I. Dillmann
A5036548316- Nuclear physics research studies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Astro and Planetary Science
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Nuclear Materials and Properties
- Quantum Chromodynamics and Particle Interactions
- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Advanced Chemical Physics Studies
- Scientific Research and Discoveries
- Particle accelerators and beam dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Astronomy and Astrophysical Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radioactive contamination and transfer
University of Victoria
2016-2025
TRIUMF
2016-2025
GSI Helmholtz Centre for Heavy Ion Research
2014-2024
Justus-Liebig-Universität Gießen
2012-2024
Joint Institute for Nuclear Astrophysics
2019-2022
Technical University of Munich
2008-2021
Daresbury Laboratory
2021
Universidade de Santiago de Compostela
2020
Karlsruhe Institute of Technology
2008-2019
University of Tennessee at Knoxville
2019
This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star merger GW170817 was observed in extraordinary detail with gravitational waves and electromagnetic radiation from radio to γ rays. The very red color associated kilonova suggests that mergers are important site. Astrophysical simulations core collapse supernovae making rapid progress. Detection both electron neutrinos antineutrinos next galactic supernova will constrain composition neutrino-driven...
Neutron-induced reaction cross sections of short-lived nuclei are imperative to understand the origin heavy elements in stellar nucleosynthesis and for societal applications, but their measurement is extremely complicated due radioactivity targets involved. One way overcoming this issue combine surrogate reactions with unique possibilities offered by heavy-ion storage rings. In work, we describe first surrogate-reaction experiment inverse kinematics, which successfully conducted at...
First beta- and gamma-spectroscopic decay studies of the N=82 r-process "waiting-point" nuclide 130Cd have been performed at CERN/ISOLDE using highest achievable isotopic selectivity. Several nuclear-physics surprises discovered. The first one is unanticipatedly high energy 2.12 MeV for [pi g(9/2) multiply sign in circle nu g(7/2)] 1(+) level 130In, which fed by main Gamow-Teller transition. second surprise rather Q(beta) value 8.34 MeV, agreement only with recent mass models that include...
A small number of naturally occurring, proton-rich nuclides (the p-nuclei) cannot be made in the s- and r-processes. Their origin is not well understood. Massive stars can produce p-nuclei through photodisintegration pre-existing intermediate heavy nuclei. This so-called γ-process requires high stellar plasma temperatures occurs mainly explosive O/Ne burning during a core-collapse supernova. Although massive has been successful producing large range p-nuclei, significant deficiencies remain....
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},...
A precision mass investigation of the neutron-rich titanium isotopes $^{51\ensuremath{-}55}\mathrm{Ti}$ was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range measurements covers $N=32$ shell closure, overall uncertainties $^{52\ensuremath{-}55}\mathrm{Ti}$ values were significantly reduced. Our results conclusively establish existence weak effect $N=32$, narrowing down abrupt onset this closure. data compared with state-of-the-art ab initio model calculations...
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.
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>....
The "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" (KADoNiS) project is an online database for experimental cross sections relevant to the s process and p process. It available under http://nuclear‐astrophysics.fzk.de/kadonis consists two parts. Part 1 updated sequel previous Bao et al. compilations from 1987 2000 (n,γ) big bang s‐process nucleosynthesis. second part will be p‐process database, which expected launched winter 2005/06. KADoNiS started April 2005, a first...
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...
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 strontium, barium, carbon, and silicon isotopic compositions of 61 acid-cleaned presolar SiC grains from Murchison. Comparison with previous data shows that acid washing is highly effective in removing both strontium barium contamination. For the first time, by using correlated 88Sr/86Sr 138Ba/136Ba ratios mainstream grains, we are able to resolve effect 13C concentration 13C-pocket mass on s-process nucleosynthesis, which points toward existence large pockets low concentrations...
Abstract Nuclear astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand engines astronomical objects origin chemical elements. This white paper summarizes progress status field, new open questions that have emerged, tremendous scientific opportunities opened up with major advances in capabilities across an ever growing number disciplines subfields need be integrated. We take holistic view discussing unique challenges regards science,...
A high-resolution measurement of the neutron-induced fission cross section $^{234}\mathrm{U}$ and $^{237}\mathrm{Np}$ has been performed at CERN Neutron Time-of-Flight facility. The sections have determined in a wide energy range from 1 eV to GeV using evaluated $^{235}\mathrm{U}$ as reference. In these measurements determination for resonances could be improved, whereas previous discrepancies were confirmed. New cross-section data are provided high neutron energies that go beyond limits...
The cross section of the reaction $^{197}\mathrm{Au}$($n,\ensuremath{\gamma}$) was measured with time-of-flight technique at n_TOF (neutron time-of-flight) facility in unresolved resonance region between 5 and 400 keV using a pair ${\mathrm{C}}_{6}$D${}_{6}$ (where D denotes $^{2}\mathrm{H}$) liquid scintillators for detection prompt capture $\ensuremath{\gamma}$ rays. results total uncertainty $3.9%--6.7$$%$ resolution 20 bins per energy decade show fair agreement Evaluated Nuclear Data...
We have measured the neutron capture cross sections of stable magnesium isotopes ${}^{24,25,26}$Mg in energy range interest to $s$ process using time-of-flight facility n_TOF at CERN. Capture events from a natural metal sample and samples enriched ${}^{25}$Mg ${}^{26}$Mg were recorded total method based on C${}_{6}$${}^{2}$H${}_{6}$ detectors. Neutron resonance parameters extracted by simultaneous shape analysis present data existing transmission isotopic sample. Maxwellian-averaged for...