Johan Nyberg
Professor at Department of Physics and Astronomy; Nuclear Physics
- Telephone:
- +46 18 471 30 47
- Mobile phone:
- +46 70 425 05 04
- E-mail:
- johan.nyberg@physics.uu.se
- Visiting address:
- Ångströmlaboratoriet, Regementsvägen 10
752 37 Uppsala - Postal address:
- Box 524
751 20 UPPSALA
Professor at Department of Physics and Astronomy; The Svedberg laboratory
- Mobile phone:
- +46 70 425 05 04
- E-mail:
- Johan.Nyberg@physics.uu.se
- Visiting address:
- Thunbergsv. 3D
752 38 Uppsala - Postal address:
- Box 524
751 20 Uppsala
Short presentation
My research field is experimental nuclear physics with investigations of the structure of nuclei with a deficit or an excess of neutrons compared to the naturally occurring isotopes of each element. The main focus is currently on studies of neutron deficient nuclei in the mass region around the doubly magic nucleus 100Sn with 50 protons and 50 neutrons.

Publications
Recent publications
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Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
Part of Physical Review C, 2026
- DOI for Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
- Download full text (pdf) of Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
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Part of Nuclear Instruments and Methods in Physics Research Section A, 2026
- DOI for Determining the minimum detectable activity of coincidence HPGe γ-ray spectrometers using simulation tools
- Download full text (pdf) of Determining the minimum detectable activity of coincidence HPGe γ-ray spectrometers using simulation tools
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Fusion of 12C+28Si at deep sub-barrier energies
Part of Physics Letters B, 2026
- DOI for Fusion of 12C+28Si at deep sub-barrier energies
- Download full text (pdf) of Fusion of 12C+28Si at deep sub-barrier energies
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Part of Physical Review C, 2025
- DOI for Lifetime measurements of low-lying states in odd-mass isotopes 117,119Te and the nature of vibration in Te isotopes
- Download full text (pdf) of Lifetime measurements of low-lying states in odd-mass isotopes 117,119Te and the nature of vibration in Te isotopes
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2025
All publications
Articles in journal
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Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
Part of Physical Review C, 2026
- DOI for Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
- Download full text (pdf) of Anomalous quadrupole transition probabilities in the f7/2 mirror nuclei
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Part of Nuclear Instruments and Methods in Physics Research Section A, 2026
- DOI for Determining the minimum detectable activity of coincidence HPGe γ-ray spectrometers using simulation tools
- Download full text (pdf) of Determining the minimum detectable activity of coincidence HPGe γ-ray spectrometers using simulation tools
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Fusion of 12C+28Si at deep sub-barrier energies
Part of Physics Letters B, 2026
- DOI for Fusion of 12C+28Si at deep sub-barrier energies
- Download full text (pdf) of Fusion of 12C+28Si at deep sub-barrier energies
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Part of Physical Review C, 2025
- DOI for Lifetime measurements of low-lying states in odd-mass isotopes 117,119Te and the nature of vibration in Te isotopes
- Download full text (pdf) of Lifetime measurements of low-lying states in odd-mass isotopes 117,119Te and the nature of vibration in Te isotopes
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Probing Exotic Cross-Shell Interactions at N=28 with Single-Neutron Transfer on 47K
Part of Physical Review Letters, 2025
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Part of Nuclear Science and Techniques, 2025
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Part of Nuclear Science and Techniques, 2025
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Lifetime measurement of the yrast 2+ state in 118Te
Part of European Physical Journal A, 2023
- DOI for Lifetime measurement of the yrast 2+ state in 118Te
- Download full text (pdf) of Lifetime measurement of the yrast 2+ state in 118Te
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Search for Na-22 in novae supported by a novel method for measuring femtosecond nuclear lifetimes
Part of Nature Communications, 2023
- DOI for Search for Na-22 in novae supported by a novel method for measuring femtosecond nuclear lifetimes
- Download full text (pdf) of Search for Na-22 in novae supported by a novel method for measuring femtosecond nuclear lifetimes
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Conceptual design of the AGATA 2 pi array at LNL
Part of Nuclear Instruments and Methods in Physics Research Section A, 2023
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High-Precision Spectroscopy of 20O Benchmarking Ab Initio Calculations in Light Nuclei
Part of Physical Review Letters, 2023
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Part of European Physical Journal A, 2023
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AGATA: nuclear structure advancements with fusion-evaporation reactions
Part of European Physical Journal A, 2023
- DOI for AGATA: nuclear structure advancements with fusion-evaporation reactions
- Download full text (pdf) of AGATA: nuclear structure advancements with fusion-evaporation reactions
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Spectroscopic quadrupole moments in 124Xe
Part of Physical Review C, 2023
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Evidence for spherical-oblate shape coexistence in Tc-87
Part of Physical Review C, 2022
- DOI for Evidence for spherical-oblate shape coexistence in Tc-87
- Download full text (pdf) of Evidence for spherical-oblate shape coexistence in Tc-87
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Evidence of Partial Seniority Conservation in the pi g9/2 Shell for the N=50 Isotones
Part of Physical Review Letters, 2022
