\documentclass{article}
\usepackage{geometry}
\geometry{margin=0.75in}
\usepackage{nucleardata}
\usepackage{booktabs}
\usepackage{nopageno}
\begin{document}



\twocolumn[\centering Example and Test File for \texttt{nucleardata} Package]

    Commands applied to $^{~40}$Ca
    
    \begin{tabular}{cc}
\toprule          symbol & \nucsymbol{20} \\
\midrule          Z & \nucz{calcium}\\
\midrule          name & \nucname{20}\\
\midrule          Name & \nucName{20}\\
\midrule		  Spin/parity & \nucspin{20}{41}\\
\midrule          mass excess & \nucexcess{20}{41}\\
\midrule          atomic mass (u) & \nucamassu{20}{41}\\
\midrule          atomic mass (u) & \nucamassu[2]{20}{41}\\
\midrule          atomic mass (keV) & \nucamasskev{20}{41}\\
\midrule          atomic mass (keV) & \nucamasskev[2]{20}{41}\\
\midrule          atomic mass (MeV) & \nucamassmev{20}{41}\\
\midrule          atomic mass (MeV) & \nucamassmev[5]{20}{41}\\
\midrule          nuclear mass (u) & \nuclearmassu{20}{41}\\
\midrule          nuclear mass (keV) & \nuclearmasskev[1]{20}{41}\\
\midrule          nuclear mass (MeV) & \nuclearmassmev{20}{41}\\
\midrule BE/A & \nucbea{20}{41} MeV\\
\midrule          Q$_{\alpha}$ & \nucQalpha{20}{41} MeV\\
\midrule          Q$_{\beta^-}$ & \nucQbeta{20}{41} MeV\\
\midrule          Q$_{\beta^+}$ & \nucQposi{20}{41} MeV\\
\midrule        Q$_{\epsilon}$ & \nucQec{20}{41} MeV\\
\midrule        random A & \nucAran{20} \py{singleAran}\\
\bottomrule
    \end{tabular}
\newpage
Halflife Commands applied to $^{~184}$Au

    \begin{tabular}{cc}
        \toprule
        Unit & Value \\
        \midrule
        ns & \nuchalflife[ns]{Au}{184}\\
        \midrule
        us & \nuchalflife[us]{Au}{184}\\
        \midrule
        ms & \nuchalflife[ms]{Au}{184}\\
        \midrule
        s & \nuchalflife[s]{Au}{184}\\
        \midrule
        min & \nuchalflife[min]{Au}{184}\\
        \midrule
        hr & \nuchalflife[hr]{Au}{184}\\                        
        \midrule
        d & \nuchalflife[d]{Au}{184}\\
        \midrule
        y & \nuchalflife[y]{Au}{184}\\
        \midrule
        My & \nuchalflife[My]{Au}{184}\\
%        ev & \nuchalflife[ev]{Au}{184}\\
%        kev & \nuchalflife[kev]{Au}{184}\\
%        Mev & \nuchalflife[mev]{Au}{184}\\
        \bottomrule\\             
    \end{tabular}
    

Five randomly selected nuclides and their masses and halflives
    \nucrandom{5}
    
%    The  second chosen Z is \py{zran[1]} which is \nucname{zran[1]} with symbol \nucsymbol{zran[1]}. The randomly chosen mass number is \py{aran[1]}, and the atomic mass of $^{~\py{aran[1]}}$\nucsymbol{zran[1]} is \nucamassu{zran[1]}{aran[1]} u.
    
    \begin{tabular}{ccc}
\toprule   nuclide & mass (u) & halflife\\
\midrule  $^{~\py{aran[0]}}$\nucsymbol{zran[0]} & \nucamassu{zran[0]}{aran[0]} &  \nuchalflife{zran[0]}{aran[0]}\\
\midrule  $^{~\py{aran[1]}}$\nucsymbol{zran[1]} & \nucamassu{zran[1]}{aran[1]} & \nuchalflife{zran[1]}{aran[1]}\\
\midrule  $^{~\py{aran[2]}}$\nucsymbol{zran[2]} & \nucamassu{zran[2]}{aran[2]} & \nuchalflife{zran[2]}{aran[2]}\\
\midrule  $^{~\py{aran[3]}}$\nucsymbol{zran[3]} & \nucamassu{zran[3]}{aran[3]} & \nuchalflife{zran[3]}{aran[3]}\\
\midrule  $^{~\py{aran[4]}}$\nucsymbol{zran[4]} & \nucamassu{zran[4]}{aran[4]} & \nuchalflife{zran[4]}{aran[4]}\\
\bottomrule
    \end{tabular}

\end{document}