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abstraction > mathematical concept > number > quantity > radiation measurement > spectral feature > spectral line > ionized helium line > Pickering line
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Pickering line comparison table
Subject has wavelength
Pi alpha10124 Å
Pi beta6560 Å

Next ionized helium line: ionized helium Balmer line    Up: ionized helium line, spectral series line    Previous ionized helium line: ionized helium Paschen line