A1 Journal article (refereed)
First trap-assisted decay spectroscopy of the 81Ge ground state (2022)

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., . . . Tocabens, G. (2022). First trap-assisted decay spectroscopy of the 81Ge ground state. European Physical Journal A, 58(3), Article 51. https://doi.org/10.1140/epja/s10050-022-00698-7

JYU authors or editors

Publication details

All authors or editorsDelafosse, C.; Goasduff, A.; Kankainen, A.; Verney, D.; Al Ayoubi, L.; Beliuskina, O.; Cañete, L.; Eronen, T.; de Groote, R. P.; Hukkanen, M.; et al.

Journal or seriesEuropean Physical Journal A



Publication year2022

Publication date21/03/2022


Issue number3

Article number51


Publication countryGermany

Publication languageEnglish


Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/81810


The β-delayed γ spectroscopy of 81As has been performed using a purified beam of 81Ge (9/2+) ground state at the Ion Guide Isotope Separator On-Line facility (IGISOL). The 81Ge+ ions were produced using proton-induced fission of 232Th and selected with the double Penning trap JYFLTRAP for the post-trap decay spectroscopy measurements. The low-spin (1/2+) isomeric-state ions 81mGe+ were not observed in the fission products. The intrinsic half-life of the 81Ge ground state has been determined as T1/2=6.4(2) s, which is significantly shorter than the literature value. A new level scheme of 81As has been built and is compared to shell-model calculations.

Keywordsnuclear physicsgermaniumspectroscopy

Free keywordsspectroscopy

Contributing organizations

Related projects

Ministry reportingYes

Reporting Year2022

JUFO rating1

Last updated on 2024-14-06 at 23:46