- DOI for Evidence of Partial Seniority Conservation in the pi g9/2 Shell for the N=50 Isotones
- Download full text (pdf) of Evidence of Partial Seniority Conservation in the pi g9/2 Shell for the N=50 Isotones
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Artificial neural networks for neutron/gamma discrimination in the neutron detectors of NEDA
Part of Nuclear Instruments and Methods in Physics Research Section A, 2021
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Part of Physics Letters B, 2021
- DOI for The (6+) isomer in 102Sn revisited: Neutron and proton effective charges close to the double shell closure
- Download full text (pdf) of The (6+) isomer in 102Sn revisited: Neutron and proton effective charges close to the double shell closure
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Part of Physical Review C, 2021
- DOI for Reinterpretation of excited states in Po-212: Shell-model multiplets rather than alpha-cluster states
- Download full text (pdf) of Reinterpretation of excited states in Po-212: Shell-model multiplets rather than alpha-cluster states
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Lifetime measurements in the even-even 102-108Cd isotopes
Part of Physical Review C, 2021
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Part of Physical Review C, 2021
- DOI for Evidence for enhanced neutron-proton correlations from the levelstructure of the N= Z+ 1 nucleus 8743Tc44
- Download full text (pdf) of Evidence for enhanced neutron-proton correlations from the levelstructure of the N= Z+ 1 nucleus 8743Tc44
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Part of SN Applied Sciences, 2020
- DOI for Simulation of the response of a segmented High-Purity Germanium detector for gamma emission tomography of nuclear fuel
- Download full text (pdf) of Simulation of the response of a segmented High-Purity Germanium detector for gamma emission tomography of nuclear fuel
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Part of Physics Letters B, 2020
- DOI for Low-lying electric dipole gamma-continuum for the unstable Fe-62,64 nuclei: Strength evolution with neutron number
- Download full text (pdf) of Low-lying electric dipole gamma-continuum for the unstable Fe-62,64 nuclei: Strength evolution with neutron number
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Lifetimes of core-excited states in semi-magic Rh-95
Part of European Physical Journal A, 2020
- DOI for Lifetimes of core-excited states in semi-magic Rh-95
- Download full text (pdf) of Lifetimes of core-excited states in semi-magic Rh-95
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Part of Physics Letters B, 2020
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Part of Physical Review C, 2020
- DOI for Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-20
- Download full text (pdf) of Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-20
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Part of Physical Review Letters, 2020
- DOI for Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus Ru-88
- Download full text (pdf) of Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus Ru-88
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Part of Nuclear Instruments and Methods in Physics Research Section A, p. 81-86, 2019
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The New Neutron Multiplicity Filter NEDA and Its First Physics Campaign with AGATA
Part of Acta Physica Polonica B, p. 585-590, 2019
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Part of Nuclear Instruments and Methods in Physics Research Section A, p. 238-245, 2019
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Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32
Part of Physical Review C, 2019
- DOI for Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32
- Download full text (pdf) of Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=32
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Isospin dependence of electromagnetic transition strengths among an isobaric triplet
Part of Physics Letters B, 2019
- DOI for Isospin dependence of electromagnetic transition strengths among an isobaric triplet
- Download full text (pdf) of Isospin dependence of electromagnetic transition strengths among an isobaric triplet
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Evidence of octupole-phonons at high spin in Pb-207
Part of Physics Letters B, 2019
- DOI for Evidence of octupole-phonons at high spin in Pb-207
- Download full text (pdf) of Evidence of octupole-phonons at high spin in Pb-207
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Pulse pile-up identification and reconstruction for liquid scintillator based neutron detectors
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 59-65, 2018
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Part of Physical Review Letters, 2018
- DOI for Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the Ni-78 Region: A Hint from Lifetime Measurements
- Download full text (pdf) of Pseudospin Symmetry and Microscopic Origin of Shape Coexistence in the Ni-78 Region: A Hint from Lifetime Measurements
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M1 And E2 Transition Rates From Core-Excited States In Semi-Magic Ru-94
Part of European Physical Journal A, 2018
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Neutron Skin Effects in Mirror Energy Differences: The Case of Mg-23-Na-23
Part of Physical Review Letters, 2018
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Conceptual design of the AGATA 1 π array at GANIL
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 1-12, 2017
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Lifetime measurement of neutron-rich even-even molybdenum isotopes
Part of Physical Review C, 2017
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Isospin Symmetry Breaking In Mirror Nuclei Mg-23-Na-23
Part of Acta Physica Polonica B, p. 313-318, 2017
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Study Of Quadrupole Correlations In N = Z=5 0 Region Via Lifetime Measurements
Part of Acta Physica Polonica B, p. 331-336, 2017
