wavelength, wavenumber or frequency at which the total energy emitted by a sample as heat does not change upon a chemical reaction in or a physical change of the sample. Its position depends on the experimental conditions.
Note:
The spectral differences between the @I03310@ points and the iso-optoacoustic points are the result of the non-linear relationship between the @M03972@ and the photoacoustic signal.
Source:
PAC, 2007, 79, 293. 'Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)' on page 358 (https://doi.org/10.1351/pac200779030293)