A5034994507- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Radioactive Decay and Measurement Techniques
- Advanced NMR Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Astro and Planetary Science
- Nuclear Materials and Properties
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Electron and X-Ray Spectroscopy Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Rare-earth and actinide compounds
- Graphite, nuclear technology, radiation studies
- Guidance and Control Systems
- Target Tracking and Data Fusion in Sensor Networks
- Quantum, superfluid, helium dynamics
University of Warsaw
2016-2025
Saha Institute of Nuclear Physics
2024
University of Tennessee at Knoxville
2006-2022
Joint Institute for Computational Sciences
2006-2022
Kurchatov Institute
2016
Oak Ridge Associated Universities
2009-2013
Vanderbilt University
2006-2011
Michigan State University
2009
Mississippi State University
2009
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2009
The decay of extremely neutron-deficient 45Fe has been studied in detail by means a novel type gaseous detector employing digital imaging to record tracks charged particles. two-proton radioactivity channel was clearly identified. For the first time, angular and energy correlations between two protons emitted from nuclear ground state were determined, indicating genuine three-body character this decay. half-life found be 2.6+/-0.2 ms observed 2p branching ratio is 70+/-4%.
Two new alpha emitters 109Xe and 105Te were identified through the observation of --> 101Sn alpha-decay chain. The nuclei produced in fusion-evaporation reaction 54Fe(58Ni,3n)109Xe studied using Recoil Mass Spectrometer at Holifield Radioactive Ion Beam Facility. transitions Ealpha = 4062 +/- 7 keV 3918 9 interpreted as l 2 0 from 7/2+ ground state (T1/2 13 ms) to 5/2+ a excited state, located 150 105Te. subsequent decay marks discovery lightest known alpha-decaying nucleus. measured...
The nuclear structure of $^{67}\mathrm{Co}$ has been investigated through $^{67}\mathrm{Fe}$ $\ensuremath{\beta}$ decay. isotopes were produced at the LISOL facility in proton-induced fission $^{238}\mathrm{U}$ and selected using resonant laser ionization combined with mass separation. application a new correlation technique unambiguously revealed $496(33)$ ms isomeric state an unexpected low energy 492 keV. A level scheme was deduced. Proposed spin parities suggest spherical...
The structure of neutron-rich nuclei beyond $^{78}\mathrm{Ni}$ was studied using postaccelerated radioactive beams $^{83,84,85}\mathrm{Ga}$ utilizing $\ensuremath{\beta} \ensuremath{\gamma}$ and $\ensuremath{\beta}\ensuremath{-}n spectroscopy. Our data, when combined with energy level systematics, suggests a possible new spherical subshell closure at $N=58$ is created by the nearly degenerated $\ensuremath{\nu}3{s}_{1/2}$ $\ensuremath{\nu}2{d}_{5/2}$ orbitals being well separated from other...
The neutron-rich isotopes $^{65,67}\mathrm{Fe}$ and $^{65}\mathrm{Co}$ have been produced at the LISOL facility, Louvain-La-Neuve, in proton-induced fission of $^{238}\mathrm{U}$. Beams these extracted with high selectivity by means resonant laser ionization combined mass separation. Yrast near-yrast levels also populated $^{64}\mathrm{Ni}+^{238}\mathrm{U}$ reaction Argonne National Laboratory. level structure could be investigated combining all information from both $^{65}\mathrm{Fe}$...
The β decays of neutron-rich nuclei near the doubly magic (78)Ni were studied at Holifield Radioactive Ion Beam Facility using an electromagnetic isobar separator. half-lives (82)Zn (228±10 ms), (83)Zn (117±20 and (85)Ga (93±7 ms) determined for first time. These found to be very different from predictions global model used in astrophysical simulations. A new calculation was developed density functional model, which properly reproduced experimental values. robustness region allowed us...
In the EXILL campaign a highly efficient array of high purity germanium (HPGe) detectors was operated at cold neutron beam facility PF1B Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements γ-rays following neutron-induced capture and fission reactions. The setup consisted collimation system producing pencil with thermal equivalent flux about 108 n s−1cm−2 target position negligible halo. surrounded by an eight ten anti-Compton shielded EXOGAM Clover...
The beta-delayed neutron branching ratios (P{betan}) for nuclei near doubly magic 78Ni have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital beta-gamma spectroscopy of 238U fission products. P{betan} values the very neutron-rich isotopes ;{76-78}Cu 83Ga were found to be much higher than previously reported predicted. Revised calculations betan process, accounting measurements an inversion pi2p{3/2} pi1f{5/2} orbitals, are in...
An alpha-decay branch of (1.4+/-0.4) x 10(-4) has been discovered in the decay 109I, which predominantly decays via proton emission. The measured Q(alpha) value 3918+/-21 keV allows indirect determination Q for emission from 105Sb 356+/-22 keV, is approximately 130 more bound than previously reported. This result relevant astrophysical rapid proton-capture process, would terminate 105Sn(p,gamma)106Sb(p,gamma)107Te(alpha decay)103Sn cycle at densities expected explosive hydrogen burning...
