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bananas Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-31-08 01:21 PM
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Nuclear Decay May Vary With Earth-Sun Distance
"We've long thought that nuclear decay rates are constant regardless of ambient conditions (except in a few special cases where beta decay can be influenced by powerful electric fields). So that makes it hard to explain two puzzling experiments from the 1980s that found periodic variations over many years in the decay rates of silicon-32 and radium-226. Now a new analysis of the raw data says that changes in the decay rate are synchronized with each other and with Earth's distance from the sun. The physicists behind this work offer two theories to explain why this might be happening (abstract). First, some theorists think the sun produces a field that changes the value of the fine structure constant on Earth as its distance from the sun varies. That would certainly affect the rate of nuclear decay. Another idea is that the effect is caused by some kind of interaction with the neutrino flux from the sun's interior which also varies with distance. Take your pick. What makes the whole story even more intriguing is that for years physicists have disagreed over the decay rates of several isotopes such as titanium-44, silicon-32, and cesium-137. Perhaps they took their data at different times of the year?"

http://science.slashdot.org/article.pl?sid=08/08/29/1227239

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jgraz Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-31-08 01:24 PM
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1. whoa!
This shit just keeps getting weirder. And they haven't even fired up the LHC yet.
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caraher Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-31-08 08:04 PM
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2. Yet another "fine structure constant may not be constant" thing?
The full paper... I used to work with one of the authors; I should call him up for a chat sometime...
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TechBear_Seattle Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Aug-31-08 10:31 PM
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3. Wow, I thought I made that stuff up years ago
In the science I've worked out for my science fiction novel, it turns out that the universe is (or at least operates as if) ten dimensions "woven" into three "fabrics" which, in turn, are "woven" to make up the universe. It is possible, within sharp limits, to poke and prod at these "threads" and locally give rise to different properties in the universe, which allows for cold fusion and faster than light travel. It turns out that dark matter, dark energy and even gravity itself are natural occurances of this localized variation.

To think that my fictional science might not be so fictional after all. :wow:
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caraher Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Sep-05-08 11:17 PM
Response to Reply #3
5. I don't think any of the proposed mechanisms from the paper were quite that exotic!
One of them, I recall, suggested that the decay rates might be affected by solar neutrino flux, which in turn depends on Earth-sun distance.

Or maybe the "laws" we know are at least somewhat "local." :)
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Nihil Donating Member (1000+ posts) Send PM | Profile | Ignore Fri Sep-05-08 03:39 AM
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4. Kick for a fascinating thought (n/t)
:wow:
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