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In preliminary work towards No and Lr mass measurements (NP1306-LINAC07) we made precision mass measurements of $^{205,206}$Fr and $^{201}$At and rough mass measurements of $^{201}$Bi, $^{201, 205}$Po, $^{205, 206}$At and $^{205, 206}$Rn \cite{Schury_2015}. These measurements were achieved with only 6 hours of machine time, during which the system efficiency was $\approx$0.05\%. 　As shown in Fig.~\ref{figIsobars}, we have demonstrated an ability to measure multiple isobaric chains simultaneously. This will enable a very efficient survey of the general mass landscape in this region. \section{Experimental goals}  We have three goals for the proposed experiment. Firstly, and overall survey of the mass landscape will contribute to the general knowledge of the field. Secondly, Here  we wish to verify whether or not the isomeric states in the region are as numerous as currently understood. And finally, we hope to measure the production ratios for the various isomeric states as a means to better understand the nuclear structure in the region.  \subsection{Survey of mass landscape}  Particularly for Ac, Th, and Pa isotopes in this region the mass landscape is not well-studied. The region has very few directly measured mass values, and where masses are directly measured they tend to have been done at ESR \cite{Litvinov_2008} and could benefit from a cross-check by propose  an alternate method. As reported in \cite{Schury_2015}, we found deviations from ESR values for $^{201}$As separate  and $^{201}$Po.   \subsection{Verification of isomeric existence}  In the region we desire independent experiment  to studythere are 23 nuclei with isomeric states of $T_{1/2}\gg$1~ms. Among these only six isomeric states have been identified by detection of $\gamma$-rays from internal transition. In 15 cases, the isomeric states have been inferred from detection of multiple $\alpha$-decays energies. In the remaining cases, the isomer is presumed to exist due to largely differeing half-life measurements. Among the inferred isomers, there are six cases where the measured half-lives of ground state and isomeric state are within 2$\sigma$ of eachother. We believe that there is a reasonable possibility that in at least some cases, the isomeric state may be incorrectly inferred from decay to an excited state in the daughter nucleus.  \subsection{Determination of isomeric production ratios}  The large number isomeric states known to exist in  this regionprovide us with a special means to investigate the nuclear structure  in this region. It is generally understood that direct production (e.g. by fragmentation or complete fusion) of nuclei can be na\"{i}vely understood, to zeroth-order, to populate spin states with a probability proportional to $I(I+1)$. Historically, studies of isomeric ratios \cite{Bowry_2013}\cite{de_Jong_1997} have measured the decay of isomeric and ground states to infer the relative populations. While such studies are the only means to address short-lived ($T_{1/2}\ll$1~ms) isomeric states, they require corrections for detector efficiencies, et cetera. By direct mass measurements, we will determine the production ratios without need for such corrections. detail.