Next ionized helium line: ionized helium Paschen line     Up: ionized helium line, spectral series line    Previous ionized helium line: ionized helium Balmer line    
   | 
| ionized helium Lyman line comparison table | 
| Subject | 
has lower energy level | 
has specie | 
has equivalent width | 
has unit | 
has value | 
occurs in | 
has series limit | 
has wavelength | 
has transition | 
has width | 
is an instance of | 
| He II Lyman alpha | 1 | ionized helium (He II) |   | radiation unit |   |   | 227 Å | 303.78 Å |   |   | ionized helium Lyman line | 
Next ionized helium line: ionized helium Paschen line     Up: ionized helium line, spectral series line    Previous ionized helium line: ionized helium Balmer line