M. Pomorski
A5062647052- Nuclear physics research studies
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Neutrino Physics Research
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Quantum, superfluid, helium dynamics
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- NMR spectroscopy and applications
- Mass Spectrometry Techniques and Applications
- Medical Imaging Techniques and Applications
- Particle accelerators and beam dynamics
- Scientific Research and Discoveries
- X-ray Spectroscopy and Fluorescence Analysis
University of Warsaw
2014-2025
Laboratoire de Physique des deux infinis Bordeaux
2023
Centre National de la Recherche Scientifique
2023
Université de Bordeaux
2023
Warsaw University of Technology
2009
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},...
Results of decay spectroscopy on nuclei in vicinity the doubly magic 48Ni are presented. The measurements were performed with a Time Projection Chamber optical readout which records tracks ions and protons gaseous volume. Six decays including four events two-proton ground-state radioactivity recorded. An advanced reconstruction procedure yielded 2p energy for Q2p = 1.29(4) MeV. In addition, spectra \b{eta}-delayed emitted 44Cr 46Fe, as well half-lives branching ratios determined. results...
The decay of the extremely neutron-deficient $^{48}\mathrm{Ni}$ was studied by means an imaging time-projection chamber, which allowed recording tracks charged particles. decays six atoms were observed. Four them clearly correspond to two-proton radioactivity, providing first direct evidence for this mode in $^{48}\mathrm{Ni}$. Two represent $\ensuremath{\beta}$-delayed proton emission. half-life is determined be ${T}_{1/2}=2.{1}_{\ensuremath{-}0.4}^{+1.4}$ ms.
Properties of praseodymium and cerium doped Lutetium Aluminum Garnet (LuAG) were compared with Oxyorthosilicate (LSO) Lanthanum Bromide (LaBr <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> ). Light yield, its non-proportionality relative to 662 keV gamma -rays the dependence energy resolution on detected measured. LuAG:Pr turned out have good proportionality, deviation from unity around 10% at 16.6 3% 59.5 keV. This, together relatively...
The rare $\ensuremath{\beta}$-decay channel of $^{6}\mathrm{He}$ into the $\ensuremath{\alpha}+d$ continuum was investigated at REX-ISOLDE facility. Bunches postaccelerated ions were implanted optical time projection chamber (OTPC), where decays with emission charged particles recorded. This novel technique allowed us to extend low-energy end spectrum down 150 keV in center mass, corresponding a deuteron energy 100 keV. branching ratio for this process amounts...
The ${\ensuremath{\beta}}^{+}$ decay of very neutron-deficient $^{43}\mathrm{Cr}$ was studied by means an imaging time projection chamber that allowed recording tracks charged particles. Events $\ensuremath{\beta}$-delayed emission one, two, and three protons were clearly identified. absolute branching ratios for these channels determined to be ($81\ifmmode\pm\else\textpm\fi{}4$)%, ($7.1\ifmmode\pm\else\textpm\fi{}0.4$)%, ($0.08\ifmmode\pm\else\textpm\fi{}0.03$)%, respectively. is thus...
Isomeric ratios have been determined for 23 metastable states identified in $A\ensuremath{\approx}200$ nuclei from Pt to Rn near the valley of stability following fragmentation ${}^{238}$U. This includes high-spin with angular momenta ranging (39/2)$\ensuremath{\hbar}$ 25$\ensuremath{\hbar}$. The experimental results are discussed together those similar experiments performed this mass region. compared theoretical predictions where momentum fragment arises purely due nucleons removed...
The proton-unbound argon and chlorine isotopes have been studied by measuring trajectories of their decay-in-flight products using a tracking technique with microstrip detectors. proton (1p) two-proton (2p) emission processes detected in the measured angular correlations “heavy-fragment”+p “heavy-fragment”+p+p, respectively. ground states previously unknown Cl30 Cl28 observed for first time, providing 1p-separation energies Sp −0.48(2) −1.60(8), MeV, relevant systematics 1p- 2p-separation...
Several states of proton-unbound isotopes $^{30}\mathrm{Ar}$ and $^{29}\mathrm{Cl}$ were investigated by measuring their in-flight decay products, $^{28}\mathrm{S}$ + proton proton, respectively. A refined analysis $^{28}\mathrm{S}$-proton angular correlations indicates that the ground state is located at $2.{45}_{\ensuremath{-}0.10}^{+0.05}$ MeV above two-proton emission threshold. The investigation mechanism demonstrates it has transition dynamics. In ``transitional'' region, correlation...
In an experiment at the A1900 spectrometer of National Superconducting Cyclotron Laboratory Michigan State University new isotope Ge59 was identified and cross section for production most neutron-deficient Ge59−62 isotopes in fragmentation a Kr78 beam 150 MeV/nucleon measured. This experimental information is relevant hunt two-proton emitters region above doubly-magic Ni48.Received 16 June 2015DOI:https://doi.org/10.1103/PhysRevC.92.014622©2015 American Physical Society
In May 1911 Ernest Rutherford published a paper The Scattering of α-and β-particles by Matter and the Structure Atom.Now it is usually considered to be birth certificate atomic nucleus.Rutherford's results are presented discussed in wider context physics views that time.
The photon spectrum accompanying the orbital $K$-electron capture in first-forbidden unique decay of $^{81}\mathrm{Kr}$ was measured. total radiation intensity for energies larger than 50 keV found to be $1.42(22)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ per $K$ capture. Both shape and its relative ordinary, nonradiative rate are compared theoretical predictions. best agreement is recently developed model that employs length gauge electromagnetic field.
