Abstract

A first performance test of the Coulomb excitation multipolarimetry (Coulex-multipolarimetry) method is presented. It is based on a \$\$^\85\\backslashhbox \Br\\backslash,\backslashpi p\_\3/2\\backslashrightarrow \backslashpi p\_\1/2\\$\$85Br$\pi$p3/2→$\pi$p1/2 spin-flip experiment performed as part of the PreSPEC-AGATA campaign at the GSI Helmholtzzentrum für Schwerionenforschung (GSI). Via determination of background levels around the expected \$\$^\85\\backslashhbox \Br\\$\$85Br excitations as well as measured \$\$^\197\\backslashhbox \Au\\$\$197Au excitations, an upper limit for the M1 transition strength of the \$\$1/2\_1^-\backslashrightarrow 3/2\_\backslashtext \g.s.\^-\$\$1/21-→3/2g.s.- transition in \$\$^\85\\backslashhbox \Br\\$\$85Br and a lower beam time limit for upcoming experimental campaigns utilizing Coulex-multipolarimetry have been inferred. The impact of the use of AGATA in its anticipated \$\$1\backslashpi \$\$1$\pi$ configuration on these estimates is deduced via Geant4 simulations.

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