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4D-imaging of drip-line radioactivity by detecting proton emission from 54mNi pictured with ACTAR TPC

Giovinazzo, J. ; Roger, T. ; Blank, B. ; Rudolph, D. LU orcid ; Brown, B. A. ; Alvarez-Pol, H. ; Arokia Raj, A. ; Ascher, P. ; Caamaño-Fresco, M. and Caceres, L. , et al. (2021) In Nature Communications 12(1).
Abstract
Proton radioactivity was discovered exactly 50 years ago. First, this nuclear decay mode sets the limit of existence on the nuclear landscape on the neutron-deficient side. Second, it comprises fundamental aspects of both quantum tunnelling as well as the coupling of (quasi)bound quantum states with the continuum in mesoscopic systems such as the atomic nucleus. Theoretical approaches can start either from bound-state nuclear shell-model theory or from resonance scattering. Thus, proton-radioactivity guides merging these types of theoretical approaches, which is of broader relevance for any few-body quantum system. Here, we report experimental measurements of proton-emission branches from an isomeric state in 54mNi, which were... (More)
Proton radioactivity was discovered exactly 50 years ago. First, this nuclear decay mode sets the limit of existence on the nuclear landscape on the neutron-deficient side. Second, it comprises fundamental aspects of both quantum tunnelling as well as the coupling of (quasi)bound quantum states with the continuum in mesoscopic systems such as the atomic nucleus. Theoretical approaches can start either from bound-state nuclear shell-model theory or from resonance scattering. Thus, proton-radioactivity guides merging these types of theoretical approaches, which is of broader relevance for any few-body quantum system. Here, we report experimental measurements of proton-emission branches from an isomeric state in 54mNi, which were visualized in four dimensions in a newly developed detector. We show that these decays, which carry an unusually high angular momentum, ℓ = 5 and ℓ = 7, respectively, can be approximated theoretically with a potential model for the proton barrier penetration and a shell-model calculation for the overlap of the initial and final wave functions. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
proton radioactivity, isomeric decays, time-projection chamber, nuclear shell model
in
Nature Communications
volume
12
issue
1
article number
4805
pages
6 pages
publisher
Nature Publishing Group
external identifiers
  • scopus:85112115965
  • pmid:34376669
ISSN
2041-1723
DOI
10.1038/s41467-021-24920-0
project
Nuclear Structure at the Limits: Isotope-selective Spectroscopy
language
English
LU publication?
yes
id
6f589187-7bb0-486e-ae5e-68f4ffedb10a
alternative location
https://www.nature.com/articles/s41467-021-24920-0
date added to LUP
2021-08-10 14:44:20
date last changed
2024-03-08 15:13:07
@article{6f589187-7bb0-486e-ae5e-68f4ffedb10a,
  abstract     = {{Proton radioactivity was discovered exactly 50 years ago. First, this nuclear decay mode sets the limit of existence on the nuclear landscape on the neutron-deficient side. Second, it comprises fundamental aspects of both quantum tunnelling as well as the coupling of (quasi)bound quantum states with the continuum in mesoscopic systems such as the atomic nucleus. Theoretical approaches can start either from bound-state nuclear shell-model theory or from resonance scattering. Thus, proton-radioactivity guides merging these types of theoretical approaches, which is of broader relevance for any few-body quantum system. Here, we report experimental measurements of proton-emission branches from an isomeric state in <sup>54m</sup>Ni, which were visualized in four dimensions in a newly developed detector. We show that these decays, which carry an unusually high angular momentum, ℓ = 5 and ℓ = 7, respectively, can be approximated theoretically with a potential model for the proton barrier penetration and a shell-model calculation for the overlap of the initial and final wave functions.}},
  author       = {{Giovinazzo, J. and Roger, T. and Blank, B. and Rudolph, D. and Brown, B. A. and Alvarez-Pol, H. and Arokia Raj, A. and Ascher, P. and Caamaño-Fresco, M. and Caceres, L. and Cox, D. M. and Fernández-Domínguez, B. and Lois-Fuentes, J. and Gerbaux, M. and Grévy, S. and Grinyer, G. F. and Kamalou, O. and Mauss, B. and Mentana, A. and Pancin, J. and Pibernat, J. and Piot, J. and Sorlin, O. and Stodel, C. and Thomas, J.-C. and Versteegen, M.}},
  issn         = {{2041-1723}},
  keywords     = {{proton radioactivity; isomeric decays; time-projection chamber; nuclear shell model}},
  language     = {{eng}},
  month        = {{08}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{4D-imaging of drip-line radioactivity by detecting proton emission from <sup>54m</sup>Ni pictured with ACTAR TPC}},
  url          = {{http://dx.doi.org/10.1038/s41467-021-24920-0}},
  doi          = {{10.1038/s41467-021-24920-0}},
  volume       = {{12}},
  year         = {{2021}},
}