Peter Schury edited section_Plan_for_use_of__.tex  over 8 years ago

Commit id: 634e2884d08d83ed708923c4d80d57fcd4236b29

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As in our original proposal, we plan to utilize a $^{48}$Ca beam for production of Md, No and Lr isotopes near $N$=152. The isotopes we wish to study are shown in yellow in Fig.~\ref{figN152Isotopes}. Even with the efficiency seen thus far, for most of these isotopes we can make meaningful mass measurements within 1 week of machine time. This will be discussed in more detail in the following section.  \subsection{Isotopes to be produced with $^{50}$Ti beams}  Using the recently available $^{50}$Ti beam, with the demonstrated intensity of 500~pnA, we wish to study $^{256, 257}$Rf and $^{257, 258}$Db, shown in green in Fig.~\ref{figN152Isotopes}. The rates are sufficient, even with our present system efficiency, to make meaningful mass measurements of these four isotopes within 1 week of machine time. This will be discussed in more detail in the following section.  \subsection{Isotopes to be produced with $^{54}$Cr beams}  A primary beam of $^{54}$Cr is currently under development at RILAC. While the available intensity is unknown at this point, if an intensity of 500~pnA were to be available we would be able to perform meaningful mass measurements of $^{260, 261}$Sg (shown in blue in Fig.~\ref{figN152Isotopes}) within 1 week of machine time even with the current system efficiency. This will be discussed in more detail in the following section.  \subsection{Isotopes to be produced with $^{14}$N, $^{15}$N, and $^{22}$Ne beams}  Using primary beams of N and Ne with actinide targets, we plan to measure No and Lr isotopes with $N>$153. These isotopes are shown in red and browns in Fig.~\ref{figN152Isotopes}. In order to make meaningful mass measurements in a reasonable time will require an improvement in the efficiency of recapturing ion pulses in the second trap.