Brackett series

In atomic physics, the Brackett series is a series of absorption or emission lines that are due to electron transitions between the fourth and higher energy levels of the hydrogen atom. These lines lie in the infrared, with wavelengths from 4.05 micrometres (Brackett-alpha) to 1.46 micrometres (the series limit), and are named after the American physicist Frederick Sumner Brackett who first observed them in 1922.

Brackett series of hydrogen, n=4, in nm:

5-4 -- 4052.5

6-4 -- 2625.9

7-4 -- 2166.1

8-4 -- 1945.1

9-4 -- 1818.1

limit: 1459 nm

References

• Frederick Sumner Brackett, Visible and Infra-Red Radiation of Hydrogen; Astrophysical Journal, vol. 56, (1922) p.154; DOI: 10.1086/142697

See also

• Hydrogen spectral series

External links

• Brackett series (animation)
• Brackett series