Replication experiments at tohoku university on anomalous heat generation using nickel-based binary nanocomposites and hydrogen isotope gas

Y. Iwamura, T. Itoh, J. Kasagi, A. Kitamura, A. Takahashi, K. Takahashi

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


We built a new experimental system to replicate the anomalous heat generation experiments based on the papers by A. Kitamura and A. Takahashi. The system was developed in order to measure precisely heat generation using a flow-calorimetry method with liquid hydrocarbon coolant that enables us to measure at temperatures higher than 373 K. The Ni-based binary nano-composite samples were prepared by the melt spinning method. A fabricated material at Kobe University were separated into two samples. One sample was loaded and tested at Tohoku University and the other at Kobe University, in order to compare the experimental results at the two different places. Two experiments were performed up to now. One was the PNZ4s (Pd0:044Ni0:31Zr0:65) with D2 gas experiment and the other is the CNZ5s (Cu0044Ni031Zr065) with H2 gas experiment. For the PNZ4s with D2 gas experiment, excess heat up to 10 W was observed. The amount of excess energy reached 2.5 MJ and it corresponded to 14.9 eV per absorbed D. CNZ5s (Cu0044Ni031Zr065) with H2 gas experiment also showed anomalous excess heat ranging from 2 to 5 W. Coincident increase events of the pressure of reaction chamber and gas temperature, which suggested high temperature gas generation in the reactor chamber, was observed many times. The amount of excess energy amounted to 1.9 MJ and the generated energy per hydrogen atom was estimated as 67.8 eV/H. For the both samples subjected to the same fabrication process, results of the present work qualitatively agreed with those of the similar experiment performed at Kobe University. And these observations are supposed to be very difficult to explain by known chemical processes only.

Original languageEnglish
Pages (from-to)191-201
Number of pages11
JournalJournal of Condensed Matter Nuclear Science
Publication statusPublished - 2017 Oct 1
Event20th International Conference on Condensed Matter Nuclear Science, ICCF 2016 - Sendai, Japan
Duration: 2016 Oct 22016 Oct 7


  • Anomalous heat
  • Deuterium gas
  • Gas loading
  • Hydrogen gas
  • Ni-based binary nano-composites
  • Replication

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Condensed Matter Physics


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