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Part of Acta Physica Polonica B, p. 325-329, 2017
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Measurement of lifetimes in Fe-62,Fe-64, Co-61,Co-63, and Mn-59
Part of PHYSICAL REVIEW C, 2017
- DOI for Measurement of lifetimes in Fe-62,Fe-64, Co-61,Co-63, and Mn-59
- Download full text (pdf) of Measurement of lifetimes in Fe-62,Fe-64, Co-61,Co-63, and Mn-59
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Performance of the AGATA gamma-ray spectrometer in the PreSPEC set-up at GSI
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 258-266, 2016
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Conceptual design of the early implementation of the NEutron Detector Array (NEDA) with AGATA
Part of European Physical Journal A, 2016
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Part of IEEE Transactions on Nuclear Science, p. 1056-1062, 2015
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Digital Front-End Electronics for the Neutron Detector NEDA
Part of IEEE Transactions on Nuclear Science, p. 1063-1069, 2015
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Digital pulse-timing technique for the neutron detector array NEDA
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 71-76, 2015
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Part of Nuclear Instruments and Methods in Physics Research Section A, p. 83-91, 2014
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Identification and rejection of scattered neutrons in AGATA
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 267-276, 2014
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Part of Physical Review C. Nuclear Physics, 2014
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Spectroscopy of the neutron-deficient N=50 nucleus Rh-95
Part of Physical Review C. Nuclear Physics, 2014
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Analysis and results of the 104 Sn Coulomb excitation experiment
Part of Journal of Physics: Conference Series, 2014
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Part of IEEE Transactions on Nuclear Science, p. 3526-3531, 2013
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gamma-ray linear polarization measurements and (g(9/2))(-3) neutron alignment in Ru-91
Part of Physical Review C. Nuclear Physics, 2013
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Coulomb Excitation of Sn-104 and the Strength of the Sn-100 Shell Closure
Part of Physical Review Letters, p. 172501, 2013
- DOI for Coulomb Excitation of Sn-104 and the Strength of the Sn-100 Shell Closure
- Download full text (pdf) of Coulomb Excitation of Sn-104 and the Strength of the Sn-100 Shell Closure
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Odd-Parity Sn-100 Core Excitations
Part of Acta Physica Polonica B, p. 491-500, 2013
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Odd-parity 100 Sn Core Excitations
Part of Acta Physica Polonica B, p. 491, 2013
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Monte Carlo simulation of a single detector unit for the neutron detector array NEDA
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 64-72, 2012
- DOI for Monte Carlo simulation of a single detector unit for the neutron detector array NEDA
- Download full text (pdf) of Monte Carlo simulation of a single detector unit for the neutron detector array NEDA
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AGATA -Advanced GAmma Tracking Array
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 26-58, 2012
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Superallowed Gamow-Teller decay of the doubly magic nucleus 100Sn
Part of Nature, p. 341-345, 2012
- DOI for Superallowed Gamow-Teller decay of the doubly magic nucleus 100Sn
- Download full text (pdf) of Superallowed Gamow-Teller decay of the doubly magic nucleus 100Sn
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Influence of the np interaction on the beta decay of Pd-94
Part of Physical Review C. Nuclear Physics, 2012
- DOI for Influence of the np interaction on the beta decay of Pd-94
- Download full text (pdf) of Influence of the np interaction on the beta decay of Pd-94
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N=50 core excited states studied in the 4696Pd50 nucleus
Part of Physical Review C. Nuclear Physics, 2012
- DOI for N=50 core excited states studied in the 4696Pd50 nucleus
- Download full text (pdf) of N=50 core excited states studied in the 4696Pd50 nucleus
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Part of Journal of Physics, Conference Series, 2012
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Part of Physical Review C. Nuclear Physics, 2012
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Part of Journal of Physics: Conference Series, 2012
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Study of the Order-to-Chaos transition in 174 W with the AGATA-Demonstrator
Part of Journal of Physics: Conference Series, 2012
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Isomer and β-decay spectroscopy of Tz=1 isotopes below the N=Z=50 shell gap
Part of Journal of Physics: Conference Series, 2011
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Interaction position resolution simulations and in-beam measurements of the AGATA HPGe detectors
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 96-109, 2011
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Pair and single neutron transfer with Borromean He-8
Part of Physics Letters B, p. 454-458, 2011
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Evidence for a spin-aligned neutron-proton paired phase from the level structure of Pd-92
Part of Nature, p. 68-71, 2011
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High-spin isomers in (96)Ag: Excitations across the Z=38 and Z=50, N=50 closed shells
Part of Physical Review C. Nuclear Physics, 2011
- DOI for High-spin isomers in (96)Ag: Excitations across the Z=38 and Z=50, N=50 closed shells
- Download full text (pdf) of High-spin isomers in (96)Ag: Excitations across the Z=38 and Z=50, N=50 closed shells
