Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50

Ali Mollaebrahimi; Christine Hornung; Timo Dickel; Daler Amanbayev; Gabriella Kripko-Koncz; Wolfgang R. Plaß; Samuel Ayet San Andrés; Sönke Beck; Andrey Blazhev; Julian Bergmann; Hans Geissel; Magdalena Górska; Hubert Grawe; Florian Greiner; Emma Haettner; Nasser Kalantar-Nayestanaki; Ivan Miskun; Frédéric Nowacki; Christoph Scheidenberger; Soumya Bagchi; Dimiter L. Balabanski; Ziga Brencic; Olga Charviakova; Paul Constantin; Masoumeh Dehghan; Jens Ebert; Lizzy Gröf; Oscar Hall; Muhsin N. Harakeh; Satbir Kaur; Anu Kankainen; Ronja Knöbel; Daria A. Kostyleva; Natalia Kurkova; Natalia Kuzminchuk; Israel Mardor; Dragos Nichita; Jan Hendrik Otto; Zygmunt Patyk; Stephane Pietri; Sivaji Purushothaman; Moritz Pascal Reiter; Ann Kathrin Rink; Heidi Roesch; Anamaria Spătaru; Goran Stanic; Alexandru State; Yoshiki K. Tanaka; Matjaz Vencelj; Helmut Weick; John S. Winfield; Michael I. Yavor; Jianwei Zhao

doi:10.1016/j.physletb.2023.137833

Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50

Ali Mollaebrahimi^*, Christine Hornung, Timo Dickel, Daler Amanbayev, Gabriella Kripko-Koncz, Wolfgang R. Plaß, Samuel Ayet San Andrés, Sönke Beck, Andrey Blazhev, Julian Bergmann, Hans Geissel, Magdalena Górska, Hubert Grawe, Florian Greiner, Emma Haettner, Nasser Kalantar-Nayestanaki, Ivan Miskun, Frédéric Nowacki, Christoph Scheidenberger, Soumya BagchiDimiter L. Balabanski, Ziga Brencic, Olga Charviakova, Paul Constantin, Masoumeh Dehghan, Jens Ebert, Lizzy Gröf, Oscar Hall, Muhsin N. Harakeh, Satbir Kaur, Anu Kankainen, Ronja Knöbel, Daria A. Kostyleva, Natalia Kurkova, Natalia Kuzminchuk, Israel Mardor, Dragos Nichita, Jan Hendrik Otto, Zygmunt Patyk, Stephane Pietri, Sivaji Purushothaman, Moritz Pascal Reiter, Ann Kathrin Rink, Heidi Roesch, Anamaria Spătaru, Goran Stanic, Alexandru State, Yoshiki K. Tanaka, Matjaz Vencelj, Helmut Weick, John S. Winfield, Michael I. Yavor, Jianwei Zhao

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Direct mass measurements of neutron-deficient nuclides around the N=50 shell closure below ¹⁰⁰Sn were performed at the FRS Ion Catcher (FRS-IC) at GSI, Germany. The nuclei were produced by projectile fragmentation of ¹²⁴Xe, separated in the fragment separator FRS and delivered to the FRS-IC. The masses of 14 ground states and two isomers were measured with relative mass uncertainties down to 1×10⁻⁷ using the multiple-reflection time-of-flight mass spectrometer of the FRS-IC, including the first direct mass measurements of ⁹⁸Cd and ⁹⁷Rh. A new Q_EC=5437±67 keV was obtained for ⁹⁸Cd, resulting in a summed Gamow-Teller (GT) strength for the five observed transitions (0⁺⟶1⁺) as B(GT)=2.94_−0.28^+0.32. Investigation of this result in state-of-the-art shell model approaches accounting for the first time experimentally observed spectrum of GT transitions points to a perfect agreement for N=50 isotones. The excitation energy of the long-lived isomeric state in ⁹⁴Rh was determined for the first time to be 293±21 keV. This, together with the shell model calculations, allows the level ordering in ⁹⁴Rh to be understood.

