Peer-reviewed publication·2020Source verified
Multiferroic bismuth ferrite: Perturbed angular correlation studies on its ferroic α−β phase transition
Physical Review B 102, 224110
Perturbed angular correlation study of the ferroic α−β phase transition in multiferroic bismuth ferrite (PRB 102, 224110).
Materials physicsHyperfine interactions
Peer-reviewed publication·2020Source verified
Laser-assisted decay spectroscopy and mass spectrometry of 178Au
Physical Review C 102, 044332
Combined laser-assisted decay spectroscopy and mass spectrometry of ¹⁷⁸Au (PRC 102, 044332).
Nuclear physicsCERNISOLDELaser spectroscopy
Peer-reviewed publication·2020Source verified
Restoring the valence-shell stabilization in 140Nd
Physical Review C 102, 041304
Nuclear-structure study on restoring valence-shell stabilization in ¹⁴⁰Nd (PRC 102, 041304).
Nuclear physicsNuclear structure
Peer-reviewed publication·2020Source verified
Positron production using a 9 MeV electron linac for the GBAR experiment
Nuclear Instruments and Methods in Physics Research A 985, 164657
Describes positron production with a 9 MeV electron linac for the GBAR antimatter experiment.
Antimatter physicsGBARAccelerator technologyCERN
Peer-reviewed publication·2020Source verified
Laser-assisted decay spectroscopy for the ground states of 180,182Au
Physical Review C 102, 024312
Laser-assisted decay spectroscopy of the ground states of ¹⁸⁰,¹⁸²Au (PRC 102, 024312).
Nuclear physicsCERNISOLDELaser spectroscopy
Peer-reviewed publication·2020Source verified
Masses of short-lived 49Sc, 50Sc, 70As, 73Br and stable 196Hg nuclides
Nuclear Physics A 1002, 121990
Reports masses of short-lived ⁴⁹Sc, ⁵⁰Sc, ⁷⁰As, ⁷³Br and stable ¹⁹⁶Hg nuclides.
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2020Source verified
Examining the N = 28 shell closure through high-precision mass measurements of 46, 48Ar
Physical Review C 102, 014301
High-precision mass measurements of ⁴⁶, ⁴⁸Ar used to examine the N=28 shell closure (PRC 102, 014301).
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2020Source verified
Shape coexistence in 187Au studied by laser spectroscopy
Physical Review C 101, 064321
Laser-spectroscopy investigation of shape coexistence in ¹⁸⁷Au (PRC 101, 064321).
Nuclear physicsCERNISOLDELaser spectroscopy
Conference proceeding·2020Source verified
Coulomb Excitation of Proton-rich N = 80 Isotones at HIE-ISOLDE
Journal of Physics: Conference Series 1555, 012027
Coulomb-excitation study of proton-rich N=80 isotones at HIE-ISOLDE.
Nuclear physicsCERNISOLDECoulomb excitation
Peer-reviewed publication·2020Source verified
Hyperfine anomaly in gold and magnetic moments of Iπ = 11/2− gold isomers
Physical Review C 101, 034308
Laser-spectroscopy determination of hyperfine anomaly and magnetic moments of Iπ=11/2⁻ gold isomers (PRC 101, 034308).
Nuclear physicsCERNISOLDELaser spectroscopy
Peer-reviewed publication·2020Source verified
First Glimpse of the N = 82 Shell Closure below Z = 50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers
Physical Review Letters 124, 092502
Masses of neutron-rich cadmium isotopes and isomers providing a first glimpse of the N=82 shell closure below Z=50 (PRL 124, 092502).
Nuclear physicsCERNISOLDENuclear structure
Peer-reviewed publication·2020Source verified
Development of a PbWO4 Detector for Single-Shot Positron Annihilation Lifetime Spectroscopy at the GBAR Experiment
Acta Physica Polonica A 137, 122, 125
Development of a PbWO₄ detector for single-shot positron annihilation lifetime spectroscopy at CERN’s GBAR experiment.
Antimatter physicsGBARDetector electronicsCERN
Peer-reviewed publication·2020Source verified
Accumulation of Positrons from a LINAC Based Source
Acta Physica Polonica A 137, 164, 166
Reports positron accumulation from a LINAC-based source in the context of antimatter / GBAR beam preparation.
Antimatter physicsGBARAccelerator technologyCERN
Peer-reviewed publication·2019Source verified
A hyperfine look at titanium dioxide
AIP Advances 9, 085208
Hyperfine-interaction study of titanium dioxide, probing local electronic/structural environments.
