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From: Just A Guy on 9 May 2010 04:56
>>> We show that cavitation of a solution of thorium-228 in water induces
>>> its transformation at a rate 10^4 times faster than the natural
>>> radioactive decay would do. [snippage]
>>
>> Thorium-228 has a half-life of 1.9116 years = 60325508 seconds.
>>
>> If the authors claim about this short lived isotope is true,
>> ultrasonication would reduce its half life to 6033 seconds.
>>
>> The fact that a short lived isotope of thorium was claimed, may have been
>> missed by responders.
>>
>> Given the short half life, activation energy for nuclear processes would
>> be smaller than expected.
>
> Whoops, there's more, see:
> http://en.wikipedia.org/wiki/Thorium-228
>
> "Occasionally it decays by the unusual route of cluster decay, emitting a
> nucleus of oxygen-20."
>
> It is plausible that ultrasonication of Th-228 excites low activation
> cluster decay.

This may be a way to accelerate the decay of short lived isotopes. But any
serious work would need to be done by robots. The risks of volcanic
eruptions of highly radioactive solutions are obvious.


From: Dirk Bruere at NeoPax on 9 May 2010 09:37
On 09/05/2010 09:29, Just A Guy wrote:
>> [snippage]
>>
>>> Abstract
>>
>>> We show that cavitation of a solution of thorium-228 in water induces
>>> its transformation at a rate 10^4 times faster than the natural
>>> radioactive decay would do. [snippage]
>>
>> Thorium-228 has a half-life of 1.9116 years = 60325508 seconds.
>>
>> If the authors claim about this short lived isotope is true,
>> ultrasonication would reduce its half life to 6033 seconds.
>>
>> The fact that a short lived isotope of thorium was claimed, may have been
>> missed by responders.
>>
>> Given the short half life, activation energy for nuclear processes would
>> be smaller than expected.
>
> Whoops, there's more, see:
> http://en.wikipedia.org/wiki/Thorium-228
>
> "Occasionally it decays by the unusual route of cluster decay, emitting a
> nucleus of oxygen-20."
>
> It is plausible that ultrasonication of Th-228 excites low activation
> cluster decay.

Depends what is happening in the cavitation bubble.
The temps there are high enough to emit soft x-rays

--
Dirk

http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
From: dlzc on 9 May 2010 15:29
Dear Just A Guy:

On May 9, 1:29 am, "Just A Guy" <Jus...(a)hushmail.com> wrote:
> > [snippage]
>
> >> Abstract
>
> >> We show that cavitation of a solution of thorium-228
> >> in water induces its transformation at a rate 10^4
> >> times faster than the natural radioactive decay
> >> would do. [snippage]
>
> > Thorium-228 has a half-life of 1.9116 years =
> > 60325508 seconds.
>
> > If the authors claim about this short lived isotope is true,
> > ultrasonication would reduce its half life to 6033 seconds.

It isn't true. The signal equals the noise.

> > The fact that a short lived isotope of thorium was
> > claimed, may have been missed by responders.
>
> > Given the short half life, activation energy for nuclear
> > processes would be smaller than expected.
>
> Whoops, there's more, see:
> http://en.wikipedia.org/wiki/Thorium-228
>
> "Occasionally it decays by the unusual route of cluster
> decay, emitting a nucleus of oxygen-20."
>
> It is plausible that ultrasonication of Th-228 excites
> low activation cluster decay.

Then bombarding it with x-rays should elicit decay. Since that
doesn't happen, it is just "cold fission".

David A. Smith
From: Martin Brown on 10 May 2010 06:43
Mark Thorson wrote:
> dlzc wrote:
>> Also see:
>> http://arxiv.org/abs/0909.2141
>
> That one is where the train leaves the tracks,
> as far as I'm concerned. Maybe I could believe
> accelerated decay, but decay without gamma
> emission is a bit too much.

It would be a lot easier to believe that cavitation can produce pits in
CR39 detector sheets that could be mistaken for alpha particle tracks.

Regards,
Martin Brown
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