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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.