Materials physicsHyperfine interactions
Peer-reviewed publication·2019Source verified
QEC-value determination for 21Na→21Ne and 23Mg→23Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP
Physical Review C 100, 015502
Determines Q_EC values for the ²¹Na→²¹Ne and ²³Mg→²³Na mirror decays with ISOLTRAP high-precision mass spectrometry (PRC 100, 015502).
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2019Source verified
Mass measurements of neutron-rich isotopes near N=20 by in-trap decay with the ISOLTRAP spectrometer
Physical Review C 100, 014304
Mass measurements of neutron-rich isotopes near N=20 using in-trap decay at ISOLTRAP (PRC 100, 014304).
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2019Source verified
Evaluation of high-precision atomic masses of A ∼ 50, 80 and rare-earth nuclides measured with ISOLTRAP
European Physical Journal A 55, 96
Evaluation and compilation of high-precision ISOLTRAP atomic masses for A∼50, 80 and rare-earth nuclides.
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2019Source verified
Direct decay-energy measurement as a route to the neutrino mass
Hyperfine Interactions 240, 61
Discusses direct decay-energy measurement as an experimental route toward neutrino-mass determination.
Nuclear physicsCERNISOLDENeutrino mass
Peer-reviewed publication·2019Source verified
Shape staggering of midshell mercury isotopes from in-source laser spectroscopy compared with density-functional-theory and Monte Carlo shell-model calculations
Physical Review C 99, 044306
Compares in-source laser-spectroscopy shape staggering of midshell mercury isotopes with DFT and Monte Carlo shell-model calculations (PRC 99, 044306).
Nuclear physicsCERNISOLDELaser spectroscopy
Conference proceeding·2018Source verified
Search for Isovector Valence-Shell Excitations in 140Nd and 142Sm via Coulomb excitation reactions of radioactive ion beams
EPJ Web of Conferences 194, 03003
Conference contribution on searching for isovector valence-shell excitations in ¹⁴⁰Nd and ¹⁴²Sm via Coulomb excitation of radioactive beams.
Nuclear physicsCERNISOLDECoulomb excitation
Peer-reviewed publication·2018Source verified
Change in structure between the I = 1/2 states in 181Tl and 177,179Au
Physics Letters B 786, 355
Investigates the structural change between I=1/2 states in ¹⁸¹Tl and ¹⁷⁷,¹⁷⁹Au.
Nuclear physicsCERNISOLDENuclear structure
Peer-reviewed publication·2018Source verified
Characterization of the shape-staggering effect in mercury nuclei
Nature Physics 14, 1163
Nature Physics study characterizing shape staggering in mercury nuclei using laser-spectroscopy observables.
Nuclear physicsCERNISOLDELaser spectroscopy
Doctoral thesis·2018Source verified
Implementation and commissioning of the phase-imaging ion-cyclotron-resonance method and mass measurements of exotic copper isotopes with ISOLTRAP
CERN / Technische Universität Dresden
Doctoral thesis of Dr. Andree Welker: he designed the PI-ICR electronics, wrote the software, commissioned the setup on beam at ISOLTRAP, then measured exotic copper including ⁷⁹Cu. Later Q-value and isomer papers have that instrument because this doctorate put it on beam.
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2018Source verified
Precision Mass Measurements of 58, 63Cr: Nuclear Collectivity Towards the N=40 Island of Inversion
Physical Review Letters 120, 232501
Precision mass measurements of ⁵⁸, ⁶³Cr mapping nuclear collectivity toward the N=40 island of inversion (PRL 120, 232501).
Nuclear physicsCERNISOLDENuclear structure
CERN research proposal·2018Source verified
Collinear resonance ionization spectroscopy of RaF molecules
CERN INTC
CERN INTC proposal for collinear resonance ionization spectroscopy of RaF molecules.
Nuclear physicsCERNISOLDEMolecular spectroscopy
Peer-reviewed publication·2017Source verified
Binding Energy of 79Cu: Probing the Structure of the Doubly Magic 78Ni from Only One Proton Away
Physical Review Letters 119, 192502
Precision mass/binding-energy measurement of ⁷⁹Cu with ISOLTRAP, probing the structure of doubly magic ⁷⁸Ni from only one proton away (PRL 119, 192502).
Nuclear physicsCERNISOLDENuclear structure
Peer-reviewed publication·2017Source verified
Viewpoint: Doubly Magic Nickel
Physics 10, 121
Physics Viewpoint highlighting the scientific implications of the ⁷⁹Cu / ⁷⁸Ni mass result for doubly magic nickel.
