Decay

This diagram shows the decay chain for ${}^{220}$Rn with the decay energy and time of the daughter nuclei. I used this diagram in my thesis. \newcommand{\nucl}[2]{${}^{#2}{\text{#1}}$} \begin{tikzpicture}[ nucleus/.style={scale=.7,thick,draw,rectangle,minimum height=1cm,minimum width=2cm,align=flush center,fill=gray!10}, decay/.style={thick,->,align=flush center,color=blue!80,font=\tiny} ] \node[nucleus] (Th228) {\nucl{Th}{228} \\ 1.91 yr}; \node[nucleus,below=6mm of Th228] (Ra224) {\nucl{Ra}{224} \\3.66 d}; \node[nucleus,below=6mm of Ra224] (Rn220) {\nucl{Rn}{220} \\55.4 s}; \node[nucleus,below=6mm of Rn220] (Po216) {\nucl{Po}{216} \\0.145 ns}; \node[nucleus,below=6mm of Po216] (Pb212) {\nucl{Pb}{212} \\10.6 h}; \node[nucleus,right=12mm of Po216] (Bi212) {\nucl{Bi}{212} \\ 60.5 m}; \node[nucleus,below=6mm of Bi212] (Tl208) {\nucl{Tl}{208} \\ 3.05 m}; \node[nucleus,right=36mm of Rn220] (Po212) {\nucl{Po}{212} \\ 60.5 m}; \node[nucleus,below=6mm of Po212] (Pb208) {\nucl{Pb}{208} \\ 3.05 m}; \draw[decay] (Th228) -- node [right] { $\alpha$ \tiny 5520keV} (Ra224); \draw[decay] (Ra224) -- node [right] { $\alpha$ \\ \tiny 5520keV} (Rn220); \draw[decay] (Rn220) -- node [right] { $\alpha$ \\ \tiny 5520keV} (Po216); \draw[decay] (Po216) -- node [right] { $\alpha$ \\ \tiny 5520keV} (Pb212); \draw[decay] (Po212) -- node [right] { $\alpha$ \\ \tiny 5520keV} (Pb208); \draw[decay] (Bi212) -- node [right] { $\alpha$ \\ \tiny 5520keV} (Tl208); \draw[decay] (Pb212.east) -- node [below] { $\beta$ \\ \tiny 570keV} (Bi212.west); \draw[decay] (Bi212.east) -- node [below] { $\beta$ \\ \tiny 570keV} (Po212.west); \draw[decay] (Tl208.east) -- node [below] { $\beta$ \\ \tiny 570keV} (Pb208.west); \end{tikzpicture}

This diagram shows the decay chain for ${}^{222}$Rn with the decay energy and time of the daughter nuclei. I used this diagram in my thesis. \newcommand{\nucl}[2]{${}^{#2}{\text{#1}}$} \begin{tikzpicture}[ nucleus/.style={scale=.7,thick,draw,rectangle,minimum height=1cm,minimum width=2cm,align=flush center,fill=gray!10,rounded corners}, decay/.style={thick,->,align=flush center,color=blue!80,font=\tiny} ] \node[nucleus] (Ra226) {\nucl{Ra}{224} \\1620 y}; \node[nucleus,below=6mm of Ra226] (Rn222) {\nucl{Rn}{222} \\55.4 s}; \node[nucleus,below=6mm of Rn222] (Po218) {\nucl{Po}{218} \\0.145 ns}; \node[nucleus,below=6mm of Po218] (Pb214) {\nucl{Pb}{214} \\10.6 h}; \node[nucleus,right=12mm of Rn222] (Bi214) {\nucl{Bi}{214} \\ 60.5 m}; \node[nucleus,below=6mm of Bi214] (Po214) {\nucl{Po}{214} \\ 3.05 m}; \node[nucleus,below=6mm of Po214] (Pb210) {\nucl{Pb}{210} \\ 60.5 m}; \node[nucleus,right=36mm of Rn222] (Bi210) {\nucl{Bi}{210} \\ 60.5 m}; \node[nucleus,below=6mm of Bi210] (Po210) {\nucl{Po}{210} \\ 3.05 m}; \node[nucleus,below=6mm of Po210] (Pb216) {\nucl{Pb}{216} \\ 3.05 m}; \draw[decay] (Ra226) -- node [right] { $\alpha$ \\ 5520keV} (Rn222); \draw[decay] (Rn222) -- node [right] { $\alpha$ \\ 5520keV} (Po218); \draw[decay] (Po218) -- node [right] { $\alpha$ \\ 5520keV} (Pb214); \draw[decay] (Bi214) -- node [right] { $\alpha$ \\ 5520keV} (Po214); \draw[decay] (Po214) -- node [right] { $\alpha$ \\ 5520keV} (Pb210); \draw[decay] (Bi210) -- node [right] { $\alpha$ \\ 5520keV} (Po210); \draw[decay] (Po210) -- node [right] { $\alpha$ \\ 5520keV} (Pb216); \draw[decay] (Pb214.east) -- node [sloped, below left] {$\beta$ \\ 570keV} (Bi214.west); \draw[decay] (Pb210.east) -- node [sloped, below left] {$\beta$\\ 570keV} (Bi210.west); \end{tikzpicture}

A Feynman diagram showing sigma decay. I had used this diagram in One of my particle Physics homework. \begin{tikzpicture} \begin{feynman} \vertex (a); \vertex [below left=.4cm and 2cm of a] (b) {$s$}; \vertex [below right=.4cm and 2cm of a] (c){$u$}; \vertex [above=of a] (d); \vertex [below right=.4cm and 2cm of d] (e) {$d$}; \vertex [above right=.4cm and 2cm of d] (f) {$u$}; \vertex [below=0.2cm of b] (s1) {$s$}; \vertex [below=0.2cm of c] (s2) {$s$}; \vertex [below=0.45cm of b] (s3){$d$}; \vertex [below=0.45cm of c] (s4){$d$}; \diagram*{ (b) --[fermion] (a) --[fermion] (c), (a) --[boson,edge label'={\small $W^{-}$}] (d), (d) --[fermion] (e), (d) -- [anti fermion] (f), (s1) -- [fermion] (s2); (s3) -- [fermion] (s4); }; \end{feynman} \end{tikzpicture}