Bulletin of the American Physical Society
Fall 2022 Meeting of the APS Division of Nuclear Physics
Volume 67, Number 17
Thursday–Sunday, October 27–30, 2022; Time Zone: Central Daylight Time, USA; New Orleans, Louisiana
Session KG: Nuclear Structure V
10:30 AM–12:18 PM,
Saturday, October 29, 2022
Hyatt Regency Hotel
Room: Celestin G
Chair: Heather Crawford, Lawrence Berkeley National Laboratory
Abstract: KG.00004 : Nuclear moments of indium isotopes reveal abrupt change at magic number 82*
11:06 AM–11:18 AM
Presenter:
Adam R Vernon
(Massachusetts Institute of Technology MI)
Authors:
Adam R Vernon
(Massachusetts Institute of Technology MI)
Ronald Fernando F Garcia Ruiz
(MASSACHUSETTS INSTITUTE OF TECHNOLOGY)
Gerda Neyens
(KU Leuven)
Takayuki Miyagi
(TRIUMF)
Cory Binnersley
(The University of Manchester)
Jonathan Billowes
(The University of Manchester)
Kieran Flanagan
(The University of Manchester)
Mark L Bissell
(The University of Manchester)
Jeremy Bonnard
(University of York)
Thomas E Cocolios
(KU Leuven)
Jacek Dobaczewski
(University of York)
Georgi Georgiev
(Assumption College)
Wouter Gins
(KU Leuven)
David Leimbach
(CERN)
Ruben de Groote
(KU Leuven)
Reinhart Hinke
(CERN)
Jason D Holt
(TRIUMF)
Agota Koszorús
(KU Leuven)
Kara Lynch
(CERN)
Ragnar Stroberg
(University of Washington)
Shane G Wilkins
(The University of Manchester)
Xiaofei Yang
(Peking Univ)
Deyan Yordanov
(Universite Paris-Saclay)
Collaboration:
CRIS collaboration at CERN-ISOLDE
We show that the electromagnetic properties of the neutron-rich indium isotopes significantly differ at N = 82 compared to N < 82, despite the single unpaired proton dominating the behaviour of this complex many-body system. This challenges our previous understanding of these isotopes, which were considered a textbook example for the dominance of single-particle properties in nuclei [1, 2].
To investigate the microscopic origin of our experimental results, we performed a combined effort with developments in two complementary nuclear many-body methods: ab-initio valence space in-medium similarity normalization group [3,4] and density functional theory [5].
When compared with our experimental results, contributions from previously poorly constrained time-odd channels [6,7], and many-body currents [8] are found to be important, demonstrating electromagnetic properties of ‘proton-hole’ isotopes around magic shell closures at extreme proton-to-neutron ratios can give us crucial insights.
[1] - K. Heyde. The Nuclear Shell Model. Springer Series in Nuclear and Particle Physics. Springer Berlin Heidelberg, Berlin, Heidelberg, 1990.
[2] - J. Eberz et al. Nuclear Physics A, 464(1):9–28, 1987
[3] - R. Stroberg et al. Annual Review of Nuclear and Particle Science, 69(1), 2019.
[4] - P. Gysbers et al. Nature Physics, 15(5):428–431, 2019.
[5] - J. Dobaczewski et al. J. Phys. G: Nucl. Part. Phys., 48(10):102001, 2021.
[6] – J.Engel and J. Menéndez. Reports on Progress in Physics, 80(4):046301, 2017
[7] – J. Dobaczewski et al. Phys. Rev. Lett., 121:232501, 2018.
[8] - S. Pastore et al. Phys. Rev. C, 87:035503, 2013.
*This work was funded, in part, by the Department of Energy.
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