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@ -401,3 +401,369 @@
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\label{fig:dicke-countrate}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/5.pgf}
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\caption{}
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\label{fig:dists-5}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/3.pgf}
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\caption{}
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\label{fig:dists-3}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/5.pgf}
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\caption{}
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\label{fig:dists-5}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/3.pgf}
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\caption{}
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\label{fig:dists-3}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/5.pgf}
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\caption{}
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\label{fig:dists-5}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/3.pgf}
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\caption{}
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\label{fig:dists-3}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/countrates.pgf}
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\caption{}
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\label{fig:dists-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/countrates.pgf}
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\caption{}
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\label{fig:dists-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/countrates.pgf}
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\caption{}
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\label{fig:dists-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/widths.pgf}
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\caption{}
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\label{fig:dists-widths}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/countrates.pgf}
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\caption{}
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\label{fig:dists-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/widths.pgf}
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\caption{}
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\label{fig:dists-widths}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/cs.pgf}
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\caption{}
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\label{fig:calibrate-cs}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/ba_1.pgf}
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\caption{}
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\label{fig:calibrate-ba_1}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/ba_2.pgf}
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\caption{}
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\label{fig:calibrate-ba_2}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/ba_3.pgf}
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\caption{}
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\label{fig:calibrate-ba_3}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/am_1.pgf}
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\caption{}
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\label{fig:calibrate-am_1}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/am_2.pgf}
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\caption{}
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\label{fig:calibrate-am_2}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/eu_1.pgf}
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\caption{}
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\label{fig:calibrate-eu_1}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/calibrate/energy_fit.pgf}
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\caption{}
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\label{fig:calibrate-energy_fit}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/hists/am_90.pgf}
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\caption{}
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\label{fig:hists-am_90}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/hists/am_90_0.pgf}
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\caption{}
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\label{fig:hists-am_90_0}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/30.pgf}
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\caption{}
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\label{fig:winkelmessung-30}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/45.pgf}
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\caption{}
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\label{fig:winkelmessung-45}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/60.pgf}
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\caption{}
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\label{fig:winkelmessung-60}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/75.pgf}
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\caption{}
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\label{fig:winkelmessung-75}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/90.pgf}
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\caption{}
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\label{fig:winkelmessung-90}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/105.pgf}
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\caption{}
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\label{fig:winkelmessung-105}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/120.pgf}
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\caption{}
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\label{fig:winkelmessung-120}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/energycurve.pgf}
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\caption{}
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\label{fig:winkelmessung-energycurve}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/crossec/countrates.pgf}
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\caption{}
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\label{fig:crossec-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/crossec/rel_countrates.pgf}
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\caption{}
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\label{fig:crossec-rel_countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/2.pgf}
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\caption{}
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\label{fig:dicke-2}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/4.pgf}
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\caption{}
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\label{fig:dicke-4}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/6.pgf}
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\caption{}
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\label{fig:dicke-6}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/10.pgf}
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\caption{}
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\label{fig:dicke-10}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/20.pgf}
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\caption{}
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\label{fig:dicke-20}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dicke/countrate.pgf}
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\caption{}
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\label{fig:dicke-countrate}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/7.pgf}
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\caption{}
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\label{fig:dists-7}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/9.pgf}
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\caption{}
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\label{fig:dists-9}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/12.pgf}
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\caption{}
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\label{fig:dists-12}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/countrates.pgf}
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\caption{}
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\label{fig:dists-countrates}
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\end{figure}
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\begin{figure}[H]\centering
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\input{../auswertung/figs/dists/widths.pgf}
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\caption{}
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\label{fig:dists-widths}
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\end{figure}
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@ -176,7 +176,7 @@ def find_rates(spec, null, t, mu, sigma):
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N = np.sum(spec[mu - 3*sigma:mu + 3*sigma])
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N0 = np.sum(null[mu - 3*sigma:mu + 3*sigma])
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N_f = (N - N0)/t
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d_N_f = 2*np.sqrt(np.sum((np.sqrt([N, N0])/t)**2))
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d_N_f = np.sqrt(np.sum((np.sqrt([N, N0])/t)**2))
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return N_f, d_N_f
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@ -1,4 +1,4 @@
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\documentclass[draft, slug=CS, room=Andreas-Schubert-Bau\,\ Labor\ 406,
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\documentclass[slug=CS, room=Andreas-Schubert-Bau\,\ Labor\ 406,
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supervisor=Juliane\ Volkmer, coursedate=29.\ 11.\ 2019]{../../Lab_Report_LaTeX/lab_report}
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\title{Comptonstreuung}
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|
@ -419,7 +419,8 @@ theoretischen Erwartungen nach~\ref{eq:photoenergie}. Zu erkennen ist
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eine prinzipielle \"Ubereinstimmung im Verlauf. Die Kalibrierung
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scheint aber im hier betrachteten Bereich nicht optimal zu sein,
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wahrscheinlich aufgrund der wenigen Kalibriermessungen im Bereich um
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\kev{60}.
