2021 Impact factor 3.131
Hadrons and Nuclei
Eur. Phys. J. A 6, 235-237

Short note

Level sructure in 206At

X.C. Feng1 - Y.X. Guo1 - X.H. Zhou1 - X.F. Sun1 - X.G. Lei1 - W.X. Huang1 - J.J. He1 - Z. Liu1 - Y.H. Zhang1 - S.F. Zhu1 - Y.X. Luo1 - S.X. Wen2 - G.J. Yuan2 - X.G. Wu2

1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, P.R. China
2 China Insitute of Atomic Energy, Beijing 102413, P.R. China

Receieved: 13 September 1999 Communicated by B. Povh

The high-spin states of 206At have been studied in the reaction 197 Au (12C, 3n) 206At at 12C energies from 60 to 80 MeV. In-beam measurements of $\gamma $-ray excitation functions, $\gamma $-$\gamma $-t coincidences, and $\gamma $-ray angular distributions were carried out with seven BGO(AC)HPGe detectors and one intrinsic Ge planar detector. A level scheme for 206At with 25 $\gamma $ rays was established for the first time, including a 10- isomer with a measured half-life of 410$\pm $ 80 ns. The level scheme of 206At consists of two disconnected cascades, probably corresponding to the proton excitations and the neutron-hole excitations, respectively.

23.20.Lv Gamma transition and level energies - 27.80.+w $190 \leq A \leq 219$

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