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How sharp is the transition into the N=20 island of inversion for the Mg isotopes?

Fernández-Domínguez, B. ; Pietras, B. ; Catford, W. N. ; Orr, N. A. ; Petri, M. ; Chartier, M. ; Paschalis, S. ; Patterson, N. ; Thomas, J. S. ; Caamaño, M. ; Otsuka, T. ; Poves, A. ; Tsunoda, N. ; Achouri, N. L. ; Angélique, J.-C. ; Ashwood, N. I. ; Banu, A. ; Bastin, B. ; Borcea, R. ; Brown, J. ; Delaunay, F. ; Franchoo, S. ; Freer, M. ; Gaudefroy, L. ; Heil, S. ; Labiche, M. ; Laurent, B. ; Lemmon, R. C. ; Macchiavelli, A. O. ; Negoita, F. ; Paul, E. S. ; Rodríguez-Tajes, C. ; Roussel-Chomaz, P. ; Staniou, M. ; Taylor, M. ; Trache, L. ; Wilson, G. L. (2018)
How sharp is the transition into the N=20 island of inversion for the Mg isotopes?
In: Journal of Physics: Conference Series, 966 (1)
doi: 10.1088/1742-6596/966/1/012020
Article, Bibliographie

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Abstract

The N=20 island of inversion is an excellent playground for testing shell model calculations. The Mg chain is a region of shell evolution still far from being well understood. In this paper we present preliminary results of a single-neutron knockout experiment from ³¹Mg performed at GANIL to study the structure of ³¹Mg and of the core ³⁰Mg. The level scheme and longitudinal momentum distributions were mesured and spectroscopic factors were deduced. Negative parity states arise at low energy and the spectroscopic factor for the isomeric 0²₊ in ³⁰Mg was determined to be smaller than foreseen in the standard picture. The preliminary experimental results are compared to state-of the art shell model calculations revealing opposed interpretations.

Item Type: Article
Erschienen: 2018
Creators: Fernández-Domínguez, B. ; Pietras, B. ; Catford, W. N. ; Orr, N. A. ; Petri, M. ; Chartier, M. ; Paschalis, S. ; Patterson, N. ; Thomas, J. S. ; Caamaño, M. ; Otsuka, T. ; Poves, A. ; Tsunoda, N. ; Achouri, N. L. ; Angélique, J.-C. ; Ashwood, N. I. ; Banu, A. ; Bastin, B. ; Borcea, R. ; Brown, J. ; Delaunay, F. ; Franchoo, S. ; Freer, M. ; Gaudefroy, L. ; Heil, S. ; Labiche, M. ; Laurent, B. ; Lemmon, R. C. ; Macchiavelli, A. O. ; Negoita, F. ; Paul, E. S. ; Rodríguez-Tajes, C. ; Roussel-Chomaz, P. ; Staniou, M. ; Taylor, M. ; Trache, L. ; Wilson, G. L.
Type of entry: Bibliographie
Title: How sharp is the transition into the N=20 island of inversion for the Mg isotopes?
Language: English
Date: 2018
Place of Publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 966
Issue Number: 1
Collation: 6 Seiten
DOI: 10.1088/1742-6596/966/1/012020
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Abstract:

The N=20 island of inversion is an excellent playground for testing shell model calculations. The Mg chain is a region of shell evolution still far from being well understood. In this paper we present preliminary results of a single-neutron knockout experiment from ³¹Mg performed at GANIL to study the structure of ³¹Mg and of the core ³⁰Mg. The level scheme and longitudinal momentum distributions were mesured and spectroscopic factors were deduced. Negative parity states arise at low energy and the spectroscopic factor for the isomeric 0²₊ in ³⁰Mg was determined to be smaller than foreseen in the standard picture. The preliminary experimental results are compared to state-of the art shell model calculations revealing opposed interpretations.

Identification Number: Artikel-ID: 012020
Additional Information:

12th International Spring Seminar on Nuclear Physics: Current Problems and Prospects for Nuclear Structure 15–19 May 2017, Sant'Angelo d'Ischia, Italy

Classification DDC: 500 Science and mathematics > 530 Physics
Divisions: 05 Department of Physics
05 Department of Physics > Institute of Nuclear Physics
Date Deposited: 17 May 2024 11:34
Last Modified: 17 May 2024 11:34
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