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\kev{60}. Auch wurde in die Unsicherheit in der Peakbreite bei der
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berechnung der Messabweichungen vernachlässigt.
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\begin{figure}[H]\centering
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\input{../auswertung/figs/winkelmessung/energycurve.pgf}
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|
@ -450,6 +451,27 @@ wie in~\ref{fig:sigmaknkorrigiert} ergeben. Der dritte Messpunkt ist
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von sehr schlechter Qualit\"at, da die Messung ungew\"ohnlich stark
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rauschte und liegt deswegen weitab der Theoriekurve. (Siehe auch~\ref{fig:90})
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\begin{table}[H]
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\centering
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\begin{tabular}{S|SS}
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\toprule
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{\(d\) [\(\si{\milli\metre}\)]} & {\(\dot{N}\)
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[\(\si{\per\second}\)]}
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& {\(\Delta\dot{N}\) [\(\si{\per\second}\)]}\\
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\midrule
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30 & 9.09 & .28 \\
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45 & 6.95 & .20 \\
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60 & 5.11 & .16 \\
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75 & 4.20 & .15 \\
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90 & 1.15 & .11 \\
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105 & 3.77 & .13 \\
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120 & 4.04 & .13
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\end{tabular}
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\caption{Zählrate \(\dot{N}\) Abhängigkeit vom Winkel.}
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\label{tab:ratedurch}
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\end{table}
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\begin{figure}[h]\centering
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\input{../auswertung/figs/crossec/countrates.pgf}
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\caption{Zählraten in Abhängigkeit von \(\mu\).}
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|
@ -477,11 +499,11 @@ in~\ref{fig:dicke-countrate} aufgetragen.
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[\(\si{\per\second}\)]}
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& {\(\Delta\dot{N}\) [\(\si{\per\second}\)]}\\
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\midrule
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2,3 & .63 & .17 \\
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4,4 & 3.43 & .29 \\
|
||||
6,6 & 5.11 & .33 \\
|
||||
10,2 & 9.88 & .40 \\
|
||||
20,4 & 8.13 & .38
|
||||
2,3 & .63 & .08 \\
|
||||
4,4 & 3.43 & .14 \\
|
||||
6,6 & 5.11 & .16 \\
|
||||
10,2 & 9.88 & .20 \\
|
||||
20,4 & 8.13 & .19
|
||||
\end{tabular}
|
||||
\caption{Zählrate \(\dot{N}\) pro Durchmesser \(d\).}
|
||||
\label{tab:ratedurch}
|
||||
|
@ -515,23 +537,73 @@ für fünf verschiedene Abstände zwischen \(l = \SI{3}{\centi\metre}\) und
|
|||
In diesem Versuchsteil war der Winkel erneut \(\vartheta = 60^\circ\) und der
|
||||
Streukörperdurchmesser \(d = \SI{6}{\milli\metre}\).\\
|
||||
|
||||
Folgende Abstände wurden vermessen:
|
||||
Die Zählraten und Peakbreiten wurden analog zu~\ref{sec:wirkquer}
|
||||
ermittelt.\footnote{God save Python.} Die dazugeh\"origen Plots sind
|
||||
in~\ref{sec:anabplot} zu finden.
|
||||
|
||||
Die gemessensenen Zählraten sind in~\ref{tab:abstand} aufgetragen.
|
||||
\begin{table}[H]
|
||||
\centering
|
||||
\begin{tabular}{S|S}
|
||||
\toprule
|
||||
{\(l\) [\(\si{\centi\metre}\)]} & {\(\dot{N}\) [\(\si{\per\second}\)]} \\
|
||||
\midrule
|
||||
3 & \\
|
||||
5 & \\
|
||||
7 & \\
|
||||
9 & \\
|
||||
12 &
|
||||
\end{tabular}
|
||||
\caption{Zählrate \(\dot{N}\) pro Anstand Quelle-Streukörper \(l\).}
|
||||
\label{tab:abstand}
|
||||
\centering
|
||||
\begin{tabular}{S|SS}
|
||||
\toprule
|
||||
{\(l\) [\(\si{\centi\metre}\)]} & {\(\dot{N}\)
|
||||
[\(\si{\per\second}\)]}
|
||||
& {\(\Delta\dot{N}\) [\(\si{\per\second}\)]}\\
|
||||
\midrule
|
||||
3 & {-} & {-} \\
|
||||
5 & {-} & {-} \\
|
||||
7 & 2.49 & .13 \\
|
||||
9 & 2.03 & .12 \\
|
||||
12 & 1.48 & .11
|
||||
\end{tabular}
|
||||
\caption{Zählrate \(\dot{N}\) pro Anstand Quelle-Streukörper \(l\).}
|
||||
\label{tab:abstand}
|
||||
\end{table}
|
||||
|
||||
Da bei gr\"o\ss{}en abst\"anden der \kev{60} Peak verrauscht, wird
|
||||
hier f\"ur die Auswertung der \kev{26} Peak genutzt, der allerdings
|
||||
erst ab \(l=\SI{7}{\centi\meter}\) ausreichende Prominenz aufwies.
