A5103324999- Nuclear physics research studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Nuclear reactor physics and engineering
- Quantum Chromodynamics and Particle Interactions
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Mass Spectrometry Techniques and Applications
- Atomic and Subatomic Physics Research
- Ion-surface interactions and analysis
- Particle physics theoretical and experimental studies
- Electron Spin Resonance Studies
- Muon and positron interactions and applications
- Astro and Planetary Science
- Molecular Spectroscopy and Structure
- Isotope Analysis in Ecology
- Superconducting Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- Gamma-ray bursts and supernovae
GSI Helmholtz Centre for Heavy Ion Research
2013-2025
Justus-Liebig-Universität Gießen
2005-2023
Airbus (Germany)
2017
Saitama University
2016
Technical University of Munich
2013
Institute of Modern Physics
2013
Chinese Academy of Sciences
2013
Technical University of Darmstadt
1997-2011
GANIL
2011
University of Groningen
2011
Using a new bunched-beam technique in the GSI heavy-ion experimental storage ring (ESR), we performed precision laser spectroscopy on relativistic heavy ions hitherto inaccessible infrared optical region. We determined wavelength of $M1$ transition between $F\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1$ $(\ensuremath{\tau}\ensuremath{\approx}50\mathrm{ms})$ and $F\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0$ hyperfine states $1s$ ground state hydrogenlike...
We observed the bound-state ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of fully ionized ${}^{187}$Re nuclei circulating in a storage ring. With two independent methods time dependent growth hydrogenlike ${}^{187}$Os ions has been measured and half-life $32.9\ifmmode\pm\else\textpm\fi{}2.0\mathrm{yr}$ for bare could be determined, to compared with 42 Gyr neutral atoms. resulting $\mathrm{log}\mathrm{ft}$ value $7.87\ifmmode\pm\else\textpm\fi{}0.03$ any ionization state can calculated. Thus...
Abstract Quantum electrodynamics (QED), the quantum field theory that describes interaction between light and matter, is commonly regarded as best-tested in modern physics. However, this claim mostly based on extremely precise studies performed domain of relatively low strengths atoms ions 1–6 . In realm very strong electromagnetic fields such heaviest highly charged (with nuclear charge Z ≫ 1), QED calculations enter a qualitatively different, non-perturbative regime. Yet, corresponding...
The probabilities for γ-ray and particle emission as a function of the excitation energy decaying nucleus are valuable observables constraining ingredients models that describe deexcitation nuclei near threshold. These essential in nuclear astrophysics applications. In this paper, we have first time simultaneously measured neutron <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mmultiscripts><a:mi>Pb</a:mi><a:mprescripts/><a:none/><a:mn>208</a:mn></a:mmultiscripts></a:math>....
We report the application of new elimination Rutherford elastic scattering technique for measurement proton-induced reaction cross sections utilizing stored ions decelerated to astrophysical energies. This approach results in a background reduction factor about 1 order magnitude, enabling first (p, n) section storage ring. Here, channels ^{124}Xe(p,n) and ^{124}Xe(p,γ) have been studied just above neutron threshold energy. The data provide valuable constraints Hauser-Feshbach theory...
We present direct mass measurements of the short-lived 44V, 48Mn, 41Ti and 45Cr nuclei. A novel experimental method has been used that is based on projectile fragmentation, in-flight separation relativistic heavy ions with fragment separator (FRS), isochronous operation storage ring (ESR). resolving power 110 000 (FWHM) an accuracy about (100–500) keV achieved. The impact results rp-process in X-ray burst models discussed.
A study of cooled $^{197}\mathrm{Au}$ projectile-fragmentation products has been performed with a storage ring. This enabled metastable nuclear excitations energies up to 3 MeV, and half-lives extending minutes or longer, be identified in the neutron-rich nuclides $^{183,184,186}\mathrm{Hf}$ $^{186,187}\mathrm{Ta}$. The results support prediction strongly favored isomer region near neutron number 116.
A study of neutron-rich isotopes in the A=185 region nuclear chart has uncovered long-lived (>1 s) isomers several hafnium, tantalum, tungsten, rhenium, and osmium. The was accessed via use projectile fragmentation with UNILAC-SIS accelerators at GSI. Fragmentation products 197Au were passed through fragment separator (FRS) injected into experimental storage ring (ESR), where single-ion identifications could be made. Evidence is presented for 183,184,186Hf, 186,187Ta,186W, 190,192,194Re,...
This work presents a direct measurement of the $^{96}$Ru($p, \gamma$)$^{97}$Rh cross section via novel technique using storage ring, which opens opportunities for reaction measurements on unstable nuclei. A proof-of-principle experiment was performed at ring ESR GSI in Darmstadt, where circulating $^{96}$Ru ions interacted repeatedly with hydrogen target. The between 9 and 11 MeV has been determined two independent normalization methods. As key ingredients Hauser-Feshbach calculations,...
High-precision mass measurements of proton-rich isotopes in the range 60≤Z≤84 were performed using novel technique Schottky spectrometry. Projectile fragments produced by 209Bi ions at 930A MeV separated with magnetic spectrometer FRS and stored cooled experimental storage ring (ESR). A typical resolving power 350 000 a precision 100 keV achieved region A≈200. Masses members α chains linked precise Qα values but not yet connected to known masses determined. In this way it is concluded that...
Secondary beams from fragmentation of $^{58}\mathrm{Ni}$ have been produced with energies $(200\ensuremath{-}220)A$ MeV, separated a fragment separator and injected into storage-cooler ring for half-life measurements. The relative momentum spread $\frac{\ensuremath{\Delta}p}{p}\ensuremath{\approx}1\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ (FWHM) which we achieved allowed us to resolve the ground isomeric states cooled $^{52}\mathrm{Mn}$ $^{53}\mathrm{Fe}$ nuclei in measured...
We report the first measurement of a ratio ${\ensuremath{\lambda}}_{{\ensuremath{\beta}}_{b}}/{\ensuremath{\lambda}}_{{\ensuremath{\beta}}_{c}}$ bound-state (${\ensuremath{\lambda}}_{{\ensuremath{\beta}}_{b}}$) and continuum-state $({\ensuremath{\lambda}}_{{\ensuremath{\beta}}_{c}})$ ${\ensuremath{\beta}}^{\ensuremath{-}}$-decay rates for case bare $^{207}\mathrm{Tl}^{81+}$ ions. These ions were produced at GSI fragment separator FRS by projectile fragmentation $^{208}\mathrm{Pb}$ beam....
Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the value for 208Hg (Z=80, N=128) isotope. The excess of ME=-13 265(31) keV obtained, used determine proton-neutron interaction strength in 210Pb, as a double difference atomic masses. results show dramatic variation lead isotopes when crossing N=126 neutron shell closure, thus confirming empirical predictions that this is sensitive overlap wave functions last valence neutrons and protons.
The core-excited isomer in fully-ionized 133Sb has been directly studied for the first time by applying novel technique of isochronous mass spectrometry at GSI. neutron-rich nuclides high charge states were produced projectile fission 411 MeV A 238U ions, separated flight fragment separator (FRS) and stored storage ring (ESR). measured excitation energy is 4.56(10) MeV. neutral-atom half-life known to be 17 μs. This shortest-lived with techniques. extended in-flight bare ions ESR, which due...