https://doi.org/10.1140/epja/s10050-022-00698-7
Regular Article - Experimental Physics
First trap-assisted decay spectroscopy of the 
Ge ground state
1
Department of Physics, University of Jyväskylä, PO Box 35, 40014, Jyväskylä, Finland
2
Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405, Orsay, France
3
Departimento di Fisica e Astronomia, Università di Padova, and INFN, Sezione di Padova, 35131, Padua, Italy
4
LP2iB, UMR 5797 CNRS/IN2P3, Université Bordeaux 1, 33175, Gradignan, France
5
Grand Accélérateur National d’Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, Caen, France
a
clement.delafosse@ijclab.in2p3.fr
Received:
20
December
2021
Accepted:
24
February
2022
Published online:
21
March
2022
The 
-delayed 
spectroscopy of As has been performed using a purified beam of Ge 
ground state at the Ion Guide Isotope Separator On-Line facility (IGISOL). The Ge
ions were produced using proton-induced fission of 
Th and selected with the double Penning trap JYFLTRAP for the post-trap decay spectroscopy measurements. The low-spin 
isomeric-state ions 
were not observed in the fission products. The intrinsic half-life of the Ge ground state has been determined as 
, which is significantly shorter than the literature value. A new level scheme of As has been built and is compared to shell-model calculations.
© The Author(s) 2022
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