Original language	English
Article number	137833
Pages (from-to)	1-7
Number of pages	7
Journal	Physics Letters B
Volume	839
Early online date	8 Mar 2023
DOIs	https://doi.org/10.1016/j.physletb.2023.137833
Publication status	Published - 10 Apr 2023

Keywords / Materials (for Non-textual outputs)

Exotic nuclei
Gamow-Teller transition's strength
Multiple-reflection time-of-flight mass spectrometer
N=50 isotones
Nuclear isomers
Nuclear shell structure

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10.1016/j.physletb.2023.137833Licence: Creative Commons: Attribution (CC-BY)

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Mollaebrahimi, A., Hornung, C., Dickel, T., Amanbayev, D., Kripko-Koncz, G., Plaß, W. R., Ayet San Andrés, S., Beck, S., Blazhev, A., Bergmann, J., Geissel, H., Górska, M., Grawe, H., Greiner, F., Haettner, E., Kalantar-Nayestanaki, N., Miskun, I., Nowacki, F., Scheidenberger, C., ... Zhao, J. (2023). Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50. Physics Letters B, 839, 1-7. Article 137833. https://doi.org/10.1016/j.physletb.2023.137833

@article{3c6d05fa0ee745d2972bd808ebe1ba01,

title = "Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50",

abstract = "Direct mass measurements of neutron-deficient nuclides around the N=50 shell closure below 100Sn were performed at the FRS Ion Catcher (FRS-IC) at GSI, Germany. The nuclei were produced by projectile fragmentation of 124Xe, separated in the fragment separator FRS and delivered to the FRS-IC. The masses of 14 ground states and two isomers were measured with relative mass uncertainties down to 1×10−7 using the multiple-reflection time-of-flight mass spectrometer of the FRS-IC, including the first direct mass measurements of 98Cd and 97Rh. A new QEC=5437±67 keV was obtained for 98Cd, resulting in a summed Gamow-Teller (GT) strength for the five observed transitions (0+⟶1+) as B(GT)=2.94−0.28+0.32. Investigation of this result in state-of-the-art shell model approaches accounting for the first time experimentally observed spectrum of GT transitions points to a perfect agreement for N=50 isotones. The excitation energy of the long-lived isomeric state in 94Rh was determined for the first time to be 293±21 keV. This, together with the shell model calculations, allows the level ordering in 94Rh to be understood.",

keywords = "Exotic nuclei, Gamow-Teller transition's strength, Multiple-reflection time-of-flight mass spectrometer, N=50 isotones, Nuclear isomers, Nuclear shell structure",

author = "Ali Mollaebrahimi and Christine Hornung and Timo Dickel and Daler Amanbayev and Gabriella Kripko-Koncz and Pla{\ss}, {Wolfgang R.} and {Ayet San Andr{\'e}s}, Samuel and S{\"o}nke Beck and Andrey Blazhev and Julian Bergmann and Hans Geissel and Magdalena G{\'o}rska and Hubert Grawe and Florian Greiner and Emma Haettner and Nasser Kalantar-Nayestanaki and Ivan Miskun and Fr{\'e}d{\'e}ric Nowacki and Christoph Scheidenberger and Soumya Bagchi and Balabanski, {Dimiter L.} and Ziga Brencic and Olga Charviakova and Paul Constantin and Masoumeh Dehghan and Jens Ebert and Lizzy Gr{\"o}f and Oscar Hall and Harakeh, {Muhsin N.} and Satbir Kaur and Anu Kankainen and Ronja Kn{\"o}bel and Kostyleva, {Daria A.} and Natalia Kurkova and Natalia Kuzminchuk and Israel Mardor and Dragos Nichita and Otto, {Jan Hendrik} and Zygmunt Patyk and Stephane Pietri and Sivaji Purushothaman and Reiter, {Moritz Pascal} and Rink, {Ann Kathrin} and Heidi Roesch and Anamaria Sp{\u a}taru and Goran Stanic and Alexandru State and Tanaka, {Yoshiki K.} and Matjaz Vencelj and Helmut Weick and Winfield, {John S.} and Yavor, {Michael I.} and Jianwei Zhao",

