SU: Strange case of solar flares and radioactive elements

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SU: Strange case of solar flares and radioactive elements

Post by bystander » Wed Aug 25, 2010 7:33 pm

The strange case of solar flares and radioactive elements
Stanford University | 25 Aug 2010
When researchers found an unusual linkage between solar flares and the inner life of radioactive elements on Earth, it touched off a scientific detective investigation that could end up protecting the lives of space-walking astronauts and maybe rewriting some of the assumptions of physics.

It's a mystery that presented itself unexpectedly: The radioactive decay of some elements sitting quietly in laboratories on Earth seemed to be influenced by activities inside the sun, 93 million miles away.

Is this possible?

Researchers from Stanford and Purdue University believe it is. But their explanation of how it happens opens the door to yet another mystery.

There is even an outside chance that this unexpected effect is brought about by a previously unknown particle emitted by the sun.

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Re: SU: Strange case of solar flares and radioactive element

Post by Henning Makholm » Thu Aug 26, 2010 1:53 am

Interesting. It doesn't sound too outrageous that the beta decays of 32Si and 54Mn could be stimulated by neutrino capture. Similar (but energy-consuming) reactions are known for 71Ga and 37Cl. But 226Ra is also reported to be affected, and it alpha decays!
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Scientist Smackdown: Are Solar Neutrinos Messing With Matter

Post by bystander » Thu Aug 26, 2010 3:41 pm

Scientist Smackdown: Are Solar Neutrinos Messing With Matter?
Discover Blogs | 80beats | 26 Aug 2010
The sun is breaking the known rules of physics—so said headlines that made the rounds of the Web this week.

That claim from a release out about a new study by researchers Jere Jenkins and Ephraim Fischbach of Purdue, and Peter Sturrock of Stanford. The work suggests that the rates of radioactive decay in isotopes—though to be a constant, and used to date archaeological objects—could vary oh-so-slightly, and interaction with neutrinos from the sun could be the cause. Neutrinos are those neutral particles that pass through matter and rarely interact with it; trillions of neutrinos are thought to pass through your body every second.

In the release itself, the researchers say that it’s a wild idea: “‘It doesn’t make sense according to conventional ideas,’ Fischbach said. Jenkins whimsically added, ‘What we’re suggesting is that something that doesn’t really interact with anything is changing something that can’t be changed.’”

Could it possibly be true? I consulted with Gregory Sullivan, professor and associate chair of physics at the University of Maryland who formerly did some of his neutrino research at the Super-Kamiokande detector in Japan, and with physicist Eric Adelberger of the University of Washington.

“My gut reaction is one of skepticism,” Sullivan told DISCOVER. The idea isn’t impossible, he says, but you can’t accept a solution as radical as the new study’s with just the small data set the researchers have. “Data is data. That’s the final arbiter. But the more one has to bend [well-establish physics], the evidence has to be that much more scrutinized.”
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Fischbach and Jenkins, who have published a series of journal articles supporting their theory on neutrinos and radioactive decay, emailed DISCOVER to respond to these criticisms of their work.
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But for Adelberger of the University of Washington, that is still a huge jump based on what the studies have seen. Adelberger tells DISCOVER that he thinks the variation in decay that the labs like Brookhaven picked up is real. But he agrees with Sullivan that the effect is much more likely to come from a problem with the instruments than some new physics from the sun. He also points to studies over the last couple years (here and here) that show no link between the sun and radioactive decay rates.

Both Adelberger and Sullivan agreed that the Purdue-Stanford findings pave the way to some interesting—and more carefully controlled—research to verify or falsify the idea. But for now, neither is a believer.

“The scenarios Fischbach et. al. invoke to support their interpretations despite contrary data are getting bizarre,” Adelberger tells DISCOVER. “I think it is unlikely to be correct.”

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