Brackettn.

/ˈbrakɪt/

Etymology: < the name of Frederick Sumner Brackett (1896–1988), U.S. physicist.

Physics.

Used attributively to designate a series of lines discovered by Brackett in 1922 ( Astrophysical Jrnl. LVI. 154) in the infra-red part of the spectrum of atomic hydrogen, with wave numbers represented by the formula R(1/4² − 1/m²) (where R is the Rydberg constant and m = 5, 6,…), of which the first line is at 4·04 micrometres and the series limit is at 1·46 micrometres.

ΘΚΠ

the world > matter > physics > atomic physics > decomposition of light, spectrum > [adjective] > referring to discoveries by specific scientists

Balmer1891

Zeeman1898

Pickering1914

Lyman1922

Brackett1930

1930 L. Pauling & S. Goudsmit Struct. Line Spectra i. 3 There have since been discovered other hydrogen series..the Lyman series..the Paschen series..the Brackett series.

1967 W. R. Hindmarsh Atomic Spectra ii. 13 Ritz..proposed his well-known combination principle in 1908; he recognized that the wave-numbers of the lines could always be represented as a difference between two terms... It was with the use of this principle that the Paschen, Lyman, Brackett and Pfund series in the spectrum of hydrogen were predicted..before they were known experimentally.

1970 D. W. Tenquist et al. Univ. Optics II. ii. 43 Lines in the infra-red part of the spectrum are caused by transitions terminating at n = 3 (Paschen series), n = 4 (Brackett series) and n = 5 (Pfund series).

This entry has not yet been fully updated (first published 1989; most recently modified version published online September 2018).

单词	brackett
释义	Brackettn. /ˈbrakɪt/ Etymology: < the name of Frederick Sumner Brackett (1896–1988), U.S. physicist. Physics. Used attributively to designate a series of lines discovered by Brackett in 1922 ( Astrophysical Jrnl. LVI. 154) in the infra-red part of the spectrum of atomic hydrogen, with wave numbers represented by the formula R(1/4² − 1/m²) (where R is the Rydberg constant and m = 5, 6,…), of which the first line is at 4·04 micrometres and the series limit is at 1·46 micrometres. ΘΚΠ the world > matter > physics > atomic physics > decomposition of light, spectrum > [adjective] > referring to discoveries by specific scientists Balmer1891 Zeeman1898 Pickering1914 Lyman1922 Brackett1930 1930 L. Pauling & S. Goudsmit Struct. Line Spectra i. 3 There have since been discovered other hydrogen series..the Lyman series..the Paschen series..the Brackett series. 1967 W. R. Hindmarsh Atomic Spectra ii. 13 Ritz..proposed his well-known combination principle in 1908; he recognized that the wave-numbers of the lines could always be represented as a difference between two terms... It was with the use of this principle that the Paschen, Lyman, Brackett and Pfund series in the spectrum of hydrogen were predicted..before they were known experimentally. 1970 D. W. Tenquist et al. Univ. Optics II. ii. 43 Lines in the infra-red part of the spectrum are caused by transitions terminating at n = 3 (Paschen series), n = 4 (Brackett series) and n = 5 (Pfund series). This entry has not yet been fully updated (first published 1989; most recently modified version published online September 2018). < n.1930
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