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Spectral-irradiance calibration of continuum emitted from rareearth plasmas.

The spectral irradiance of laser-produced plasmas of gadolinium and ytterbium have been determined in the 115-220-nm range for an incident 2.2-J, 30-nsec ruby-laser pulse. The effects of target geometry arnd variation of laser energy on the spectral irradiance were also studied. The potential of the source as a radiometric standard is discussed.