Franck–Condonn.

Brit.

/frɑːŋkˈkɒndən/, U.S.

/ˌfrɑnkˈkɑnd(ə)n/

Origin: From proper names. Etymons: proper names Franck, Condon.

Etymology: < the names of James Franck (1882–1964), German physicist, who first described the principle, and his student Edward U. Condon (1902–74), U.S. physicist, who expressed Franck's theories in terms of quantum mechanics.Franck's paper was published in Trans. Faraday Soc. (1926) 21 536, and Condon's in Physical Rev. (1926) 27 640 and 28 1182.

Physical Chemistry.

attributive. Designating or relating to the principle that an electronic transition in an atom is so fast that the configuration of the atomic nucleus is likely to remain unchanged during it, but that a change from one nuclear vibrational level to another will be more likely the more the two vibrational wave functions overlap; esp. in Franck–Condon principle, Franck–Condon factor.

ΘΚΠ

the world > matter > chemistry > atomic chemistry > [adjective] > relating to nuclei > principles relating to

Franck–Condon1928

1926 Physical Rev. 28 1166 Condon, in his extension of Franck's mechanical explanation of the intensity distribution, has obtained a satisfactory quantitative agreement for this particular system.]

1928 Proc. National Acad. Sci. U.S.A. 14 870 Applying the Franck–Condon principle here again we see that such a continuous spectrum could not originate.

1936 Jrnl. Chem. Physics 14 196/1 Even with the aid of the Franck–Condon assumption one must have information about the vibrational wave functions in order to calculate transition probabilities.

1972 McGraw-Hill Yearbk. Sci. & Technol. 1971 243/1 Optical transitions are represented vertically on such a diagram because they are very rapid compared with vibrational motion (the Franck-Condon principle).

2002 Science 18 Jan. 481/1 Neutralization of the cation would be prevented by unfavorable Franck–Condon factors.

This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).

单词	franck–condon
释义	Franck–Condonn. Brit. /frɑːŋkˈkɒndən/, U.S. /ˌfrɑnkˈkɑnd(ə)n/ Origin: From proper names. Etymons: proper names Franck, Condon. Etymology: < the names of James Franck (1882–1964), German physicist, who first described the principle, and his student Edward U. Condon (1902–74), U.S. physicist, who expressed Franck's theories in terms of quantum mechanics.Franck's paper was published in Trans. Faraday Soc. (1926) 21 536, and Condon's in Physical Rev. (1926) 27 640 and 28 1182. Physical Chemistry. attributive. Designating or relating to the principle that an electronic transition in an atom is so fast that the configuration of the atomic nucleus is likely to remain unchanged during it, but that a change from one nuclear vibrational level to another will be more likely the more the two vibrational wave functions overlap; esp. in Franck–Condon principle, Franck–Condon factor. ΘΚΠ the world > matter > chemistry > atomic chemistry > [adjective] > relating to nuclei > principles relating to Franck–Condon1928 1926 Physical Rev. 28 1166 Condon, in his extension of Franck's mechanical explanation of the intensity distribution, has obtained a satisfactory quantitative agreement for this particular system.] 1928 Proc. National Acad. Sci. U.S.A. 14 870 Applying the Franck–Condon principle here again we see that such a continuous spectrum could not originate. 1936 Jrnl. Chem. Physics 14 196/1 Even with the aid of the Franck–Condon assumption one must have information about the vibrational wave functions in order to calculate transition probabilities. 1972 McGraw-Hill Yearbk. Sci. & Technol. 1971 243/1 Optical transitions are represented vertically on such a diagram because they are very rapid compared with vibrational motion (the Franck-Condon principle). 2002 Science 18 Jan. 481/1 Neutralization of the cation would be prevented by unfavorable Franck–Condon factors. This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022). < n.1928
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