| Hem > Isomeric 13/2$^+$ state in $^{201}$Fr |
| Article | |
| Title | Isomeric 13/2$^+$ state in $^{201}$Fr |
| Author(s) | Auranen, K (Jyvaskyla U.) ; Jakobsson, U (Jyvaskyla U.) ; Badran, H (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) ; Greenlees, P T (Jyvaskyla U.) ; Herzáň, A (Jyvaskyla U. ; Bratislava, Inst. Phys.) ; Julin, R (Jyvaskyla U.) ; Juutinen, S (Jyvaskyla U.) ; Konki, J (Jyvaskyla U. ; CERN) ; Leino, M (Jyvaskyla U.) ; Leppänen, A P (STUK, Helsinki) ; O'Neill, G (Jyvaskyla U. ; Liverpool U.) ; Pakarinen, J (Jyvaskyla U.) ; Papadakis, P (Jyvaskyla U.) ; Partanen, J (Jyvaskyla U.) ; Rahkila, P (Jyvaskyla U.) ; Ruotsalainen, P (Jyvaskyla U.) ; Sandzelius, M (Jyvaskyla U.) ; Sarén, J (Jyvaskyla U.) ; Scholey, C (Jyvaskyla U.) ; Sinclair, L (Jyvaskyla U. ; York U., England) ; Sorri, J (Jyvaskyla U.) ; Stolze, S (Jyvaskyla U.) ; Uusitalo, J (Jyvaskyla U.) ; Voss, A (Jyvaskyla U.) |
| Publication | 2020 |
| Number of pages | 5 |
| In: | Phys. Rev. C 101 (2020) 024306 |
| DOI | 10.1103/PhysRevC.101.024306 |
| Subject category | Nuclear Physics - Experiment |
| Abstract | We have identified an isomeric state in $^{201}$Fr for which we propose a spin and parity of $13/2^+$, and interpret it as arising from the $\pi(i_{13/2})$ configuration. A half-life of 720(40) ns was measured, corresponding to $B(M2)=0.17(2)$ W.u., in good agreement with those of other $13/2^+ \to 9/2^- [\pi (i_{13/2}) \to \pi(h_{9/2})]$ transitions observed in other nuclei in the region. The nuclei of interest were produced in a fusion-evaporation reaction and their decay properties were investigated using the GREAT spectrometer at the focal plane of the RITU gas-filled recoil separator. |
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