Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Identification of Prompt Proton Emission in N = Z - 1 61Ga: Isospin Symmetry at the Limit of Nuclear Binding

Hrabar, Y. LU orcid ; Golubev, P. LU ; Rudolph, D. LU orcid ; Sarmiento, L. G. LU orcid ; Müller-Gatermann, C. ; Reviol, W. ; Seweryniak, D. ; Wu, J. ; Albers, H. M. and Anderson, J. T. , et al. (2025) In Physical Review Letters 135(22).
Abstract
Excited states in the proton drip line nucleus 61Ga were populated via the fusion-evaporation reaction 24Mg(40Ca,p2n)61Ga. The experimental setup at Argonne National Laboratory comprised a novel combination of the Gammasphere array with two CD-shaped double-sided Si-strip detectors inside the Microball CsI(Tl) charged-particle detection array, as well as the Neutron-Shell liquid scintillators and the Fragment Mass Analyzer. Owing to the setup’s unprecedented in-beam proton spectroscopy and tracking capabilities, a coincidence between a 957.6(5)-keV γ ray and a 1.876(24)-MeV proton line was observed, which identifies the quasibound proton πg9/2 single-particle state in... (More)
Excited states in the proton drip line nucleus 61Ga were populated via the fusion-evaporation reaction 24Mg(40Ca,p2n)61Ga. The experimental setup at Argonne National Laboratory comprised a novel combination of the Gammasphere array with two CD-shaped double-sided Si-strip detectors inside the Microball CsI(Tl) charged-particle detection array, as well as the Neutron-Shell liquid scintillators and the Fragment Mass Analyzer. Owing to the setup’s unprecedented in-beam proton spectroscopy and tracking capabilities, a coincidence between a 957.6(5)-keV γ ray and a 1.876(24)-MeV proton line was observed, which identifies the quasibound proton πg9/2 single-particle state in 61Ga at Ex = 2150(34) keV. This probes isospin symmetry at the limit of nuclear binding by providing a unique challenge for the shell-model
interpretation of mirror nuclei beyond doubly magic 56Ni. (Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
nuclear structure and decays, proton radioactivity, nuclear data analysis and compilation, radiation detectors, isospin symmetry, 59 <= A <= 89
in
Physical Review Letters
volume
135
issue
22
article number
222503
pages
6 pages
publisher
American Physical Society
ISSN
1079-7114
DOI
10.1103/kwm2-9bmd
project
Decay Modes of Exotic Nuclei
Nuclear Structure at the Limits: Isotope-selective Spectroscopy
language
English
LU publication?
yes
id
e228725a-2981-458b-85e5-84aa444a6c64
date added to LUP
2025-11-25 19:50:03
date last changed
2025-11-28 03:33:42
@article{e228725a-2981-458b-85e5-84aa444a6c64,
  abstract     = {{Excited states in the proton drip line nucleus <sup>61</sup>Ga were populated via the fusion-evaporation reaction <sup>24</sup>Mg(<sup>40</sup>Ca,<i>p</i>2n)<sup>61</sup>Ga. The experimental setup at Argonne National Laboratory comprised a novel combination of the Gammasphere array with two CD-shaped double-sided Si-strip detectors inside the Microball CsI(Tl) charged-particle detection array, as well as the Neutron-Shell liquid scintillators and the Fragment Mass Analyzer. Owing to the setup’s unprecedented in-beam proton spectroscopy and tracking capabilities, a coincidence between a 957.6(5)-keV γ ray and a 1.876(24)-MeV proton line was observed, which identifies the quasibound proton πg<sub>9/2</sub> single-particle state in <sup>61</sup>Ga at <i>E</i><sub>x</sub> = 2150(34) keV. This probes isospin symmetry at the limit of nuclear binding by providing a unique challenge for the shell-model<br/>interpretation of mirror nuclei beyond doubly magic <sup>56</sup>Ni.}},
  author       = {{Hrabar, Y. and Golubev, P. and Rudolph, D. and Sarmiento, L. G. and Müller-Gatermann, C. and Reviol, W. and Seweryniak, D. and Wu, J. and Albers, H. M. and Anderson, J. T. and Bentley, M. A. and Carlsson, B. G. and Carpenter, M. P. and Chiara, C. J. and Copp, P. A. and Cox, D. M. and Ekman, J. and Fahlander, C. and Forsberg, U. and Huang, T. and Idini, A. and Jayatissa, H. and Lauritsen, T. and Pereira-Lopez, X. and Stolze, S. and Uthayakumaar, S. and Wilson, G. L.}},
  issn         = {{1079-7114}},
  keywords     = {{nuclear structure and decays; proton radioactivity; nuclear data analysis and compilation; radiation detectors; isospin symmetry; 59 <= A <= 89}},
  language     = {{eng}},
  month        = {{11}},
  number       = {{22}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Identification of Prompt Proton Emission in <i>N</i> = Z - 1 <sup>61</sup>Ga: Isospin Symmetry at the Limit of Nuclear Binding}},
  url          = {{https://lup.lub.lu.se/search/files/233935464/kwm2-9bmd.pdf}},
  doi          = {{10.1103/kwm2-9bmd}},
  volume       = {{135}},
  year         = {{2025}},
}