IEEE Spectrum: New Cold Fusion Evidence Reignites Hot Debate

By | April 1, 2009

On Monday, scientists at the American Chemical Society (ACS) meeting in Salt Lake City announced a series of experimental results that they argue confirms controversial “cold fusion” claims.

Chief among the findings was new evidence presented by U.S. Navy researchers of high-energy neutrons in a now-standard cold fusion experimental setup—electrodes connected to a power source, immersed in a solution containing both palladium and “heavy water.” If confirmed, the result would add support to the idea that reactions like the nuclear fire that lights up the sun might somehow be tamed for the tabletop. But even cold fusion’s proponents admit that they have no clear explanation why their nuclear infernos are so weak as to be scarcely noticeable in a beaker.

The newest experiment, conducted by researchers at the U.S. Space and Naval Warfare Systems Center, in San Diego, required running current through the apparatus for two to three weeks. Beneath the palladium- and deuterium-coated cathode was a piece of plastic—CR-39, the stuff that eyeglasses are typically made from. Physicists use CR-39 as a simple nuclear particle detector.

After the experiment, the group analyzed the CR-39 and found microscopic blossoms of “triple tracks.” Such tracks happen when a high-energy neutron has struck a carbon atom in the plastic, causing the atom to decay into three helium nuclei (alpha particles). The alpha particles don’t travel more than a few microns, though, before they plow into other atoms in the CR-39. The result is a distinctive three-leaf clover that, to physicists, points to the by-product of a nuclear reaction.

“Taking all the data together, we have compelling evidence that nuclear reactions [are happening in the experiment],” says physicist Pamela Mosier-Boss of the Navy group.

… According to Edmund Storms, retired nuclear scientist from Los Alamos National Laboratory and author of The Science of Low Energy Nuclear Reaction (World Scientific, 2007), experiments confirming Pons and Fleischmann’s finding of excess heat have now been published in 150 different papers in journals and conference proceedings around the world. The reported excess heat, he says, ranges from milliwatts up to 180 watts. 
…

Ludwik Kowalski, formerly a physics professor at New Jersey’s Montclair State University, now retired, says that throughout the 1990s and into the 2000s, he was as skeptical as anyone about cold fusion. But in 2007, he conducted his own CR-39 experiment, as described in an earlier paper by the U.S. Navy group.

“I got the same result they got, exactly,” Kowalski says, noting that the CR-39 tracks he saw traced the outline of the cathode wire and were highly suggestive of nuclear activity. “Now I think there are serious indications that there is something behind this.”

via IEEE Spectrum: New Cold Fusion Evidence Reignites Hot Debate.

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