The shape of the T z = +1 Nucleus 94 Pd and the role of Proton-Neutron Interactions on the Structure of its Excited States

A Yaneva; Shaheen Jazrawi; M Mikołajczuk; M. Gorska; Regan Patrick; B Das; H.M Albers; S Alhomaidhi; T Arici; A Banerjee; G Benzoni; B Cederwall; M. M. R. Chishti; D. D. Dao; T. Davinson; A Gargano; J. Gerl; O. Hall; J. Jolie; N. Hubbard; I. Kojouharov; A. K. Mistry; F Nowacki; M. Polettini; M. Rudigier; E. Sahin; H. Schaffner; A. Sharma; M Armstrong; H. J. Wollersheim; P. Boutachkov; T Dickel; E Haettner; H Heggen; Ch Hornung; R Knobel; D Kostyleva; N Kurz; N Kuzminchuk; Ivan Mukha; S Pietri; W.R Plaß; Zsolt Podolyak; C Scheidenberger; Y.K Tanaka; J Vesic; H Weick; U Ahmed; Özge Aktas; A. Algora; C Appleton; J. Benito Garcıa; A Blazhev; A Bracco; A. M. Bruce; MATTHEW HENRY BRUNET; RHIANN CANAVAN; A. Esmaylzadeh; L. M. Fraile; G. Hafner; K.P Hucka; P R John; D Kahl; Karayonchev; R Kern; Gregor Kosir; R. Lozeva; P. Napiralla; B. S. Nara Singh; R. Page; C. M. Petrache; N Pietralla; J. -M Regis; H Rösch; P Ruotsalainen; V. Sánchez-Tembleque; L. Sexton; R Shearman; M. Si; V. Werner; J. Wiederhold; K. Wimmer; W. Witt; P. Woods; G Zimba

doi:10.1016/j.physletb.2024.138805

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The shape of the T z = +1 Nucleus 94 Pd and the role of Proton-Neutron Interactions on the Structure of its Excited States

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The shape of the T z = +1 Nucleus 94 Pd and the role of Proton-Neutron Interactions on the Structure of its Excited States

A Yaneva, Shaheen Jazrawi, M Mikołajczuk, M. Gorska, Regan Patrick, B Das, H.M Albers, S Alhomaidhi, T Arici, A Banerjee, …

Physics Letters B, Vol.855(August 2024), 138805

08/2024

DOI: https://doi.org/10.1016/j.physletb.2024.138805

Abstract

γ spectroscopy

fast-timing γ-ray coincidences

pn interacion

Isovector vs isoscalar pairing

Shell Model

Reduced transition probabilities have been extracted between excited, yrast states in the N = Z + 2 nucleus 94 Pd. The transitions of interest were observed following decays of the I π = 14 + , E x = 2129-keV isomeric state, which was populated following the projectile fragmentation of a 124 Xe primary beam at the GSI Helmholtzzentrum für Schwerionenforschung accelerator facility as part of FAIR Phase-0. Experimental information regarding the reduced E2 transition strengths for the decays of the yrast 8 + and 6 + states was determined following isomer-delayed E γ1 − E γ2 − △T 2,1 coincidence method, using the LaBr 3 (Ce)-based FATIMA fast-timing coincidence gamma-ray array, which allowed direct determination of lifetimes of states in 94 Pd using the Generalized Centroid Difference (GCD) method. The experimental value for the half-life of the yrast 8 + state of 755(106) ps results in a reduced transition probability of B(E2:8 + →6 +) = 205 +34 −25 e 2 fm 4 , which enables a precise verification of shell-model calculations for this unique system, lying directly between the N = Z line and the N = 50 neutron shell closure. The determined B(E2) value provides an insight into the purity of (g 9/2) n configurations in competition with admixtures from excitations between the (lower) N = 3p f and (higher) N = 4gds orbitals for the first time. The results indicate weak collectivity expected for near-zero quadrupole deformation and an increasing importance of the T = 0 proton-neutron interaction at N = 48.