Nuclear physicsNuclear structure
Peer-reviewed publication·2017Source verified
Spectroscopy of the long-lived excited state in neutron-deficient 195,197,199Po by precision mass measurements
Physical Review C 96, 044325
Precision mass spectrometry of neutron-deficient ¹⁹⁵,¹⁹⁷,¹⁹⁹Po to characterize a long-lived excited state (PRC 96, 044325).
Nuclear physicsCERNISOLDENuclear spectroscopy
Peer-reviewed publication·2017Source verified
Precision electron-capture energy in 202Pb and its relevance for neutrino mass determination
European Physical Journal A 53, 153
Precision determination of the electron-capture energy in ²⁰²Pb and discussion of its relevance for neutrino-mass determination.
Nuclear physicsCERNISOLDENeutrino mass
Peer-reviewed publication·2017Source verified
Nuclear deformation in the A≈100 region: Comparison between new masses and mean-field predictions
Physical Review C 96, 014310
Compares new precision masses in the A≈100 region with mean-field predictions to assess nuclear deformation trends (PRC 96, 014310).
Nuclear physicsCERNISOLDENuclear structure
CERN research proposal·2017Source verified
Search for β-transitions with the lowest decay energy for a determination of the neutrino mass: precision Q-value measurements of 159Dy and 175Hf
CERN INTC
CERN INTC proposal for precision Q-value measurements of ¹⁵⁹Dy and ¹⁷⁵Hf toward neutrino-mass determination.
Nuclear physicsCERNISOLDENeutrino mass
CERN research proposal·2017Source verified
QEC value determination of the superallowed beta-decay of 70Br
CERN INTC
CERN INTC proposal to determine the Q_EC value of the superallowed β-decay of ⁷⁰Br.
Nuclear physicsCERNISOLDEWeak interaction
Peer-reviewed publication·2017Source verified
Extending and refining the nuclear mass surface with ISOLTRAP
Journal of Physics G 44
Overview of ISOLTRAP results that extend and refine the nuclear mass surface across regions relevant to nuclear structure and astrophysics.
Nuclear physicsCERNISOLDEMass spectrometry
Technical report·2017Source verified
First online application of the Phase-Imaging Ion-Cyclotron-Resonance technique at ISOLTRAP
ISOLDE Newsletter
ISOLDE Newsletter report on the first online application of the PI-ICR technique at ISOLTRAP.
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2017Source verified
Precision Mass Measurements with ISOLTRAP to Study the Evolution of the N = 82 Shell Gap far from Stability
CERN INTC
Addendum to the ISOLTRAP N=82 shell-gap mass-measurement programme at CERN INTC.
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2016Source verified
Penning-trap mass measurements of Zn and Cu isotopes relevant for the astrophysical rp-process
CERN INTC
CERN INTC letter of intent for Penning-trap mass measurements of Zn and Cu isotopes relevant to the astrophysical rp-process.
Nuclear physicsCERNISOLDENuclear astrophysics
Peer-reviewed publication·2016Source verified
Background-free beta-decay half-life measurements by in-trap decay and high-resolution MR-ToF mass analysis
Nuclear Instruments and Methods in Physics Research B 376, 275
Method paper on background-free β-decay half-life measurements using in-trap decay combined with high-resolution MR-ToF mass analysis.
Nuclear physicsCERNISOLDEBeta decay
CERN research proposal·2016Source verified
IS490: Seeking the onset of collectivity in neutron-rich krypton isotopes with ISOLTRAP
CERN INTC
CERN INTC addendum (IS490) seeking the onset of collectivity in neutron-rich krypton isotopes with ISOLTRAP.
Nuclear physicsCERNISOLDEMass spectrometry
Technical report·2016Source verified
Mass spectrometry of neutron-rich copper isotopes: a view of 78Ni from only one proton away
ISOLDE Newsletter
ISOLDE Newsletter report on mass spectrometry of neutron-rich copper isotopes as a view of ⁷⁸Ni from one proton away.
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2016Source verified
Mass spectrometry of neutron-rich chromium isotopes into the N = 40 island of inversion
CERN INTC
CERN INTC proposal for mass spectrometry of neutron-rich chromium isotopes into the N=40 island of inversion.
Nuclear physicsCERNISOLDEMass spectrometry
Peer-reviewed publication·2015Source verified
Precision Mass Measurements of 129, 131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process
Physical Review Letters 115, 232501
High-precision ISOLTRAP mass measurements of ¹²⁹, ¹³¹Cd used to constrain stellar nucleosynthesis via the rapid neutron-capture (r) process (PRL 115, 232501).
