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Author Topic: Is there such a thing as low energy neutrinos?  (Read 1341 times)

Offline Atomic-S

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Is there such a thing as low energy neutrinos?
« on: 23/08/2012 01:46:43 »
Can neutrinos exist with substantially less energy than is typical of particles emitted by nuclear reactions?
« Last Edit: 29/08/2012 00:04:19 by chris »


 

Offline imatfaal

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Re: Is there such a thing as low energy neutrios?
« Reply #1 on: 23/08/2012 16:37:43 »
There are certainly different energy neutrinos - and it seems we can detect low energy neutrinos

http://www.nature.com/news/2007/070820/full/news070820-5.html

I will have to read up on why they are low energy rather than normal
 

Offline imatfaal

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Re: Is there such a thing as low energy neutrios?
« Reply #2 on: 23/08/2012 16:46:51 »
Quote
The low energy neutrinos are mainly produced in nuclear processes, like the fusion reactions in the sun or in the center of an exploding Supernova. The high energy neutrinos are mainly produced in high energy particle collisions producing short lived mesons, decaying to neutrinos and other particles.

http://www.nobelprize.org/nobel_prizes/physics/articles/hulth/
 

Offline evan_au

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Re: Is there such a thing as low energy neutrios?
« Reply #3 on: 24/08/2012 12:37:29 »
Yes - it is believed that just like the Cosmic Microwave Background Radiation, there are neutrinos left over from the Big Bang, with a temperature below 2 degrees Kelvin. Although they are believed to be millions of times more common than neutrinos from the Sun, they have not yet been detected in the laboratory. http://en.wikipedia.org/wiki/Neutrino#Big_Bang

It is now known that neutrinos have a rest mass (=rest energy, different from their kinetic energy), and it is possible that the 3 flavours of neutrino may have different rest masses. However, this energy is very small, and difficult to measure.
http://en.wikipedia.org/wiki/Neutrino#Mass
 

Offline imatfaal

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Re: Is there such a thing as low energy neutrios?
« Reply #4 on: 24/08/2012 15:47:42 »
Evan - didn't know of that form of neutrino, many thanks.  I think you are quite correct the three flavour all have mass -and I think they must also be distinct - what we see is one of the many super-positions of the three flavours
 

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Re: Is there such a thing as low energy neutrios?
« Reply #4 on: 24/08/2012 15:47:42 »

 

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