Re-examination of the spectrum of strontium: autoionization in the spectrum of neutral strontium

Abstract

The spectrum of strontium has been re-examined within the range 2100 AA to 26000 AA. A large number of new lines have been observed and many of these are diffuse. This has led to the identification of new energy levels including the even parity autoionizing levels arising from the 4d5d configuration. A complete list is presented of Sr I and Sr II wavelengths observed within range 7800 AA to 26000 AA together with approximate intensities.