Date: May 1976
Creator: Fred, Mark; Tompkins, Frank S.; Blaise, Jean E.; Camus, Pierre & Verges, Jean
Description: A description and interpretation of the atomic spectrum of neptunium are given. Wavelengths were measured for 6096 spectrum lines in the range 3793 to 38,812 cm⁻¹ (26,353 to 2575 A), of which 2526 were classified as transitions between 329 odd levels and 130 even levels of neutral neptunium (Np I). The data are presented in five tables.
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