Monoisotopic samples of exotic, neutron-rich $^{117}\mathrm{Rh}$ nuclei, produced in the proton-induced fission $^{238}\mathrm{U}$ and separated using IGISOL mass separator coupled to JYFLTRAP Penning trap, were used perform $\ensuremath{\beta}$ $\ensuremath{\gamma}$ coincidence spectroscopy $^{117}\mathrm{Pd}$. The spin parity ground state $^{117}\mathrm{Pd}$ was determined be $1/{2}^{+}$ 19.1 ms isomer at 203.2 keV assigned a spin-parity $7/{2}^{\ensuremath{-}}$....
Excited levels in $^{87}\mathrm{Br}$, populated $\ensuremath{\beta}$ decay of $^{87}\mathrm{Se}$, have been studied by means $\ensuremath{\gamma}$-ray spectroscopy using an array broad energy Ge detectors. $^{87}\mathrm{Se}$ nuclei were produced irradiating a natural Th target with 25-MeV protons. Fission products extracted from the chamber IGISOL technique, then separated on dipole magnet and Penning trap (JYFLTRAP) setup. The scheme excited $^{87}\mathrm{Br}$ has significantly extended....
The article describes the commissioning and technical development of Weak Interaction Studies with 32Ar Decay (WISArD) experiment, installed at radioactive ion-beam facility ISOLDE/CERN. experiment aims to extend present limits on scalar tensor currents in weak interaction hence search for physics beyond Standard Model. evaluation these relies measuring proton energy beta-delayed emission, sensitive both beta-neutrino angular correlation coefficient aβν Fierz interference term b. method...
Monoisotopic samples of $^{107}\mathrm{Nb}$ nuclei, produced in the proton-induced fission $^{238}\mathrm{U}$ and separated using IGISOL mass separator coupled to a Penning trap, were used perform $\ensuremath{\beta}$- $\ensuremath{\gamma}$-coincidence spectroscopy $^{107}\mathrm{Mo}$. Gamma transitions excited levels $^{107}\mathrm{Mo}$ observed $\ensuremath{\beta}$ decay for first time. Spin parity $1/{2}^{+}$ ground state is proposed, replace previous $5/{2}^{+}$ assignment. The...
The $\ensuremath{\beta}$ decay of $^{57}\mathrm{Zn}$ and $^{58}\mathrm{Zn}$ was investigated in an experiment at the National Superconducting Cyclotron Laboratory Michigan State University. For first time $\ensuremath{\beta}$-delayed proton emission from observed with a branching ratio 0.7(1)%. proton-energy spectrum allowed for probing Gamow-Teller strength distribution above proton-separation energy daughter nucleus. Moreover, absolute ration delayed-proton found to be compatible 100%.
Recently there has been an increased interest to apply the sensitive β-decay asymmetry detected nuclear magnetic resonance (β-NMR) technique biological studies. A liquid-sample β-NMR setup was build at ISOLDE allow such investigations and use resolution gain of liquid-state NMR in physics. As part this a field locking system, set printed circuit board shimming coils, sample exchange compact β-detectors custom experimental vacuum chamber were developed. The main stabilized down ppm level by...
We determine for the first time magnetic dipole moment of a short-lived nucleus with part-per-million (ppm) accuracy. To achieve this two orders magnitude improvement over previous studies, we implement number innovations into our $\beta$-detected Nuclear Magnetic Resonance ($\beta$-NMR) setup at ISOLDE/CERN. Using liquid samples as hosts obtain narrow, sub-kHz linewidth, resonances, while simultaneous in-situ $^1$H NMR measurement allows us to calibrate and stabilize field ppm precision,...
We report on the observation of previously-unknown isotope $^{21}$Al, first unbound aluminum located beyond proton dripline. The $^{21}$Al nucleus decays by one-proton (1p) emission, and its in-flight were detected tracking trajectories all decay products with micro-strip silicon detectors. 1p-emission processes studied analyses measured angular correlations $^{20}$Mg+p. 1p-decay energies ground low-lying excited states mass excess separation energy value $S_p$=$-1.1(1)$ MeV determined.
The <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mi>β</a:mi></a:math> decay of one-neutron halo nucleus <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mmultiscripts><b:mi>Be</b:mi><b:mprescripts/><b:none/><b:mn>11</b:mn></b:mmultiscripts></b:math> was investigated using the Warsaw Optical Time Projection Chamber (OTPC) detector to measure <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mi>β</c:mi></c:math>-delayed charged particles. results two experiments are...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation M. Bowry, Zs. Podolyák, J. Kurcewicz, S. Pietri, Bunce, P. H. Regan, F. Farinon, Geissel, C. Nociforo, A. Prochazka, Weick, Allegro, Benlliure, G. Benzoni, Boutachkov, Gerl, Gorska, Gottardo, N. Gregor, R. Janik, Knöbel, I. Kojouharov, T. Kubo, Y. Litvinov, E. Merchan, Mukha, Naqvi, B. Pfeiffer, Pfützner, W....
Low-spin, excited states of the $^{89}\mathrm{Br}$ nucleus, populated in ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay $^{89}\mathrm{Se}$ have been studied for first time. The nuclei were produced proton-induced fission natural thorium using IGISOL facility and separated a dipole magnet coupled JYFLTRAP Penning trap. Gamma radiation following was measured with an array high-resolution germanium detectors. Levels scheme extended by 12 new levels 31 $\ensuremath{\gamma}$ transitions....