Fine structure in proton emission from the 7/2−[523] ground state and 1/2+[411] isomer deformed nucleus 141Ho was studied by means of fusion-evaporation reactions digital signal processing. Proton transitions to first excited 2+ 140Dy, with branching ratio Ipgs(2+)=0.9±0.2% Ipm(2+)=1.7±0.5%, were observed. The data are analyzed within non-adiabatic weak coupling model assuming a large quadrupole deformation daughter 140Dy as predicted self-consistent theory. Implications this result on...
Beta decay of 86Ga was studied by means β-neutron-γ spectroscopy. An isotopically pure ^{86}Ga beam produced at the Holifield Radioactive Ion Beam Facility using a resonance ionization laser ion source and high-resolution electromagnetic separation. The revealed half-life 43(-15)(+21) ms large β-delayed one-neutron two-neutron branching ratios P1n=60(10)% P2n=20(10)%. βγ populated 527 keV transition that is interpreted as deexcitation first 2+ state in N=54 isotone 86Ge suggests quick onset...
Theoretical models of β-delayed neutron emission are used as crucial inputs in r-process calculations. Benchmarking the predictions these is a challenge due to lack currently available experimental data. In this work probabilities 33 nuclides important mass regions south and south-west 132Sn presented, 16 for first time. The measurements were performed at RIKEN using Advanced Implantation Detector Array (AIDA) BRIKEN detector array. P1n values presented constrain theoretical region,...
Neutron emission probabilities and half-lives of 37 <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>β</a:mi></a:mrow></a:math>-delayed neutron emitters from <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mrow><c:mmultiscripts><c:mrow><c:mi>Ni</c:mi></c:mrow><c:mprescripts/><c:none/><c:mrow><c:mn>75</c:mn></c:mrow></c:mmultiscripts></c:mrow></c:math> to <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"...
The advanced time-delayed $\ensuremath{\gamma}\ensuremath{\gamma}(t)$ method has been applied to determine half-lives of low-lying states in the $N=50$ isotones $^{94}\mathrm{Ru}$ and $^{96}\mathrm{Pd}$. inferred experimental $E2$ strengths for ${4}^{+}\ensuremath{\rightarrow}{2}^{+}$ transitions two nuclei show a dramatic deviation with respect shell model predictions $({f}_{5/2},p,{g}_{9/2})$ proton hole space $^{100}\mathrm{Sn}$. anomalous behavior can be ascribed breakdown seniority...
Abstract The β -delayed neutron-emission probabilities of 28 exotic neutron-rich isotopes Pm, Sm, Eu, and Gd were measured for the first time at RIKEN Nishina Center using Advanced Implantation Detector Array (AIDA) BRIKEN neutron detector array. existing -decay half-life ( T 1/2 ) database was significantly increased toward more isotopes, uncertainties previously values decreased. new data not only constrain theoretical predictions half-lives probabilities, but also allow probing mechanisms...
Direct lifetime measurements via $\ensuremath{\gamma}\text{\ensuremath{-}}\ensuremath{\gamma}$ coincidences using a fast timing detector array consisting of ${\mathrm{LaBr}}_{3}(\mathrm{Ce})$ scintillators has been applied to determine the low-lying states in semimagic $(N=50)$ nucleus $^{94}\mathrm{Ru}$. The experiment was carried out as first series ``FAIR-0'' experiments with DESPEC experimental setup at Facility for Antiproton and Ion Research (FAIR). Excited $^{94}\mathrm{Ru}$ were...
The $\ensuremath{\beta}$-delayed one- and two-neutron emission probabilities (${P}_{1n}$ ${P}_{2n}$) of 20 neutron-rich nuclei with $N\ensuremath{\ge}82$ have been measured at the RIBF facility RIKEN Nishina Center. ${P}_{1n}$ $^{130,131}\mathrm{Ag}$, $^{133,134}\mathrm{Cd}$, $^{135,136}\mathrm{In}$, $^{138,139}\mathrm{Sn}$ were determined for first time, stringent upper limits placed on ${P}_{2n}$ nearly all cases. ($\ensuremath{\beta}2n$) was unambiguously identified in $^{133}\mathrm{Cd}$...
The decay properties of 133In were studied in detail at the ISOLDE Decay Station. implementation Resonance Ionization Laser Ion Source allowed separate measurements its 9/2+ ground state (133gIn) and 1/2− isomer (133mIn). With use β-delayed neutron γ spectroscopy, strengths above separation energy quantified this neutron-rich nucleus for first time. Gamow-Teller transition 9/2+→7/2+ was located 5.93 MeV 133gIn with a logft=4.7(1). In addition, several neutron-unbound states populated lower...