Relative Measurement of the Photodetachment Cross Section forH

Abstract
The spectral dependence of the photodetachment cross section for the negative ion of atomic hydrogen has been measured in the range from 4000 A to 13 000 A with approximately 300-A resolution. Measurements were made with twenty-five band pass filters, each measurement taken relative to the value obtained with a control filter at 5280 A. A probable error of about 2% is attached to the relative value obtained for each filter. The results are in significant disagreement with available calculated cross sections.