https://www.physlab-wiki.com/ 2026-04-25T11:03:00+00:00 https://www.physlab-wiki.com/ https://www.physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2022-06-06T12:24:55+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.physlab-wiki.com/phylabs/lab_courses/phys-154-wiki-home/experiment_6_gamma_spectroscopy/start?rev=1654532695&do=diff 1 Goals ---------- In this experiment we will study the following: * how gammas interact with matter; * how gammas produce light in a NaI(Tl) crystal; * how a photomultiplier tube (PMT) uses light to produce electrons and amplifies the number of electrons;$E' = \dfrac{E}{1+\frac{E}{mc^2}\left(1-\cos\theta\right)}$$mc^2 = 0.511 \;\mathrm{MeV}$$E$$E'$$\theta$$\lambda$$N_0$$N = N_0 e^{-\lambda x}$$x$$\gamma = \dfrac{1}{\sqrt{1-{v^2}/{c^2}}} = 1 + \dfrac{\mathrm{kinetic\; energy}}{\mathrm{r…