| Title: | Pd-110/108 RATIOS AND TRACE ELEMENT CHANGES IN PARTICULATE PALLADIUM EXPOSED TO DEUTERIUM GAS |
| DOI No: | 10.1142/9789812701510_0033 |
| Source: | CONDENSED MATTER NUCLEAR SCIENCE (pp 399-403)
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| Author(s): | THOMAS O. PASSELL
TOP Consulting, P.O. Box 336, Palo Alto, CA 94302-0336, USA
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| Abstract: | Changes in Pd-110/108 ratios as well as the concentration of silver, gold, zinc, cobalt, iridium and lithium-7/6 ratios have been measured using neutron activation analysis (NAA) and time of flight secondary ion mass spectrometry (TOF-SIMS) on a set of four samples of particulate palladium exposed to high-pressure deuterium gas in the hollow core of Arata–Zhang cathodes. Three samples were from cathodes producing excess heat (tens of megajoules) over a period of several-months electrolysis, while the fourth was virgin powder from the same batch as that of the active samples. If a nuclear process is the source of these changes, then multi-isotope elements such as silver, zinc, and iridium should show significant deviations in their isotopic ratios from the natural terrestrial values. Surface trace lithium did indeed show such differences from that of the virgin material. The Ag-109/107 ratio is currently under study by accelerator mass spectroscopy (AMS) for the one sample showing the greatest difference in Ag-109 content from that of the virgin material. Since these variations may have explanations unrelated to nuclear reactions, these results are not yet definitive. The 8% increase in the Pd-110/108 ratio for one of the four samples relative to the virgin material is one of the most difficult for which to find a conventional explanation. |
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