A5032923300- 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 accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Chemical Physics Studies
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Ion-surface interactions and analysis
- Radiation Detection and Scintillator Technologies
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- Neutrino Physics Research
- Mass Spectrometry Techniques and Applications
- Astro and Planetary Science
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Nuclear Materials and Properties
- Gamma-ray bursts and supernovae
GSI Helmholtz Centre for Heavy Ion Research
2016-2025
Saha Institute of Nuclear Physics
2020-2024
Technical University of Darmstadt
2004-2024
Justus-Liebig-Universität Gießen
2000-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2022
University of Padua
2022
Goethe University Frankfurt
2022
Facility for Antiproton and Ion Research
2012-2021
Nara Women's University
2014-2019
Kurchatov Institute
2019
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,...
With a new detector setup and the high-resolution performance of fragment separator FRS at GSI we discovered 57 isotopes in atomic number range 60$\leq Z \leq 78$: \nuc{159-161}{Nb}, \nuc{160-163}{Pm}, \nuc{163-166}Sm, \nuc{167-168}{Eu}, \nuc{167-171}{Gd}, \nuc{169-171}{Tb}, \nuc{171-174}{Dy}, \nuc{173-176}{Ho}, \nuc{176-178}{Er}, \nuc{178-181}{Tm}, \nuc{183-185}{Yb}, \nuc{187-188}{Lu}, \nuc{191}{Hf}, \nuc{193-194}{Ta}, \nuc{196-197}{W}, \nuc{199-200}{Re}, \nuc{201-203}{Os},...
Proton radii of ^{12-19}C densities derived from first accurate charge changing cross section measurements at 900A MeV with a carbon target are reported. A thick neutron surface evolves ∼0.5 fm in ^{15}C to ∼1 ^{19}C. The halo radius ^{19}C is found be 6.4±0.7 as large ^{11}Li. Ab initio calculations based on chiral nucleon-nucleon and three-nucleon forces reproduce the well.
Deeply bound 1s states of pi(-) in (115,119,123)Sn were preferentially observed using the Sn(d,3He) pion-transfer reaction under recoil-free condition. The binding energies and widths precisely determined used to deduce isovector parameter s-wave pion-nucleus potential be b1=-(0.115+/-0.007)m(-1)(pi). enhancement |b(1)| over free piN value (b(free)1/b1=0.78+/-0.05) indicates a reduction chiral order parameter, f*pi(rho)2/f2pi approximately 0.64, at normal nuclear density, rho=rho(0).
We have observed the two-proton radioactivity of previously unknown (19)Mg ground state by tracking decay products in-flight. For first time, trajectories 2p-decay products, (17)Ne+p+p, been measured using microstrip detectors which allowed us to reconstruct vertices and fragment correlations. The half-life deduced from vertex distribution is 4.0(15) ps in system (19)Mg. Q value 2p inferred p-p-(17)Ne correlations 0.75(5) MeV.
The unstable neutron-deficient $^{108}\mathrm{Sn}$ isotope has been studied in inverse kinematics by intermediate-energy Coulomb excitation using the RISING/FRS experimental setup at GSI. This is highest Z nucleus so far with this method. Its reduced transition probability B (E2;0${}_{g.s.}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})$ measured for first time. extracted B($E2$) value of $0.230(57){e}^{2}\phantom{\rule{0.3em}{0ex}}{b}^{2}$ determined relative to known stable $^{112}\mathrm{Sn}$...
We report on time-modulated two-body weak decays observed in the orbital electron capture of hydrogen-like 140Pr59+ and 142Pm60+ ions coasting an ion storage ring. Using non-destructive single ion, time-resolved Schottky mass spectrometry we found that expected exponential decay is modulated time with a modulation period about 7 seconds for both systems. Tentatively this observation attributed to coherent superposition finite eigenstates neutrinos from into final state.
A search for new isotopes using in-flight fission of a 345 MeV/nucleon 238 U beam has been carried out in the commissioning experiment next-generation radioactive isotope separator BigRIPS at RI Beam Factory RIKEN Nishina Center. Two neutron-rich palladium 125 Pd and 126 were observed first time, which demonstrates great potential factory.
The N/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer GSI Schwerionen Synchrotron (SIS). Stable and radioactive Sn La beams an incident energy 600 MeV per nucleon have used in order to explore a wide range isotopic compositions. For interpretation data, calculations statistical multifragmentation model for properly chosen ensemble excited sources were performed. parameters ensemble, representing variety spectator nuclei...
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...
The first determination of radii point proton distribution (proton radii) 12–17B from charge-changing cross sections (σCC) measurements at the FRS, GSI, Darmstadt is reported. are deduced a finite-range Glauber model analysis σCC. show an increase 13B to 17B and consistent with predictions antisymmetrized molecular dynamics for neutron-rich nuclei. existence thick neutron surface neutron-proton radius difference 0.51(0.11) fm in 17B.Received 11 May...
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.
We report on the first measurement of ${\ensuremath{\beta}}^{+}$ and orbital electron-capture decay rates $^{140}\mathrm{Pr}$ nuclei with simplest electron configurations: bare nuclei, hydrogenlike, heliumlike ions. The measured constant hydrogenlike $^{140}\mathrm{Pr}^{58+}$ ions is about 50% larger than that $^{140}\mathrm{Pr}^{57+}$ Moreover, one bound faster neutral $^{140}\mathrm{Pr}^{0+}$ atoms 59 electrons. To explain this peculiar observation has to take into account conservation...
We observed well-separated 1s and 2p pi(-) states in 205Pb the 206Pb(d,3He) reaction at T(d) = 604.3 MeV. The binding energies widths determined are B(1s) 6.762+/-0.061 MeV, Gamma(1s) 0.764(+0.154)(-0.171) B(2p) 5.110+/-0.045 Gamma(2p) 0.321(-0.062)(+0.060) They used to deduce real imaginary strengths of s-wave part pion-nucleus interaction, which translates into a positive mass shift 205Pb.