First trap-assisted decay spectroscopy of the Ge-81 ground state

C. Delafosse; A. Goasduff; A. Kankainen; D. Verney; L. Al Ayoubi; O. Beliuskina; L. Canete; T. Eronen; R. P. de Groote; M. Hukkanen; F. Ibrahim; A. Illana; A. Jaries; L. Lalanne; I. D. Moore; D. Nesterenko; H. Penttila; S. Rinta-Antila; A. de Roubin; D. Thisse; R. Thoer; G. Tocabens

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

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First trap-assisted decay spectroscopy of the Ge-81 ground state

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First trap-assisted decay spectroscopy of the Ge-81 ground state

C. Delafosse, A. Goasduff, A. Kankainen, D. Verney, L. Al Ayoubi, O. Beliuskina, L. Canete, T. Eronen, R. P. de Groote, M. Hukkanen, …

The European physical journal. A, Hadrons and nuclei, Vol.58(3), 51

01/03/2022

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

Abstract

Physical Sciences

Physics

Physics, Nuclear

Physics, Particles & Fields

Science & Technology

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

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Title: First trap-assisted decay spectroscopy of the Ge-81 ground state
Creators: C. Delafosse - University of Paris-Saclay
A. Goasduff - INFN Sezione di Padova
A. Kankainen - University of Jyväskylä
D. Verney - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
L. Al Ayoubi - University of Paris-Saclay
O. Beliuskina - University of Jyväskylä
L. Canete - University of Jyväskylä
T. Eronen - University of Jyväskylä
R. P. de Groote - University of Jyväskylä
M. Hukkanen - University of Jyväskylä
F. Ibrahim - University of Paris-Saclay
A. Illana - University of Jyväskylä
A. Jaries - University of Jyväskylä
L. Lalanne - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
I. D. Moore - University of Jyväskylä
D. Nesterenko - University of Jyväskylä
H. Penttila - University of Jyväskylä
S. Rinta-Antila - University of Jyväskylä
A. de Roubin - University of Jyväskylä
D. Thisse - University of Paris-Saclay
R. Thoer - University of Paris-Saclay
G. Tocabens - University of Paris-Saclay
Publication Details: The European physical journal. A, Hadrons and nuclei, Vol.58(3), 51
Publisher: Springer Nature
Number of pages: 14
Date published: 01/03/2022
Grant note: 844829 / European Union'sHorizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant; Marie Curie Actions 275389; 312544; 295207; 306980 / Academy of Finland; Research Council of Finland 306980 / Academy of Finland (AKA); Research Council of Finland; Finnish Funding Agency for Technology & Innovation (TEKES) 262010 / European Union Seventh Framework Programme through ENSAR ANR-10LABX-0038; ANR-11IDEX-0003-01 / P2IO LabEx 771036 / European Union; European Union (EU)
Identifiers: 99822613102346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

First trap-assisted decay spectroscopy of the Ge-81 ground state

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