note = "Funding Information: The authors acknowledge a long-standing collaboration with Hubert Grawe and John S. Winfield and deeply regret their passing. The results presented here are based on the experiment S474, which was performed at the FRS at the GSI Helmholtzzentrum f{\"u}r Schwerionenforschung, Darmstadt (Germany) in the context of FAIR Phase-0. The results presented in this paper are based on work performed before February 24th 2022. This work was supported by the German Federal Ministry for Education and Research (BMBF) under contracts no. 05P19RGFN1 and 05P21RGFN1, by the German Research Foundation (DFG) under contract no. SCHE 1969/2-1, by the Hessian Ministry for Science and Art (HMWK) through the LOEWE Center HIC for FAIR, by HGS-HIRe, and by Justus-Liebig-Universit{\"a}t Gie{\ss}en and GSI under the JLU-GSI strategic Helmholtz partnership agreement. The paper was partly financed by the international project “PMW” of the Polish Minister of Science and Higher Education; active in the period 2022-2024; grant Nr 5237/GSI-FAIR/2022/0. SCOAP3. ",

year = "2023",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2023.137833",

language = "English",

volume = "839",

pages = "1--7",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

}

Mollaebrahimi, A, Hornung, C, Dickel, T, Amanbayev, D, Kripko-Koncz, G, Plaß, WR, Ayet San Andrés, S, Beck, S, Blazhev, A, Bergmann, J, Geissel, H, Górska, M, Grawe, H, Greiner, F, Haettner, E, Kalantar-Nayestanaki, N, Miskun, I, Nowacki, F, Scheidenberger, C, Bagchi, S, Balabanski, DL, Brencic, Z, Charviakova, O, Constantin, P, Dehghan, M, Ebert, J, Gröf, L, Hall, O, Harakeh, MN, Kaur, S, Kankainen, A, Knöbel, R, Kostyleva, DA, Kurkova, N, Kuzminchuk, N, Mardor, I, Nichita, D, Otto, JH, Patyk, Z, Pietri, S, Purushothaman, S, Reiter, MP, Rink, AK, Roesch, H, Spătaru, A, Stanic, G, State, A, Tanaka, YK, Vencelj, M, Weick, H, Winfield, JS, Yavor, MI & Zhao, J 2023, 'Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50', Physics Letters B, vol. 839, 137833, pp. 1-7. https://doi.org/10.1016/j.physletb.2023.137833

TY - JOUR

T1 - Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50

AU - Mollaebrahimi, Ali

AU - Hornung, Christine

AU - Dickel, Timo

AU - Amanbayev, Daler

AU - Kripko-Koncz, Gabriella

AU - Plaß, Wolfgang R.

AU - Ayet San Andrés, Samuel

AU - Beck, Sönke

AU - Blazhev, Andrey

AU - Bergmann, Julian

AU - Geissel, Hans

AU - Górska, Magdalena

AU - Grawe, Hubert

AU - Greiner, Florian

AU - Haettner, Emma

AU - Kalantar-Nayestanaki, Nasser

AU - Miskun, Ivan

AU - Nowacki, Frédéric

AU - Scheidenberger, Christoph

AU - Bagchi, Soumya

AU - Balabanski, Dimiter L.

AU - Brencic, Ziga

AU - Charviakova, Olga

AU - Constantin, Paul

AU - Dehghan, Masoumeh

AU - Ebert, Jens

AU - Gröf, Lizzy

AU - Hall, Oscar

AU - Harakeh, Muhsin N.

AU - Kaur, Satbir

AU - Kankainen, Anu

AU - Knöbel, Ronja

AU - Kostyleva, Daria A.

AU - Kurkova, Natalia

AU - Kuzminchuk, Natalia

AU - Mardor, Israel

AU - Nichita, Dragos

AU - Otto, Jan Hendrik

AU - Patyk, Zygmunt

AU - Pietri, Stephane

AU - Purushothaman, Sivaji

AU - Reiter, Moritz Pascal

AU - Rink, Ann Kathrin

AU - Roesch, Heidi

AU - Spătaru, Anamaria

AU - Stanic, Goran

AU - State, Alexandru

AU - Tanaka, Yoshiki K.

AU - Vencelj, Matjaz

AU - Weick, Helmut

AU - Winfield, John S.

