This week's questions are about the neutrinos
reading for this JIT is section 18(4) and page 418 and the article linked in #2 below (and on web page) 1. The second experiment (after chlorine) that was used to detect neutrinos used a water detector (Kamiokande). The first experiment effected a chemical change (chlorine to argon). a) How was this second (water) experiment different? What lab was it like in first trimester physics? b) What new thing did it tell us about the neutrinos that the chlorine experiment couldnt tell us?
2. Another water-detection experiment described here (there's also a separate link on the web page) was one of the two that shared half (with the chlorine experiment) of 2002's Nobel prize in physics. After reading the article, summarize in a few sentences what the experiment revealed a) about the muon neutrino and on what basis that conclusion was reached. b) about the electron neutrino and on what basis that conclusion was reached
3. If you look at the neutrino capture reactions on page 23 of the green book (in the bottom table), you see a column labeled threshold energy. That is the minimum energy that the neutrino must bring in to make the reaction occur. Why do these reactions have a threshold energy? (or where does this energy go after the reaction happens?)
[ and of course the very next question I will ask in class is why was chlorine a poor choice to detect neutrinos ?? and if it was a poor choice, why did we do it?]
I did my own work on this JIT.
Click on the button to send the results to Kolena or click to start over.
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