Abstract
An analysis of the interstellar feature near 1088 A in spectra obtained with the Copernicus satellite suggests that neutral chlorine is the absorber. The mean wavelength, as determined from 15 lines of sight, of 1088.052 + or - 0.023 A compares favorably with the chlorine line at 1088.062 A. A strong correlation with Cl I 1347 A indicates an oscillator strength for 1088 A of 0.04. Above a threshold at N(H2) of roughly 10 to the 19th/sq cm, the equivalent width of 1088 A varies approximately with N(H2). The variation with H2 is similar to the variation of Na I and C I with H2.
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