Intercalibration of 4He and 5Li nuclear thermometers for hot nuclei.

For hot nuclei with [ital A][congruent]120, a comparison is made between nuclear temperatures derived from spectral slope parameters for well-characterized equilibrated systems and those derived from state population ratios. When suitable account is taken of the deexcitation cascade, the two techniques lead to similar results, confirming the utility of the state ratio method. The general relationship between the measured quantities and the initial temperature for medium to heavy mass hot nuclei is discussed and a calibration of these is presented for measurements based on [sup 4]He and [sup 5]Li detection.