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Testing the hypothesis: If cold fusion is taking place, we would also expect to neutrons or helium-4 generated.
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![Top row with phrases in green bubbles correspond to image below. First column "Hypothesis/theory" with an image of D particles inside a palladium rod and “Cold fusion is taking place in the palladium”. The next column shows “Expected results/observations” with a thermometer at a high heat. “We expect to see heat generated.” In the next column, we see “equal to or not equal” to “Actual results/ observations” which shows the same.](https://undsci.berkeley.edu/wp-content/uploads/2022/08/40104_evo_resources_resource_image_156_original-350x239.gif)
Testing the idea of cold fusion (1 of 6)
Testing the hypothesis: If cold fusion is taking place, then we would expect to see heat generated.![Comparing different results of Pon's and Jone's work on cold fusion.](https://undsci.berkeley.edu/wp-content/uploads/2022/08/42399_evo_resources_resource_image_158_original-350x350.gif)
Testing the idea of cold fusion (3 of 6)
Pons' neutron results didn't agree with his heat measurements, with Jones' neutron results, or with established nuclear theory, which suggested no fusion should be occurring at all!![The evidence of cold fusion leads a question mark about what will be observed.](https://undsci.berkeley.edu/wp-content/uploads/2022/08/84739_evo_resources_resource_image_182_original-350x239.gif)
Testing the idea of cold fusion (4 of 6)
Testing the hypothesis: Could cold fusion really be taking place, or had Pons and Fleischmann made a mistake?![The expected observation of elevated helium-4 levels was not actually observed.](https://undsci.berkeley.edu/wp-content/uploads/2022/08/47942_evo_resources_resource_image_159_original-350x239.gif)
Testing the idea of cold fusion (5 of 6)
Testing the hypothesis: If cold fusion is taking place, we would expect elevated levels of helium-4 in the palladium rod.![As cold fusion takes place, we expect to see neutrons released, however none are released.](https://undsci.berkeley.edu/wp-content/uploads/2022/08/2492_evo_resources_resource_image_160_original-350x246.gif)