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In order to investigate the anomalous heat effect (AHE) in NiCu multilayerthin film, photon radiation calorimetry has been developed. Three types ofphoton detectors are employed to cover a wide range of wavelengths from 0.3 nmto 5.5 um, i.e., photon energies from 0.2 to 1.8 eV. In the present work, theusefullness of the calorimetry is demonstrated for excess heat measurementswith samples of Ni pure, NiCu composite layers, and Cu layer deposited on theNi substrate. Direct comparisons of photon radiation spectra with and withoutH2 easily showed sample-specific differences in excess heat power. The samplesof NiCu composite layer produced larger excess heat. By incorporating themeasured radiant power into a heat flow model, the excess heat was deduced tobe 4 - 6 W. The energy generated in 80 hours reached to 520 +/- 120 kJ: thegenerated energy per hydrogen was at least 460 +/- 108 keV/H atom. This isdefinitely not a chemical reaction, but producing energy at the level ofnuclear reactions.

Photon radiation calorimetry for anomalous heat generation in NiCu multilayer thin film during hydrogen gas desorption