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16(+) Spin-Gap Isomer in (96)Cd
Part of Physical Review Letters, p. 172502, 2011
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Interaction position resolution simulations and in-beam measurements of the AGATA HPGe detectors
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 96-109, 2011
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Pair and single neutron transfer with Borromean 8He
Part of Physics Letters B, p. 454-458, 2011
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Exotic nuclear studies around and below Aâ=â100
Part of AIP Conference Proceedings, p. 19-24, 2011
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Isomer and β -decay spectroscopy of T z =1 isotopes below the N=Z=50 shell gap
Part of Journal of Physics: Conference Series, 2011
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Spectroscopy of neutron-rich Dy-168,Dy-170: Yrast band evolution close to the NpNn valence maximum
Part of Physical Review C. Nuclear Physics, 2010
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Observation of a new high-spin isomer in Pd-94
Part of Physical Review C. Nuclear Physics, 2010
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Reactions with the double-Borromean nucleus 8He
Part of Physical Review C. Nuclear Physics, 2010
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Neutron correlations in 6He viewed through nuclear break-up
Part of Modern Physics Letters A, p. 1846-1849, 2010
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High-energy excited states in 98 Cd
Part of Journal of Physics: Conference Series, 2010
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Part of Physical Review C, 2010
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Observation of a new high-spin isomer in $^{94}\mathrm{Pd}$
Part of Physical Review C, 2010
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Structure of heavy Fe nuclei at the point of transition at N ~ 37
Part of Acta Physica Polonica B, p. 477-480, 2009
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Structure of heavy Fe nuclei at the point of transition at N simular to 37
Part of Acta Physica Polonica B, p. 477-480, 2009
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Part of Nuclear Instruments and Methods in Physics Research Section A, p. 534-539, 2009
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Part of Nuclear Instruments and Methods in Physics Research Section A, p. 534-539, 2009
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Neutron correlations in 6He viewed through nuclear break-up
Part of European Physical Journal A, p. 441-446, 2009
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The northwest frontier: spectroscopy of N ~ Z nuclei below mass 100
Part of Acta Physica Polonica B, p. 611-620, 2009
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Position resolution of the prototype AGATA triple-cluster detector from an in-beam experiment
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 555-562, 2009
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Discrimination of gamma rays due to inelastic neutron scattering in AGATA
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 554-563, 2009
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X rays from 80-cm long sparks in air
Part of Geophysical Research Letters, 2008
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Digital pulse-shape discrimination of fast neutrons and gamma rays
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 79-89, 2008
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Lifetime measurements of the negative-parity ${7}^{-}$ and ${8}^{-}$ states in $^{122}\mathrm{Cd}$
Part of Physical Review C, 2008
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$1n$ and $2n$ Transfer With the Borromean Nucleus $^{6}\mathrm{He}$ Near the Coulomb Barrier
Part of Physical Review Letters, 2008
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The single-particle and collective features in the nuclei just above 132Sn
Part of Acta Physica Polonica B, p. 1213-1218, 2007
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Low-spin collective behavior in the transitional nuclei Mo-86,Mo-88
Part of Physical Review C. Nuclear Physics, 2007
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The single-particle and collective features in the nuclei just above Sn-132
Part of Acta Physica Polonica B, p. 1213-1218, 2007
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Low-spin collective behavior in the transitional nuclei $^{86,88}\mathrm{Mo}$
Part of Physical Review C, 2007
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Lifetime measurement of the 167.1 keV state in $^{41}\mathrm{Ar}$
Part of Physical Review C, 2007
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A method for measuring light ion reaction cross-sections
Part of Nuclear Instruments and Methods in Physics Research Section A, p. 541-554, 2005
Articles, review/survey
Collections (editor)
Conference papers
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2025
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2019
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Analysis of the Response of AGATA Detectors at GSI
Part of CGS15 - CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS, 2015
- DOI for Analysis of the Response of AGATA Detectors at GSI
- Download full text (pdf) of Analysis of the Response of AGATA Detectors at GSI
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Order-to-chaos transition in warm rotating 174W nuclei
Part of Proc. Int. School of Physics Enrico Fermi, p. 427, 2011
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Response of AGATA segmented HPGe detectors to gamma-rays up to 15.1 MeV
Part of Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2011 IEEE, p. 1147-1149, 2011
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Part of AIP conference Proceedings, p. 5502, 2009
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AGATA: Gamma-ray tracking in segmented HPGedetectors
Part of 17th International Workshop on Vertex detectors, 2009