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Title: The shape of the T z = +1 Nucleus 94 Pd and the role of Proton-Neutron Interactions on the Structure of its Excited States
Creators: A Yaneva - University of Cologne
Shaheen Jazrawi - National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK
M Mikołajczuk - GSI Helmholtz Centre for Heavy Ion Research
M. Gorska - GSI Helmholtz Centre for Heavy Ion Research
Regan Patrick (Author) - University of Surrey, School of Maths and Physics
B Das - TU Darmstadt
H.M Albers - GSI Helmholtz Centre for Heavy Ion Research
S Alhomaidhi - GSI Helmholtz Centre for Heavy Ion Research
T Arici - GSI Helmholtz Centre for Heavy Ion Research
A Banerjee - GSI Helmholtz Centre for Heavy Ion Research
G Benzoni - Istituto Nazionale di Fisica Nucleare, Sezione di Milano
B Cederwall - KTH Royal Institute of Technology
M. M. R. Chishti - University of Surrey, School of Maths and Physics
D. D. Dao - Université de Strasbourg
T. Davinson - University of Edinburgh
A Gargano - Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
J. Gerl - GSI Helmholtz Centre for Heavy Ion Research
O. Hall - University of Edinburgh
J. Jolie - University of Cologne
N. Hubbard - GSI Helmholtz Centre for Heavy Ion Research
I. Kojouharov - GSI Helmholtz Centre for Heavy Ion Research
A. K. Mistry - Technical University of Darmstadt
F Nowacki - Institut Pluridisciplinaire Hubert Curien
M. Polettini - Istituto Nazionale di Fisica Nucleare, Sezione di Milano
M. Rudigier - Technical University of Darmstadt
E. Sahin - GSI Helmholtz Centre for Heavy Ion Research
H. Schaffner - GSI Helmholtz Centre for Heavy Ion Research
A. Sharma - Indian Institute of Technology Ropar
M Armstrong - University of Cologne
H. J. Wollersheim - GSI Helmholtz Centre for Heavy Ion Research
P. Boutachkov - GSI Helmholtz Centre for Heavy Ion Research
T Dickel - GSI Helmholtz Centre for Heavy Ion Research
E Haettner - GSI Helmholtz Centre for Heavy Ion Research
H Heggen - GSI Helmholtz Centre for Heavy Ion Research
Ch Hornung - GSI Helmholtz Centre for Heavy Ion Research
R Knobel - GSI Helmholtz Centre for Heavy Ion Research
D Kostyleva - GSI Helmholtz Centre for Heavy Ion Research
N Kurz - GSI Helmholtz Centre for Heavy Ion Research
N Kuzminchuk - GSI Helmholtz Centre for Heavy Ion Research
Ivan Mukha - GSI Helmholtz Centre for Heavy Ion Research
S Pietri - GSI Helmholtz Centre for Heavy Ion Research
W.R Plaß - GSI Helmholtz Centre for Heavy Ion Research
Zsolt Podolyak (Author) - University of Surrey, School of Maths and Physics
C Scheidenberger - GSI Helmholtz Centre for Heavy Ion Research
Y.K Tanaka - RIKEN
J Vesic - University of Ljubljana
H Weick - GSI Helmholtz Centre for Heavy Ion Research
U Ahmed - Technical University of Darmstadt
Özge Aktas - KTH Royal Institute of Technology
A. Algora - HUN-REN Institute for Nuclear Research
C Appleton - University of Cologne
J. Benito Garcıa - Universidad Complutense de Madrid
A Blazhev - University of Cologne
A Bracco - Istituto Nazionale di Fisica Nucleare, Sezione di Milano
A. M. Bruce - University of Brighton
MATTHEW HENRY BRUNET - University of Surrey, School of Maths and Physics
RHIANN CANAVAN - University of Surrey, School of Maths and Physics
A. Esmaylzadeh - University of Cologne
L. M. Fraile - Universidad Complutense de Madrid
G. Hafner - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
K.P Hucka - King Abdulaziz City for Science and Technology
P R John - Technical University of Darmstadt
D Kahl - University of Edinburgh
Karayonchev - University of Cologne
R Kern - University of Cologne
Gregor Kosir - Jožef Stefan Institute
R. Lozeva - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
P. Napiralla - King Abdulaziz City for Science and Technology
B. S. Nara Singh - University of the West of Scotland
R. Page - University of Liverpool
C. M. Petrache - Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
N Pietralla - Technical University of Darmstadt
J. -M Regis - University of Cologne
H Rösch - Technical University of Darmstadt
P Ruotsalainen - University of Jyväskylä
V. Sánchez-Tembleque - Universidad Complutense de Madrid
L. Sexton - University of Edinburgh
R Shearman - National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK
M. Si - IJCLab, Université Paris-Saclay, CNRS/IN2P3, 91405 Orsay Cedex, France
V. Werner - Technical University of Darmstadt
J. Wiederhold - Technical University of Darmstadt
K. Wimmer - GSI Helmholtz Centre for Heavy Ion Research
W. Witt - Technical University of Darmstadt
P. Woods - University of Edinburgh
G Zimba - University of Jyväskylä
Publication Details: Physics Letters B, Vol.855(August 2024), 138805
First online publication date: 19/06/2024
Publication Date: 08/2024
Date accepted for publication: 12/06/2024
Grants: ST/P005314/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
Identifiers: 99893766402346; WOS:001281910600001
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article
Data Access Statement: Data will be made available on request.

The shape of the T z = +1 Nucleus 94 Pd and the role of Proton-Neutron Interactions on the Structure of its Excited States

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