mössbauer effect1960 1884 London, Edinb. & Dublin Philos. Mag. 5th Ser. 18 161 A shift of the lines towards the more refrangible side of the spectrum. 1897 Astrophysical Jrnl. 5 210 Here is certainly a vera causa for some shift towards the red in molecules causing light. 1932 Physical Rev. 42 350 The direction of the shift is again such that Hg²⁰⁴ has the highest energy. 1945 R. A. Sawyer Exper. Spectrosc. v. 118 Changes in temperature and pressure may lead to serious difficulties in prism spectrographs through broadening and shifts of spectral lines. 1952 Physical Rev. 88 1070/1 A shift in the nuclear resonance, known as the chemical shift, is due to the effects of diamagnetism and induced paramagnetism in a molecule. 1961 A. D. Thackeray Astron. Spectrosc. xiii. 186 Interpreted as a radial velocity this shift implies that the nebula in question is running away from us at a speed of slightly over 60,000 km/sec. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VIII. 600a/1 Chemists have become interested in using the Mössbauer effect because of the isomer shift (also called isomeric or chemical shift); this results from the interaction of the electron density..at the nucleus with the nuclear charge. 1970 G. K. Woodgate Elem. Atomic Struct. viii. 154 Since the perturbing states of opposite parity lie a long way away,..one expects the Stark shift of the ground state to be small. 1978 P. W. Atkins Physical Chem. xix. 625 The two methylene protons are in a different part of the molecule; they therefore have a different chemical shift, and come into resonance at another magnetic field. extracted from shiftn. < as lemmas
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