AU - Yavor, Michael I.

AU - Zhao, Jianwei

N1 - Funding Information: The authors acknowledge a long-standing collaboration with Hubert Grawe and John S. Winfield and deeply regret their passing. The results presented here are based on the experiment S474, which was performed at the FRS at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany) in the context of FAIR Phase-0. The results presented in this paper are based on work performed before February 24th 2022. This work was supported by the German Federal Ministry for Education and Research (BMBF) under contracts no. 05P19RGFN1 and 05P21RGFN1, by the German Research Foundation (DFG) under contract no. SCHE 1969/2-1, by the Hessian Ministry for Science and Art (HMWK) through the LOEWE Center HIC for FAIR, by HGS-HIRe, and by Justus-Liebig-Universität Gießen and GSI under the JLU-GSI strategic Helmholtz partnership agreement. The paper was partly financed by the international project “PMW” of the Polish Minister of Science and Higher Education; active in the period 2022-2024; grant Nr 5237/GSI-FAIR/2022/0. SCOAP3.

PY - 2023/4/10

Y1 - 2023/4/10

N2 - Direct mass measurements of neutron-deficient nuclides around the N=50 shell closure below 100Sn were performed at the FRS Ion Catcher (FRS-IC) at GSI, Germany. The nuclei were produced by projectile fragmentation of 124Xe, separated in the fragment separator FRS and delivered to the FRS-IC. The masses of 14 ground states and two isomers were measured with relative mass uncertainties down to 1×10−7 using the multiple-reflection time-of-flight mass spectrometer of the FRS-IC, including the first direct mass measurements of 98Cd and 97Rh. A new QEC=5437±67 keV was obtained for 98Cd, resulting in a summed Gamow-Teller (GT) strength for the five observed transitions (0+⟶1+) as B(GT)=2.94−0.28+0.32. Investigation of this result in state-of-the-art shell model approaches accounting for the first time experimentally observed spectrum of GT transitions points to a perfect agreement for N=50 isotones. The excitation energy of the long-lived isomeric state in 94Rh was determined for the first time to be 293±21 keV. This, together with the shell model calculations, allows the level ordering in 94Rh to be understood.

AB - Direct mass measurements of neutron-deficient nuclides around the N=50 shell closure below 100Sn were performed at the FRS Ion Catcher (FRS-IC) at GSI, Germany. The nuclei were produced by projectile fragmentation of 124Xe, separated in the fragment separator FRS and delivered to the FRS-IC. The masses of 14 ground states and two isomers were measured with relative mass uncertainties down to 1×10−7 using the multiple-reflection time-of-flight mass spectrometer of the FRS-IC, including the first direct mass measurements of 98Cd and 97Rh. A new QEC=5437±67 keV was obtained for 98Cd, resulting in a summed Gamow-Teller (GT) strength for the five observed transitions (0+⟶1+) as B(GT)=2.94−0.28+0.32. Investigation of this result in state-of-the-art shell model approaches accounting for the first time experimentally observed spectrum of GT transitions points to a perfect agreement for N=50 isotones. The excitation energy of the long-lived isomeric state in 94Rh was determined for the first time to be 293±21 keV. This, together with the shell model calculations, allows the level ordering in 94Rh to be understood.

KW - Exotic nuclei

KW - Gamow-Teller transition's strength

KW - Multiple-reflection time-of-flight mass spectrometer

KW - N=50 isotones

KW - Nuclear isomers

KW - Nuclear shell structure

UR - http://www.scopus.com/inward/record.url?scp=85150847522&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2023.137833

DO - 10.1016/j.physletb.2023.137833

M3 - Article

AN - SCOPUS:85150847522

SN - 0370-2693

VL - 839

SP - 1

EP - 7

JO - Physics Letters B

JF - Physics Letters B

M1 - 137833

ER -

Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50

Abstract

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Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Cite this

Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50

Abstract

Keywords / Materials (for Non-textual outputs)

Access to Document

Other files and links

Fingerprint

Projects

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Edinburgh Nuclear Physics Group Consolidated Grant Proposal

Cite this

Studying Gamow-Teller transitions and the assignment of isomeric and ground states at N = 50