Broken seniority symmetry in the semimagic proton mid-shell nucleus ⁹⁵Rh

B Das; B Cederwall; C Qi; M. Brunet; M Górska; R. Canavan; P. H. Regan; Zs. Podolyak; Ö Aktas; H.M Albers; A Banerjee; M.M.R Chishti; J Gerl; N Hubbard; S. Jazrawi; J Jolie; A.K Mistry; F Nowacki; U Ahmed; S Alhomaidhi; M Polettini; C Appleton; A Yaneva; A Algora; T Arici; S Bagchi; G Benzoni; J Benito; A Blazhev; P Boutachkov; A Bracco; A.M Bruce; T Davinson; T Dickel; A Esmaylzadeh; L.M Fraile; E Haettner; O Hall; G Häfner; H Heggen; Ch Hornung; J.P Hucka; P.R John; D Kahl; V Karayonchev; R Kern; R Knöbel; A Korgul; G Kosir; I Kojouharov; D Kostyleva; N Kuzminchuk; N Kurz; R Liotta; R Lozeva; M Mikolajczuk; I Mukha; P Napiralla; R Page; C.M Petrache; N Pietralla; S Pietri; W.R Plaß; Zs Podolyák; J.-M Régis; M Rudigier; H Rösch; P Ruotsalainen; E Sahin; V Sánchez-Tembleque; H Schaffner; C Scheidenberger; F Schirru; L Sexton; B.S. Nara Singh; A Sharma; R Shearman; M Si; Y.K Tanaka; J Vasiljević; J Vesić; J Vilhena; H Weick; H.J Wollersheim; V Werner; J Wiederhold; W Witt; P.J Woods; G Zimba; J Zhao

doi:10.1103/PhysRevResearch.6.L022038

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Broken seniority symmetry in the semimagic proton mid-shell nucleus ⁹⁵Rh

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Broken seniority symmetry in the semimagic proton mid-shell nucleus ⁹⁵Rh

B Das, B Cederwall, C Qi, M. Brunet, M Górska, R. Canavan, P. H. Regan, Zs. Podolyak, Ö Aktas, H.M Albers, …

Physical Review Research, Vol.6(2), L022038

10/05/2024

DOI: https://doi.org/10.1103/PhysRevResearch.6.L022038

Abstract

General Physics

Nuclear Experiment

Physics

Lifetime measurements of low-lying excited states in the semimagic (N=50) nucleus Rh95 have been performed by means of the fast-timing technique. The experiment was carried out using γ-ray detector arrays consisting of LaBr3(Ce) scintillators and germanium detectors integrated into the DESPEC experimental setup commissioned for the Facility for Antiproton and Ion Research (fair) Phase-0, Darmstadt, Germany. The excited states in Rh95 were populated primarily via the β decays of Pd95 nuclei, produced in the projectile fragmentation of a 850 MeV/nucleon Xe124 beam impinging on a 4 g /cm2 Be9 target. The deduced electromagnetic E2 transition strengths for the γ-ray cascade within the multiplet structure depopulating from the isomeric Iπ=21/2+ state are found to exhibit strong deviations from predictions of standard shell model calculations which feature approximately conserved seniority symmetry. In particular, the observation of a strongly suppressed E2 strength for the 13/2+→9/2+ ground state transition cannot be explained by calculations employing standard interactions. This remarkable result may require revision of the nucleon-nucleon interactions employed in state-of-the-art theoretical model calculations, and might also point to the need for including three-body forces in the Hamiltonian.

