Summary
In a galvanostatic experiment of charging deuterium in a palladium cathode, nuclear and thermal effects were found. A sintered palladium electrode shaped as a parallelepiped was used. After six days of electrolysis at 200 mA/cm2, a simultaneous emission of neutrons, tritium excess in the electrolytic solution and temperature rapid increase were observed. During the event which lasted 4 minutes, we estimated an emission of 7.2·105 neutrons while the electrode temperature reached 150°C. Excess of tritium was evaluated to be (2.14±0.04)·1011 atoms. If the energy released as heat, 176 J, is compared with the energy associated to the d+d reactions, 0.1J, three orders of magnitude are still defective. Electrode characterization after the events is reported.
Riassunto
In un esperimento galvanostatico di caricamento di deuterio in un catodo di palladio, sono stati osservati effetti nucleari e termici. È stato usato un elettrodo di palladio sinterizzato a forma di parallelepipedo. Dopo sei giorni di elettrolisi a 200 mA/cm2, è stata osservata simultaneamente una emissione di neutroni ed un rapido incremento della temperatura dell'elettrodo; un eccesso di trizio è stato trovato nella soluzione elettrolitica dello stesso esperimento. Durante l'evento, durato 4 minuti, abbiamo stimato una emissione di 7.2×105 neutroni mentre la temperatura dell'elettrodo ha raggiunto 150°C. L'eccesso di trizio è stato stimato in (2.14±0.04)×1011 atomi. L'energia rilasciata come calore, 176J, è di tre ordini di grandezza superiore a quella, 0.1J, associata ai prodotti della reazione d+d. Viene riportata infine una caratterizzazione dell'elettrodo dopo l'evento.
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References
M. Fleishmann, S. Pons andM. Hawkins:J. Electroanal. Chem.,261, 301 (1989).
S. E. Jones, E. P. Palmer, J. B. Czirr, D. L. Decker, G. L. Jensen, J. M. Thorne, S. F. Taylor andJ. Rafelsky:Nature,338, 737 (1989).
J. W. Leake:Nucl. Instrum. Methods,63, 329 (1968).
D. Gozzi et al.: paper in preparation.
A. J. Appleby, S. Srinivasan, O. J. Murphy andC. R. Martin:Evidence for excess heat generation rates during electrolysis of D2Oin LIODusing a palladium cathode. A microcalorimetric study, inWorkshop on Cold Fusion Phenomena, May 22–25, Santa Fé, NM.
J. O'M. Bockris, N. Packham, O. Velev, G. Lin, M. Szklarzcyck andR. Kainthla:Seven chemical explanations of the Fleischmann-Pons effect, inWorkshop on Cold Fusion Phenomena, May 22–25, Santa Fé, NM.
A. Belzner, U. Bischler, S. Crouch-Baker, T. M. Gur, G. Lucier, M. Screiber andR. A. Huggins:Two fast mixed-conductor systems-deuterium and hydrogen in palladium. Thermal measurements and experimental considerations, inWorkshop on Cold Fusion Phenomena. May 22–25, Santa Fé, NM.
J. O'M. Bockris et al.: private communication.
D. C. Bailey:Gammas from cold nuclear fusion, inWorkshop on Cold Fusion Phenomena, May 22–25, Santa Fé, NM, submitted for publication.
P. H. Stelson andF. K. McGowan:Phys. Rev.,99, 112 (1955).
G. De Maria, G. Balducci, A. Capalbi andM. Guido:Proc. Br. Ceram. Soc.,8, 27 (1967);R. T. Grimely: inThe Characterization of High-Temperature Vapors, edited byJ. L. Margrave (Wiley-Interscience, New York, N.Y., 1967), p. 195.
O. Loebich jr. andCh. J. Roub:J. Less Common Metals,55, 67 (1977).
J. R. Oppenheimer andM. Phillips:Phys. Rev.,48, 500 (1935).
J. M. Blatt andV. F. Weisskopf:Theoretical Nuclear Physics (John Wiley and Sons, New York, N.Y. and London, 1952), Chapt. IX.6.
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Gozzi, D., Cignini, P.L., Petrucci, L. et al. Evidences for associated heat generation and nuclear products release in palladium heavy-water electrolysis. Nuov Cim A 103, 143–154 (1990). https://doi.org/10.1007/BF02902625
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DOI: https://doi.org/10.1007/BF02902625