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| DescriptionHydrogen-SpinFlip.svg |
English: Ground state hyperfine levels of hydrogen (parallel and antiparallel) with the spin-flip transition, emitting radiation at 1420 MHz. The corresponding wavelength is 21 cm. (21-cm line, hydrogen line)
Deutsch: Wasserstoff im Grundzustand, mit magnetisch paralleler (F=1) und antiparalleler (F=0) Einstellung des Elektrons (Hyperfeinstruktur). Durch den Spin-Flip-Übergang wird ein Energiebetrag frei, der einer Frequenz von 1420 MHz entspricht. Wegen der zugehörigen Wellenlänge von 21 cm wird die Strahlung auch 21-cm Linie genannt (alternativ: Wasserstofflinie, HI-Linie).
Русский: Переход между сверхтонкими уровнями атома водорода в основном состоянии (параллельные и антипараллельные спины электрона и протона). При переходе испускается излучение на частоте 1420 МГц. соответствующее длине волны 21 см, так называемая линия нейтрального водорода 21 см.
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| Date | |
| Source | Own work |
| Author | Tiltec |
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| SVG development InfoField |
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:43, 18 January 2009 | | 374 × 342 (47 KB) | Tiltec~commonswiki | ({{Information |Description={{en|1=Ground state hyperfine levels of hydrogen (parallel and antiparallel) with the spin-flip transition, emitting radiation at 1420 MHz. The corresponding wavelength is 21 cm. (21-cm line, hydrogen line)}} {{de|1=Wasserstoff |
| 16:21, 18 January 2009 |  | 374 × 342 (41 KB) | Tiltec~commonswiki | {{Information |Description={{en|1=Ground state hyperfine levels of hydrogen (parallel and antiparallel) with the spin-flip transition, emitting radiation at 1420 MHz. The corresponding wavelength is 21 cm. (21-cm line, hydrogen line)}} {{de|1=Wasserstoff |
