Comments on: IceCube season completed with record result

By: Louise Mattice

Louise Mattice — Mon, 30 Mar 2009 06:17:55 +0000

Thank you I understood the entire answer.
Good Luck with you ice cubes

By: kc

kc — Thu, 26 Mar 2009 16:48:40 +0000

Also, for example:

“Starting in 1998, experiments began to show that solar and atmospheric neutrinos change flavors (see Super-Kamiokande, Sudbury Neutrino Observatory). This resolved the solar neutrino problem: the electron neutrinos produced in the sun had partly changed into other flavors which the experiments could not detect.”

http://en.wikipedia.org/wiki/Neutrino

By: kc

kc — Thu, 26 Mar 2009 16:20:19 +0000

As I understand, when a photomultiplier tube sees a light pulse from a nuclear event, the pulse is given a timestamp accurate down to nanoseconds. A neutrino is considered detected when the trail of received light pulses have timestamps that get later in time as the location of the light pulses received goes “up” (toward the earth’s surface). Nuclear particles coming up thru the earth are accepted as possible neutrinos, nuclear particles going “down” (from the surface/sky) are all discarded as not being neutrinos.

By: Louise Mattice

Louise Mattice — Sun, 22 Mar 2009 18:28:41 +0000

I am a 61 year old woman who has loved physics all my life although I did not know the name of what I read about until PBS came into my life. But in 1965 when I wanted to pursue a career in science I was convinced by my parents and school counselor “what future is there in science for a woman and how would you use it when you marry?”

So now I AM GOING TO ASK A SIMPLETON question. How can you tell neutrino’s from the earth’s atmosphere and extra-terrestrial ones? I thought neutrino’s were very difficult to detect at all?

Sorry that this is simple but I am able to understand the basics of string theory.