"The mind is a compact, multiply connected thought mass with internal connections of the most intimate kind. It grows continuously as new thought masses enter it, and this is the means by which it continues to develop."

Bernhard Riemann On Psychology and Metaphysics ca. 1860

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Friday, August 27, 2010

Who would have thought that the nucleus isn't random? Hmm...

In 2002, Paul Koehler, a physicist at Oak Ridge National Laboratory (ORNL) in Tennesse, and others were measuring neutron resonances in four types of platinum isotopes. These resonance patterns - which are the energies at which the nucleus of a platinum isotope absorbs neutrons - are affected by the motion of the protons and neutrons inside the nucleus. These motions are thought to be chaotic, at least according to random matrix theory, which is used to determine the behavior of large nuclei. However, in a recent study, Koehler and his colleagues found that the protons and neutrons seem to move in a collective way that can't be explained by any known model of nuclear structure.
“The new results suggest that the roughly 200 nucleons inside the platinum nuclei studied act in unison to exhibit regular rather than chaotic properties,” according to a news article from ORNL's website. “Given the relatively high energy and large number of nucleons involved, such collective behavior is totally unexpected and unexplained.”
The researchers say that their results reject the random matrix theory for this data with a 99.997% probability. But to confirm their claim, the scientists need to perform further experiments on the nuclei of other elements besides platinum, which could verify that the discovery is not simply due to an unusual property of platinum nuclei.
However, the problem is that ORELA has been closed due to budget cuts, and is not scheduled to reopen any time soon. The US Department of Energy has said that other research projects are a higher priority for the field of nuclear science. According to Koehler, there is one other place in the world where similar measurements could be made, which is the Geel Electron Linear Accelerator (GELINA) in Geel, Belgium. Here, the physicists could also repeat early experiments regarding random matrix theory performed in the 1970s at Columbia University, and see if the results hold up to modern instruments and analysis methods.
This indeed  gladdens the heart of Thingumbob in a most predictable manner. Rage no more, ye false gods of pseudoscience!

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