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Featured researches published by A. Gottberg.


ChemPhysChem | 2014

Billion‐Fold Enhancement in Sensitivity of Nuclear Magnetic Resonance Spectroscopy for Magnesium Ions in Solution

A. Gottberg; Monika Stachura; Magdalena Kowalska; M. L. Bissell; Vaida Arcisauskaite; Klaus Blaum; Alexander Helmke; Karl Johnston; Kim Dieter Kreim; Flemming H. Larsen; R. Neugart; G. Neyens; Ronald Garcia Ruiz; Dániel Szunyogh; Peter W. Thulstrup; D. T. Yordanov; Lars Hemmingsen

β-nuclear magnetic resonance (NMR) spectroscopy is highly sensitive compared to conventional NMR spectroscopy, and may be applied for several elements across the periodic table. β-NMR has previously been successfully applied in the fields of nuclear and solid-state physics. In this work, β-NMR is applied, for the first time, to record an NMR spectrum for a species in solution. (31)Mg β-NMR spectra are measured for as few as 10(7) magnesium ions in ionic liquid (EMIM-Ac) within minutes, as a prototypical test case. Resonances are observed at 3882.9 and 3887.2 kHz in an external field of 0.3 T. The key achievement of the current work is to demonstrate that β-NMR is applicable for the analysis of species in solution, and thus represents a novel spectroscopic technique for use in general chemistry and potentially in biochemistry.


Journal of the American Chemical Society | 2017

Direct Observation of Nanosecond Water Exchange Dynamics at a Protein Metal Site

Monika Stachura; Saumen Chakraborty; A. Gottberg; Leela Ruckthong; Vincent L. Pecoraro; Lars Hemmingsen

Nanosecond ligand exchange dynamics at metal sites within proteins is essential in catalysis, metal ion transport, and regulatory metallobiochemistry. Herein we present direct observation of the exchange dynamics of water at a Cd2+ binding site within two de novo designed metalloprotein constructs using 111mCd perturbed angular correlation (PAC) of γ-rays and 113Cd NMR spectroscopy. The residence time of the Cd2+-bound water molecule is tens of nanoseconds at 20 °C in both proteins. This constitutes the first direct experimental observation of the residence time of Cd2+ coordinated water in any system, including the simple aqua ion. A Leu to Ala amino acid substitution ∼10 Å from the Cd2+ site affects both the equilibrium constant and the residence time of water, while, surprisingly, the metal site structure, as probed by PAC spectroscopy, remains essentially unaltered. This implies that remote mutations may affect metal site dynamics, even when structure is conserved.


EPL | 2016

The 68mCu/68Cu isotope as a new probe for hyperfine studies: The nuclear moments

A. S. Fenta; S. Pallada; J. G. Correia; M. Stachura; K. Johnston; A. Gottberg; A. Mokhles Gerami; J. Röder; H. Grawe; B. A. Brown; U. Köster; T.M. Mendonça; J.P. Ramos; B. A. Marsh; T. Day Goodacre; V. S. Amaral; L. M. C. Pereira; María José García Borge; H. Haas

Time Differential Perturbed Angular Correlation of γ-rays (TDPAC) experiments were performed for the first time in the decay of 68m Cu produced at the ISOLDE facility at CERN. Due to the short half-life of the source isotope, the measurements were carried out online. The intermediate state offers the unique opportunity to study the electromagnetic fields acting at a copper probe in condensed matter via hyperfine interactions. The present work allowed determination of the nuclear moments for this state. The electric quadrupole moment was obtained from an experiment performed in Cu2O and the magnetic dipole moment from measurements in cobalt and nickel foils. The results are discussed in the framework of shell model calculations and the additivity rule for nuclear moments with respect to the robustness of the N = 40 sub-shell.


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2014

Intense 31–35Ar beams produced with a nanostructured CaO target at ISOLDE

J.P. Ramos; A. Gottberg; T.M. Mendonca; C. Seiffert; A.M.R. Senos; H. O. U. Fynbo; Olof Tengblad; J.A. Briz; M.V. Lund; G.T. Koldste; M. Carmona-Gallardo; V. Pesudo; T. Stora


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2013

First application of the Laser Ion Source and Trap (LIST) for on-line experiments at \{ISOLDE\}

Daniel Fink; S.D. Richter; B. Bastin; Klaus Blaum; R. Catherall; T. E. Cocolios; D. V. Fedorov; Valentin Fedosseev; K. T. Flanagan; L. Ghys; A. Gottberg; N. Imai; T. Kron; N. Lecesne; K. M. Lynch; B. A. Marsh; T.M. Mendonca; D. Pauwels; E. Rapisarda; J.P. Ramos; R.E. Rossel; S. Rothe; Seliverstov; M. Sjödin; T. Stora; C. Van Beveren; K. Wendt


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2016

Characterization of uranium carbide target materials to produce neutron-rich radioactive beams

S. Tusseau-Nenez; B. Roussière; Nicole Barré-Boscher; A. Gottberg; S. Corradetti; A. Andrighetto; Maher Cheikh Mhamed; S. Essabaa; Hanna Franberg-Delahaye; Joanna Grinyer; Loïc Joanny; C. Lau; Joseph Le Lannic; Marc Raynaud; A. Said; T. Stora; O. Tougait


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2016

Target nanomaterials at CERN-ISOLDE: synthesis and release data

J.P. Ramos; A. Gottberg; R.S. Augusto; T.M. Mendonca; K. Riisager; C. Seiffert; Paul Bowen; A.M.R. Senos; T. Stora


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2016

Blurring the boundaries between ion sources: The application of the RILIS inside a FEBIAD type ion source at ISOLDE

T. Day Goodacre; J. Billowes; R. Catherall; T. E. Cocolios; B. Crepieux; D. V. Fedorov; Valentin Fedosseev; L. P. Gaffney; T. Giles; A. Gottberg; K. M. Lynch; B. A. Marsh; T.M. Mendonca; J.P. Ramos; R.E. Rossel; S. Rothe; S. Sels; C. Sotty; T. Stora; C. Van Beveren; M. Veinhard


Physical Review X | 2015

In-source laser spectroscopy with the Laser Ion Source and Trap: first direct study of the ground-state properties of 217,219Po

Daniel Fink; T. E. Cocolios; A. N. Andreyev; S. Antalic; A. Barzakh; B. Bastin; D. V. Fedorov; V. N. Fedosseev; K. T. Flanagan; L. Ghys; A. Gottberg; Mark Huyse; N. Imai; T. Kron; N. Lecesne; K. M. Lynch; B. A. Marsh; D. Pauwels; E. Rapisarda; S.D. Richter; R.E. Rossel; S. Rothe; M. D. Seliverstov; A. M. Sjoedin; C. Van Beveren; P. Van Duppen; K. Wendt


Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2015

On-line implementation and first operation of the Laser Ion Source and Trap at ISOLDE/CERN

Daniel Fink; S.D. Richter; Klaus Blaum; R. Catherall; B. Crepieux; Valentin Fedosseev; A. Gottberg; T. Kron; B. A. Marsh; C. Mattolat; S. Raeder; R.E. Rossel; S. Rothe; F. Schwellnus; M. D. Seliverstov; M. Sjödin; T. Stora; P. Suominen; K. Wendt

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