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Title: Broken seniority symmetry in the semimagic proton mid-shell nucleus ⁹⁵Rh
Creators: B Das
B Cederwall
C Qi
M. Brunet (Author) - University of Surrey, School of Maths and Physics
M Górska - GSI Helmholtz Centre for Heavy Ion Research
R. Canavan (Author) - University of Surrey, School of Maths and Physics
P. H. Regan (Author) - University of Surrey, School of Maths and Physics
Zs. Podolyak (Author) - University of Surrey, School of Maths and Physics
Ö Aktas - KTH Royal Institute of Technology
H.M Albers
A Banerjee - GSI Helmholtz Centre for Heavy Ion Research
M.M.R Chishti
J Gerl
N Hubbard - GSI Helmholtz Centre for Heavy Ion Research
S. Jazrawi (Author) - University of Surrey, School of Maths and Physics
J Jolie - University of Cologne
A.K Mistry - GSI Helmholtz Centre for Heavy Ion Research
F Nowacki - University of Strasbourg
U Ahmed - GSI Helmholtz Centre for Heavy Ion Research
S Alhomaidhi
M Polettini - University of Milan
C Appleton - University of Edinburgh
A Yaneva - University of Cologne
A Algora - Instituto de Física Corpuscular
T Arici - Istanbul University
S Bagchi - Indian Institute of Technology Dhanbad
G Benzoni - INFN Sezione di Milano
J Benito
A Blazhev - University of Cologne
P Boutachkov - GSI Helmholtz Centre for Heavy Ion Research
A Bracco - INFN Sezione di Milano
A.M Bruce
T Davinson - University of Edinburgh
T Dickel - GSI Helmholtz Centre for Heavy Ion Research
A Esmaylzadeh - University of Cologne
L.M Fraile - Universidad Complutense de Madrid
E Haettner - GSI Helmholtz Centre for Heavy Ion Research
O Hall - University of Edinburgh
G Häfner - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
H Heggen - GSI Helmholtz Centre for Heavy Ion Research
Ch Hornung
J.P Hucka
P.R John - TU Darmstadt
D Kahl - University of Edinburgh
V Karayonchev - University of Cologne
R Kern - Technical University of Darmstadt
R Knöbel - GSI Helmholtz Centre for Heavy Ion Research
A Korgul - University of Warsaw
G Kosir - Jožef Stefan Institute
I Kojouharov - GSI Helmholtz Centre for Heavy Ion Research
D Kostyleva - GSI Helmholtz Centre for Heavy Ion Research
N Kuzminchuk - GSI Helmholtz Centre for Heavy Ion Research
N Kurz - GSI Helmholtz Centre for Heavy Ion Research
R Liotta
R Lozeva - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
M Mikolajczuk - University of Warsaw
I Mukha - GSI Helmholtz Centre for Heavy Ion Research
P Napiralla - Technical University of Darmstadt
R Page - University of Liverpool
C.M Petrache - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
N Pietralla - Technical University of Darmstadt
S Pietri - GSI Helmholtz Centre for Heavy Ion Research
W.R Plaß - GSI Helmholtz Centre for Heavy Ion Research
Zs Podolyák - University of Surrey
J.-M Régis
M Rudigier - Technical University of Darmstadt
H Rösch
P Ruotsalainen - University of Jyväskylä
E Sahin - GSI Helmholtz Centre for Heavy Ion Research
V Sánchez-Tembleque
H Schaffner
C Scheidenberger - GSI Helmholtz Centre for Heavy Ion Research
F Schirru
L Sexton
B.S. Nara Singh
A Sharma
R Shearman - National Physical Laboratory
M Si - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
Y.K Tanaka - RIKEN
J Vasiljević - KTH Royal Institute of Technology
J Vesić - Jožef Stefan Institute
J Vilhena - Université de Lyon
H Weick - Saha Institute of Nuclear Physics
H.J Wollersheim - GSI Helmholtz Centre for Heavy Ion Research
V Werner - Technical University of Darmstadt
J Wiederhold
W Witt
P.J Woods - University of Edinburgh
G Zimba - University of Jyväskylä
J Zhao
Publication Details: Physical Review Research, Vol.6(2), L022038
Publisher: American Physical Society
Date published: 10/05/2024
Date accepted: 25/04/2024
Grants: Department for Business, Energy and Industrial Strategy (United Kingdom, London) - BEIS
ST/G000697/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
ST/P005314, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
ST/P003982/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
05P19PKFNA, Federal Ministry of Education and Research (Germany, Bonn) - BMBF
ST/P004598/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
ST/V001027/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
05P21RDFN1, Federal Ministry of Education and Research (Germany, Bonn) - BMBF
05P19RDFN1, Federal Ministry of Education and Research (Germany, Bonn) - BMBF
621-2014-5558, Swedish Research Council (Sweden, Stockholm) - VR
2019-04880, Swedish Research Council (Sweden, Stockholm) - VR
National Measurement and Regulation Office (United Kingdom, London) - NMRO
KJOLIE1820, GSI Helmholtz Centre for Heavy Ion Research (Germany, Darmstadt) - GSI
RTI2018-098868-B-100, Ministerio de Ciencia, Innovación y Universidades (Spain, Madrid) - MICINN
PID2019-104714GB-C21, Ministerio de Ciencia, Innovación y Universidades (Spain, Madrid) - MICINN
I0-0005, Slovenian Research Agency (Slovenia, Ljubljana) - ARRS
ST/T001739/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
ST/P005101/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
Grant note: The results presented here are based on the experiment S480, which was performed at the target station HFS at the GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt (Germany) in the frame of FAIR Phase-0. The authors would like to thank the staff of the GSI accelerator and the technicians of the FRS for their excellent support. This work was supported by the Swedish Research Council under Grants No. 621-2014-5558 and No. 2019-04880. We acknowledge support by the STFC under Grants No. ST/G000697/1, No. ST/P005314, No. ST/P003982/1, No. ST/P004598/1, and No. ST/V001027/1; by the UK Department for Business, Energy and Industrial Strategy via the National Measurement Office; by the BMBF under Grants No. 05P19RDFN1 and No. 05P21RDFN1; by the Helmholtz Research Academy Hesse for FAIR (HFHF); by the GSI F&E Grant No. KJOLIE1820; and by BMBF Grant 05P19PKFNA. G.H., M.S., and R.L. acknowledge IN2P3-GSI Agreements, ADI-IDEX, and CSC-UPS Grants. L.M.F. acknowledges the Spanish MICINN via Project No. RTI2018-098868-B-100. A.A. acknowledges partial support by the Ministerio de Cien cia e Innovacion Grant No. PID2019-104714GB-C21. J.V. acknowledges support by the Slovenian research agency Grant No. I0-0005. B.S.N.S acknowledges the financial support of the UKRI STFC through Grants No. ST/T001739/1 and No. ST/P005101/1.
Identifiers: 99885566602346
Copyright: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by Bibsam
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

Broken seniority symmetry in the semimagic proton mid-shell nucleus ⁹⁵Rh

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