Nuclear physicsCERNISOLDENuclear astrophysics
Peer-reviewed publication·2015Source verified
Towards ultrahigh-resolution multi-reflection time-of-flight mass spectrometry at ISOLTRAP
Physica Scripta T166
Reports progress toward ultrahigh-resolution multi-reflection time-of-flight (MR-ToF) mass spectrometry at ISOLTRAP for improved isobar and isomer separation.
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2015Source verified
Shape-coexistence and shape-evolution studies for bismuth isotopes by in-source laser spectroscopy and beta-delayed fission in 188Bi
CERN INTC
CERN INTC proposal on shape coexistence/evolution in bismuth isotopes via in-source laser spectroscopy and β-delayed fission in ¹⁸⁸Bi.
Nuclear physicsCERNISOLDELaser spectroscopy
CERN research proposal·2014Source verified
In-source laser spectroscopy of mercury isotopes
CERN INTC
CERN INTC proposal (INTC-P-424) for in-source laser spectroscopy of mercury isotopes.
Nuclear physicsCERNISOLDELaser spectroscopy
CERN research proposal·2014Source verified
Search for β-transitions with the lowest decay energy for a determination of the neutrino mass
CERN INTC
CERN INTC proposal (INTC-P-410) to search for β-transitions with the lowest decay energy for neutrino-mass determination.
Nuclear physicsCERNISOLDENeutrino mass
CERN research proposal·2014Source verified
High precision mass measurements of odd-odd T=1 nuclides for the study of the Isobaric Multiplet Mass Equation
CERN INTC
CERN INTC letter of intent (INTC-I-157) for high-precision mass measurements of odd-odd T=1 nuclides to study the Isobaric Multiplet Mass Equation.
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2014Source verified
Beta-delayed fission, laser spectroscopy and shape-coexistence studies with astatine beams
CERN INTC
CERN INTC proposal on β-delayed fission, laser spectroscopy, and shape-coexistence studies with astatine beams.
Nuclear physicsCERNISOLDELaser spectroscopy
CERN research proposal·2014Source verified
Seeking the Purported Magic Number N = 32 with High-Precision Mass Spectrometry
CERN INTC
CERN INTC proposal seeking the purported magic number N=32 with high-precision mass spectrometry.
Nuclear physicsCERNISOLDEMass spectrometry
Technical report·2014Source verified
Report to the ISOLDE and Neutron Time-of-Flight Committee: Penning-trap mass measurements with ISOLTRAP
CERN INTC
Status report to the CERN INTC on Penning-trap mass measurements performed with ISOLTRAP (INTC-SR-034).
Nuclear physicsCERNISOLDEMass spectrometry
CERN research proposal·2013Source verified
Precision mass measurements with ISOLTRAP to study the evolution of the N=82 shell gap far from stability
CERN ISOLDE and Neutron Time-of-Flight Committee
CERN INTC proposal (INTC-P-382) for ISOLTRAP precision mass measurements to study the evolution of the N=82 shell gap far from stability.
Nuclear physicsCERNISOLDEMass spectrometry
Diploma thesis·2013Source link pending
Readout chain for high-resolution hadronic calorimeters with silicon photomultipliers
Johannes Gutenberg University Mainz, ATLAS Group / CALICE / ILC
Diploma thesis of Dr. Andree Welker: a one-year delivery of a 1 m, 12-layer PCB with four FPGAs as Link Data Aggregator. He designed and programmed board and firmware, populated the board, sent manufacture out for speed, took it to first beamtime, and analysed the data, turning thousands of data cables into one Ethernet link. That year is why the nuclear-physics doctorate was a direct next step.
High-energy physicsElectronicsFPGACalorimetry
Technical report·2013Source verified
The International Linear Collider Technical Design Report, Volume 2: Physics
International Linear Collider Collaboration
Listed signatory as A. Welker with affiliation 138, Johannes Gutenberg University Mainz, on the ILC Technical Design Report (Physics volume).
International Linear ColliderHigh-energy physicsParticle physicsHiggs physics
Conference proceeding·2012Source verified
Calorimetry for Lepton Collider Experiments, CALICE results and activities
CALICE Collaboration
CALICE collaboration report on calorimetry results and activities for lepton-collider experiments, covering highly granular calorimeter R&D relevant to future e⁺e⁻ machines.
High-energy physicsCalorimetryDetector electronics