DELAFOSSE, C.; GOASDUFF, A.; KANKAINEN, A.; VERNEY, D.; AL AYOUBI, L.; BELIUSKINA, O.; CAÑETE, L.; ERONEN, T.; DE GROOTE, R.P.; HUKKANEN, M.; IBRAHIM, F.; ILLANA, A.; JARIES, A.; LALANNE, L.; MOORE, I.D.; NESTERENKO, D.; PENTTILÄ, H.; RINTA-ANTILA, S.; DE ROUBIN, A.; THISSE, D.; THOËR, R.; TOCABENS, G.

doi:10.1140/epja/s10050-022-00698-7

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DELAFOSSE, C.
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie [IJCLab]

GOASDUFF, A.

KANKAINEN, A.

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2022, vol. 58, n° 3, p. 51

Springer

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The $\beta $-delayed $\gamma $ spectroscopy of $^{81}$As has been performed using a purified beam of $^{81}$Ge $(9/2^+)$ ground state at the Ion Guide Isotope Separator On-Line facility (IGISOL). The $^{81}$Ge$^+$ ions were produced using proton-induced fission of $^{232}$Th and selected with the double Penning trap JYFLTRAP for the post-trap decay spectroscopy measurements. The low-spin $(1/2^+)$ isomeric-state ions $^{81m}\hbox {Ge}^+$ were not observed in the fission products. The intrinsic half-life of the $^{81}$Ge ground state has been determined as $T_{1/2}=6.4(2)~\hbox {s}$, which is significantly shorter than the literature value. A new level scheme of $^{81}$As has been built and is compared to shell-model calculations.< Leer menos

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First trap-assisted decay spectroscopy of the $^{81}$Ge ground state

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