T. Nilsson
A5057044415- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Particle Detector Development and Performance
- Advanced Chemical Physics Studies
- Photosynthetic Processes and Mechanisms
- Astro and Planetary Science
- Quantum, superfluid, helium dynamics
- Photoreceptor and optogenetics research
- X-ray Spectroscopy and Fluorescence Analysis
- Mass Spectrometry Techniques and Applications
- Boron Compounds in Chemistry
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Radiative Heat Transfer Studies
- Radioactive Decay and Measurement Techniques
Chalmers University of Technology
2014-2024
Goethe University Frankfurt
2002-2024
Université Paris-Saclay
2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2023
CEA Paris-Saclay
2023
European Spallation Source
2023
Stockholm University
1996-2023
Universidade de Santiago de Compostela
2016-2022
Saha Institute of Nuclear Physics
2020-2021
Technical University of Darmstadt
2005-2020
Radioactive ion beam facilities are transforming nuclear science by making beams of exotic nuclei with various properties available for experiments. New infrastructures and development existing installations enlarges the scientific scope continuously. An overview main production, separation handling methods focus on recent developments is done, as well a survey forthcoming world-wide.
A long-standing question in nuclear physics is whether chargeless systems can exist. To our knowledge, only neutron stars represent near-pure systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron has been an ongoing quest several decades1, with a particular focus on four-neutron system called tetraneutron, resulting few indications of its existence so far2-4, leaving tetraneutron elusive six...
The three-body breakup ${}^{6}{\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}}^{4}\mathrm{He}+n+n$ is studied experimentally, using a secondary ${}^{6}\mathrm{He}$ ion beam of 240 MeV/nucleon incident on carbon and lead targets. Integrated cross sections for one- two-neutron knockout differential $d\ensuremath{\sigma}{/dE}^{*}$ $d\ensuremath{\sigma}/d\ensuremath{\vartheta}$ inelastic nuclear or electromagnetic excitations into the continuum are presented. $E$1-strength distribution deduced...
The first measurement of the momentum distribution for one-neutron removal from $^{24}\mathrm{O}$ at $920A\text{ }\text{ }\mathrm{MeV}$ performed GSI, Darmstadt is reported. observed has a width (FWHM) $99\ifmmode\pm\else\textpm\fi{}4\text{ }\mathrm{MeV}/c$ in projectile rest frame and cross section $63\ifmmode\pm\else\textpm\fi{}7\text{ }\mathrm{mb}$. results are well explained with nearly pure $2{s}_{1/2}$ neutron spectroscopic factor $1.74\ifmmode\pm\else\textpm\fi{}0.19$ within eikonal...
The E1 strength distribution in Ni68 has been investigated using Coulomb excitation inverse kinematics at the RB3−LAND setup and by measuring invariant mass one- two-neutron decay channels. giant dipole resonance a low-lying peak (pygmy resonance) have observed 17.1(2) 9.55(17) MeV, respectively. measured polarizability is compared to relativistic random phase approximation calculations yielding neutron-skin thickness of 0.17(2) fm. A method analysis applicable neutron-rich nuclei developed,...
The first measurement of the elastic scattering halo nucleus 11Li and its core 9Li on 208Pb at energies near Coulomb barrier is presented. 11Li+208Pb shows a strong reduction with respect to Rutherford cross section, even well below down very small angles. This drastic change differential section observed in consequence structure 11Li, as it not same energies. Four-body continuum-discretized coupled-channels calculations, based three-body model projectile, are found explain measured angular...
The violation of Baryon Number, $\mathcal{B}$, is an essential ingredient for the preferential creation matter over antimatter needed to account observed baryon asymmetry in universe. However, such a process has yet be experimentally observed. HIBEAM/NNBAR %experiment program proposed two-stage experiment at European Spallation Source (ESS) search number violation. will include high-sensitivity searches processes that violate by one or two units: free neutron-antineutron oscillation...
Subjecting a physical system to extreme conditions is one of the means often used obtain better understanding and deeper insight into its organization structure. In case atomic nucleus, such approach investigate isotopes that have very different neutron-to-proton (N/Z) ratios than in stable nuclei. Light, neutron-rich exhibit most asymmetric N/Z those lying beyond limits binding, which undergo spontaneous neutron emission exist only as short-lived resonances (about 10-21 s), provide...
