On the excitation mechanism of the 21 cm interstellar hydrogen emission line
โ Scribed by S.A. Wouthuysen
- Publisher
- Elsevier Science
- Year
- 1952
- Weight
- 110 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0031-8914
No coin nor oath required. For personal study only.
๐ SIMILAR VOLUMES
Ha filtergrams of the chromosphere show an emission rim in many hydrogen filaments. We suppose that formation of this rim is due to photospheric radiation reflected by the filament in the direction of the chromosphere. The calculations show that: (1) the maximum contrast of the rim relative to the u
Some spectroscopic properties of PbFa+ GeOz : ErFs glass ceramics under green line ( 19436 cm-' ) excitation were investigated at room temperature. Both absorption and emission spectra have been measured. The up-conversion of green radiation into violet (26455 cm-') and blue (24582 cm-') emission fr