|
||||
|
||||
\begin{figure}[h]\centering
|
||||
\input{../auswertung/figs/dists/countrates.pgf}
|
||||
\caption{Zählrate in Abhängigkeit des Abständes des Targets von der Quelle.}
|
||||
\label{fig:dists-countrates}
|
||||
\end{figure}
|
||||
|
||||
\begin{figure}[h]\centering
|
||||
\input{../auswertung/figs/dists/widths.pgf}
|
||||
\caption{Peakbreite in Abhängigkeit des Abständes des Targets von
|
||||
der Quelle. Abweichungen aus Fit Fehler.}
|
||||
\label{fig:dists-widths}
|
||||
\end{figure}
|
||||
|
||||
Nimmt man eine Punktquelle an, so gilt \(\Phi\sim 1/l^2\). Wie
|
||||
in~\ref{fig:dists-countrates} zu erkennen, nimmt die Zählrate mit dem
|
||||
Abstand der Quelle zum Target wie erwartet ab.
|
||||
|
||||
Dahingegen nimmt die Peakbreite, wie in~\ref{fig:dists-widths} zu
|
||||
erkennen mit \(l\) zu. Betrachtet man den Strahlkegel der am Target
|
||||
gestreut wird so verringert sich bei vergr\"o\ss{}erung des Abstandes
|
||||
\(l\) dessen \"Offnungswinkel. Daraus folgt, dass mehr nah bei der
|
||||
zentralen Energie liegende Strahlen den Detektor erreichen. Es w\"ahre
|
||||
innerhalb der Messabweichung auch der umegkehrte Fall m\"oglich. Es
|
||||
l\"asst sich hier also keine entg\"ultige Aussage treffen.
|
||||
|
||||
\section{Fazit}
|
||||
Der Prozess der \cs ist in diesem Versuch in Qualitativer
|
||||
\"ubereinstimmung mit der Theorie untersucht worden. Die Kalibrierung
|
||||
war trotz der rel. gro\ss{}en Anzahl der Messpunkte nicht sehr akurat,
|
||||
wie sich in~\ref{sec:energwinkel} zeigte. Die optimale Messzeit wurde
|
||||
zu gunsten einer z\"ugigen Durchf\"uhrung etwas gering gew\"ahl. Die
|
||||
relativen Unsicherheiten der Zählraten sind dennoch zufriedenstellend
|
||||
ausgefallen (siehe~\ref{fig:countrates}). Die Energien und der
|
||||
Wirkungsquerschnit entsprechen jeweils prinzipiell den Theoretischen
|
||||
zusammenh\"angen, wobei im Falle des Wirkungsquerschnittes
|
||||
Abweichungen zu erwarten waren und auch auftraten.
|
||||
|
||||
Der Einfluss des Streukörperdurchmessers ist gut zu verstehen, der
|
||||
Einfluss des Quellabstandes auf die Peakbreite jedoch kann aus den
|
||||
vorhandenen Daten nicht eindeutig nachvollzogen werden.
|
||||
|
||||
\section{Anhang}
|
||||
\label{sec:anshang}
|
||||
|
@ -652,6 +724,27 @@ Folgende Abstände wurden vermessen:
|
|||
\label{fig:dicke-20}
|
||||
\end{figure}
|
||||
|
||||
\subsection{Plots zur Abh\"angigkeit vom Abstand}
|
||||
\label{sec:anabplot}
|
||||
|
||||
\begin{figure}[H]\centering
|
||||
\input{../auswertung/figs/dists/7.pgf}
|
||||
\caption{}
|
||||
\label{fig:dists-7}
|
||||
\end{figure}
|
||||
|
||||
\begin{figure}[H]\centering
|
||||
\input{../auswertung/figs/dists/9.pgf}
|
||||
\caption{}
|
||||
\label{fig:dists-9}
|
||||
\end{figure}
|
||||
|
||||
\begin{figure}[H]\centering
|
||||
\input{../auswertung/figs/dists/12.pgf}
|
||||
\caption{}
|
||||
\label{fig:dists-12}
|
||||
\end{figure}
|
||||
|
||||
\section{Verzeichnisse}
|
||||
|
||||
\label{sec:literatur}
|
||||
|
|
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Reference in a new issue