Peripheral fragmentation of a 287 MeV/nucleon beam the halo nucleus ${}^{11}\mathrm{Li}$ incident on carbon target has been studied in fragment-neutron coincidence experiment. The momentum distribution ${}^{10}\mathrm{Li}$ fragments gives access to removed neutron ${}^{11}\mathrm{Li}$. From shape distribution, $({1s}_{1/2}{)}^{2}$ contribution mixture and $({0p}_{1/2}{)}^{2}$ components ground-state wave function was determined be $(45\ifmmode\pm\else\textpm\fi{}10)%$. angular correlation...
The breakup of 12Be into 6He+6He and 4He+8He has been studied using a 378 MeV beam inelastically excited by 12C (CH2)n targets. measurements indicate that occurs from rotational states in the 10 to 25 excitation energy interval, with spins range 4ħ 8ħ. inferred moment inertia is consistent cluster decay an exotic molecular structure 12Be, which may be associated α−4n−α configuration.Received 11 August 1998DOI:https://doi.org/10.1103/PhysRevLett.82.1383©1999 American Physical Society
The very neutron-rich oxygen isotopes ${}^{25}$O and ${}^{26}$O are investigated experimentally theoretically. unbound states populated in an experiment performed at the R3B-LAND setup GSI via proton-knockout reactions from ${}^{26}$F ${}^{27}$F relativistic energies around 442 414 MeV/nucleon, respectively. From kinematically complete measurement of decay into ${}^{24}$O plus one or two neutrons, ground-state energy width determined, upper limits for lifetime extracted. In addition, results...
Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure stable and exotic oxygen isotopes at ${\mathrm{R}}^{3}\mathrm{B}/\mathrm{LAND}$ setup with incident beam energies range $300--450\text{ }\mathrm{MeV}/\mathrm{u}$. The isotopic chain offers large variation separation that allows quantitative understanding single-particle strength changing isospin asymmetry. provide complementary approach to intermediate-energy one-nucleon...
A new approach to the production and detection of bound neutron clusters is presented. The technique based on breakup beams very neutron-rich nuclei subsequent recoiling proton in a liquid scintillator. method has been tested 11Li, 14Be 15B by C target. Some 6 events were observed that exhibit characteristics multineutron cluster liberated 14Be, most probably channel 10Be+4n. various backgrounds may mimic such signal are discussed detail.
Reactions of the halo systems 11Be and 11Li (at 460 280 MeV/nucleon) with a carbon target demonstrate that ( n+9Li) has an (unbound) l=0 ground state very close to threshold. The neutron appreciable (1s1/2)2 (0p1/2)2 components.Received 20 December 1994DOI:https://doi.org/10.1103/PhysRevLett.75.1719©1995 American Physical Society
The breakup of ${}^{10,12}\mathrm{Be}$ into He clusters has been studied using the ${p,}^{12}\mathrm{C}{(}^{12}\mathrm{Be}{,}^{6}\mathrm{He}{,}^{6}\mathrm{He})$ and ${}^{12}\mathrm{C}{(}^{12}\mathrm{Be}{,}^{4}\mathrm{He}{,}^{6}\mathrm{He})$ inelastic scattering two neutron transfer reactions with a 378 MeV ${}^{12}\mathrm{Be}$ beam incident on ${}^{12}\mathrm{C}$ $({\mathrm{CH}}_{2}{)}_{n}$ targets. Evidence found for three new states in ${}^{10}\mathrm{Be}$ at excitation energies 13.2,...
The first excited ${2}^{+}$ state of the unstable isotope $^{110}\mathrm{Sn}$ has been studied in safe Coulomb excitation at $2.82\text{ }\text{ }\mathrm{MeV}/u$ using MINIBALL array REX-ISOLDE post accelerator CERN. This is measurement reduced transition probability this method for a neutron deficient Sn isotope. strength approach lies excellent peak-to-background ratio that achieved. extracted probability,...
The pH dependence of proton uptake and electron transfers during the reaction between fully reduced cytochrome c oxidase oxygen has been studied using flow-flash method. Proton was monitored different indicators. We have also investigated effect D2O on electron-transfer reactions. biphasic throughout range (6.3-9.3), decrease observed rate constants at increasing could be described by titration curves with pKa values 8-8.5. Of four phases resolved in redox reaction, for first two were...