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 editors: Delafosse, 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 series: European Physical Journal A

ISSN: 1434-6001

eISSN: 1434-601X

Publication year: 2022

Publication date: 21/03/2022

Volume: 58

Issue number: 3

Article number: 51

Publisher: Springer

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1140/epja/s10050-022-00698-7

Publication open access: Openly available

Publication channel open access: Partially open access channel

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

Abstract

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.

Keywords: nuclear physics; germanium; spectroscopy

Free keywords: spectroscopy

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Ministry reporting: Yes

Reporting Year: 2022

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