HE2 Double Ionized Helium Spectra 1640 Nanometers

helium holds onto its electrons very very tightly i'll come back to that if you continue to heat the thing then it will lose both of its electrons. It produces a spectral line of wavelength 1640 nanometers there we go okay so what does the abstract say let's read through this cosmic hydrogen reionization and cosmic production of first metals are major phase transitions in the universe occurring during the first billion years after the big bang end quote.