Pickering series

The Pickering series consists of three lines of singly ionized helium found, usually in absorption, in the spectra of hot stars like Wolf-Rayet stars. The name comes from Edward Charles Pickering. The lines are produced by transitions of an electron with principal quantum number n=4 state from a higher energy level. The lines have wavelengths:

单词	Pickering series
释义	Pickering series 英语百科 Pickering series The Pickering series consists of three lines of singly ionized helium found, usually in absorption, in the spectra of hot stars like Wolf-Rayet stars. The name comes from Edward Charles Pickering. The lines are produced by transitions of an electron with principal quantum number n=4 state from a higher energy level. The lines have wavelengths:
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