Peter Schury edited section_Plan_for_use_of__.tex  over 8 years ago

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\end{table}  \subsection{Isotopes to be produced with $^{15}$N beams (7 days)}  Using a primary beam of $^{15}$N, we can measure Lr isotopes with $N>$153. These isotopes are shown in brown in Fig.~\ref{figN152Isotopes}. In such asymmetric reactions, the efficiency of GARIS-II is only $\approx$20\%. Nonetheless, we can make meaningful mass measurements of $^{257-260}$Lr in a reasonable time even with our present efficiency. The anticipated yields and achievable mass precisions are shown in Table~\ref{tblNBeams}. These four isotopes should be able to be measured simultaneously.  \begin{table}   \begin{tabular}{ c c c c c c }  Reaction & $E_\mathrm{proj}$ [MeV] & $\sigma$ [nb] & reference & Rate [day$^{-1}$] & $\delta m/m$ [48 [144  hrs] \\ $^{248}$U($^{15}$N,3n)$^{256}$No $^{248}$Cm($^{15}$N,3n)$^{260}$No  & 105 78  & 10 2  & & 12 0.5  & 1.3$\times 4$\times  10^{-6}$ \\ $^{248}$U($^{15}$N,4n)$^{257}$No $^{248}$Cm($^{15}$N,4n)$^{259}$No  & 103 80  & 1.9 20  & & 2 5  & 3$\times 1.3$\times  10^{-6}$ \\ $^{248}$U($^{15}$N,5n)$^{257}$No $^{248}$Cm($^{15}$N,5n)$^{258}$No  & 103 85  & 1.9 200  & & 2 45  & 3$\times 10^{-6}$ 4$\times 10^{-7}$  \\ $^{248}$U($^{15}$N,5n)$^{257}$No $^{248}$Cm($^{15}$N,6n)$^{257}$No  & 103 85  & 1.9 20  & & 2 5  & 3$\times 1.3$\times  10^{-6}$ \\ \end{tabular}   \caption{Reactions with 3~p$\mu$A $^{22}$Ne 1~p$\mu$A $^{15}$N  beam. The rate refers to the rate at the MRTOF assuming current efficiency.} \label{tblNBeam}  \end{table}