Journal Article

GSI-2022-00929

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Mapping the N = 40 island of inversion: Precision mass measurements of neutron-rich Fe isotopes

Porter, W. S. (Corresponding author) ; Ashrafkhani, B. ; Bergmann, J. ; Brown, C. ; Brunner, T. ; Cardona, J. D. ; Curien, D. ; Dedes, I. ; Dickel, T.GSI* ; Dudek, J. ; Dunling, E. ; Gwinner, G. ; Hockenbery, Z. ; Holt, J. D. ; Hornung, C.GSI* ; Izzo, C. ; Jacobs, A. ; Javaji, A. ; Kootte, B. ; Kripkó-Koncz, G. ; Lykiardopoulou, E. M. ; Miyagi, T. ; Mukul, I. ; Murböck, T. ; Plaß, W. R.GSI* ; Reiter, M. P. ; Ringuette, J. ; Scheidenberger, C.GSI* ; Silwal, R. ; Walls, C. ; Wang, H. L. ; Wang, Y. ; Yang, J. ; Dilling, J. ; Kwiatkowski, A. A.

2022
Inst. Woodbury, NY

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Please use a persistent id in citations: doi:10.1103/PhysRevC.105.L041301

Report No.: arXiv:2203.10141

Abstract: Nuclear properties across the chart of nuclides are key to improving and validating our understanding of the strong interaction in nuclear physics. We present high-precision mass measurements of neutron-rich Fe isotopes performed at the TITAN facility. The multiple-reflection time-of-flight mass spectrometer (MR-ToF-MS), achieving a resolving power greater than $600\,000$ for the first time, enabled the measurement of $^{63-70}$Fe, including first-time high-precision direct measurements ($\delta m/m \sim 10^{-7}$) of $^{68-70}$Fe, as well as the discovery of a long-lived isomeric state in $^{69}$Fe. These measurements are accompanied by both mean-field and ab initio calculations using the most recent realizations which enable theoretical assignment of the spin-parities of the $^{69}$Fe ground and isomeric states. Together with mean-field calculations of quadrupole deformation parameters for the Fe isotope chain, these results benchmark a maximum of deformation in the $N = 40$ island of inversion in Fe, and shed light on trends in level densities indicated in the newly-refined mass surface.

Note: ISSN 2469-9993 not unique: **2 hits**.Natural Sciences and Engineering Research Council (NSERC) of Canada [SAPIN2018-00027, RGPAS-2018-522453]; National Research Council (NRC) of Canada; Polish National Science Centre [2016/21/B/ST2/01227]; Polish-French COPIN-IN2P3 collaboration agreement [04-113, 05-119]; UKRI Science and Technology Facilities Council (STFC) [ST/P004008/1]; U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-FG02-93ER40789]; German Research Foundation (DFG) [SCHE 1969/2-1]; German Federal Ministry for Education and Research (BMBF) [05P19RGFN1, 05P21RGFN1]; Hessian Ministry for Science and Art through the LOEWE Center HICforFAIR; National Natural Science Foundation of China [11975209]; Physics Research and Development Program of Zhengzhou University [32410017]; COPIGAL 2020; JLU; GSI

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Contributing Institute(s):

1. FRS / SFRS Experimente (FRS)
2. Helmholtz ForschAkad Hess. f. FAIR, HFHF (FHF)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. SUC-GSI-Giessen - Strategic university cooperation GSI-U Gießen (SUC-GSI-GI) (SUC-GSI-GI)
3. Nuclear structure physics and nuclear astrophysics - Experiment (HFHF project) (I:(DE-Ds200)HFHF-NuAstro-Exp) (I:(DE-Ds200)HFHF-NuAstro-Exp)

Experiment(s):

1. External experiment at external facility/ no experiment at GSI (other)

Appears in the scientific report 2022

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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