Humphreys series
(hydrogen lines for electrons settling from n > 6 to n = 6)
The Humphreys series is the set of
emission lines from atomic hydrogen gas,
due to electrons descending from
an electron shell of number n greater than 6 down to that of n = 6,
or the analogous absorption lines when absorbed electromagnetic radiation (EMR)
makes electrons do the opposite.
It is one of the hydrogen line series, such as
the Lyman series and Balmer series, and is
named after Curtis J. Humphreys.
The lines are within infrared and some are within atmospheric windows,
so given no redshift, some of the lines in astronomical sources may
be viewed from ground telescopes while others are blocked.
Lines:
- 7 -> 6: 12.37 μm
- 8 -> 6: 7.503 μm
- 9 -> 6: 5.908 μm
- 10 -> 6: 5.129 μm
- 11 -> 6: 4.673 μm
- ...
- infinity -> 6: 3.282 μm
Formula for the wavelengths:
1/wavelength = RH ( 1/36 - 1/n² )
(hydrogen,line series,lines,spectrum)
Further reading:
https://en.wikipedia.org/wiki/Hydrogen_spectral_series
https://www.oxfordreference.com/view/10.1093/oi/authority.20110803095950480
https://www.chemeurope.com/en/encyclopedia/Humphreys_series.html
https://www.nist.gov/system/files/documents/srd/jpcrd382009565p.pdf
WaveL | Freq | Photon Energy | | |
3.282μm | 91THz | 378meV | begin | Humphreys series |
12.37μm | 24THz | 100meV | end | Humphreys series |
|
Referenced by pages:
hydrogen (H)
spectral line
Index