Re: [Phys-l] (no subject) neutrinos

["Paul Lulai" <plulai@stanthony.k12.mn.us>]

That interaction is how the MINOs detector in Tower MN works (and I assume multiple other detectors).  Neutrinos interacting with atoms within metal plates.  Charges move, light is moved through frequency shifting fiber optic and picked up by photomultipler tube (my understanding).

Paul Lulai
Physics Teacher
St Anthony Village S.H.
3303 33rd Ave NE
St Anthony Village, MN 55418

612-706-1146
plulai@stanthony.k12.mn.us
http://www.stanthony.k12.mn.us/hsscience/ ;


-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Bill Nettles
Sent: Friday, February 25, 2011 11:47 AM
To: Forum for Physics Educators
Subject: Re: [Phys-l] (no subject) neutrinos


> bounces@carnot.physics.buffalo.edu] On Behalf Of carmelo@pacific.net.sg
> Sent: Thursday, February 24, 2011 9:46 PM
> To: phys-l@carnot.physics.buffalo.edu
> Subject: Re: [Phys-l] (no subject)
>
> A neutrino may pass through a light year of lead and yet not be
> stopped by any of the lead atoms. This does not mean that neutrino is
> always 100% unstoppable?

[Bill Nettles] Did you mean to have the question mark there?

While it's true that the mean free path of a neutrino produced in a typical beta decay is on the order of a light-year of lead, that also means that out of population of neutrinos a large fraction of that population DO interact and ARE stopped. 
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