A5019316470- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Nuclear physics research studies
- Distributed and Parallel Computing Systems
- Black Holes and Theoretical Physics
- Astrophysics and Cosmic Phenomena
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Advanced Data Storage Technologies
- Medical Imaging Techniques and Applications
- Advanced NMR Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Astronomical and nuclear sciences
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- X-ray Spectroscopy and Fluorescence Analysis
- advanced mathematical theories
Simon Fraser University
2016-2025
TRIUMF
2013-2025
AGH University of Krakow
2015-2024
Jagiellonian University
2011-2024
A. Alikhanyan National Laboratory
2024
SR Research (Canada)
2024
Federación Española de Enfermedades Raras
2024
Atlas Scientific (United States)
2024
The University of Adelaide
2014-2023
Northern Illinois University
2023
Cross sections for the reactions $^{55}\mathrm{Mn}$(n,p), $^{56}\mathrm{Fe}$(n,p), and $^{58}\mathrm{Ni}$(n,p) have been measured at an incident energy of 198 MeV, with protons observed over a range energies corresponding to excitations up about 35 meV in residual nuclei $^{55}\mathrm{Cr}$, $^{56}\mathrm{Mn}$, $^{58}\mathrm{Co}$, respectively. Measurements were carried out center-of-mass angles between 1.6\ifmmode^\circ\else\textdegree\fi{} 19.9\ifmmode^\circ\else\textdegree\fi{}. A...
Angular distributions of the $^{54}\mathrm{Fe}$(p,n${)}^{54}$Co and $^{54}\mathrm{Fe}$(n,p${)}^{54}$Mn cross sections have been measured to test Gamow-Teller sum rule [${S}_{\mathrm{\ensuremath{-}}}$-${S}_{+}$=3(N-Z)] in a case where strength is large for both channels. The results ${S}_{\mathrm{\ensuremath{-}}}$ ${S}_{+}$ are compared several models which moderate success describing data. Large scale shell-model quasiparticle random-phase-approximation calculations correctly predict...
Measurements of the (n,p) reaction cross section on $^{60,62,64}\mathrm{Ni}$ have been made at 198 MeV for ${\mathrm{\ensuremath{\theta}}}_{\mathrm{lab}}$=0--20\ifmmode^\circ\else\textdegree\fi{} in 4\ifmmode^\circ\else\textdegree\fi{} steps. Multipole analyses performed resulting spectra and Gamow-Teller (GT) strength distributions obtained. These GT found to occur as strong peaks low excitation energy final Co nuclei extend weakly upwards 30 excitation. Comparisons data with renormalized...
The (n,p) reaction has been studied on the nuclei $^{51}\mathrm{V}$ and $^{59}\mathrm{Co}$ at an energy of 198 MeV. Spectra were measured laboratory angles 0\ifmmode^\circ\else\textdegree\fi{}, 4\ifmmode^\circ\else\textdegree\fi{}, 8\ifmmode^\circ\else\textdegree\fi{}, 12\ifmmode^\circ\else\textdegree\fi{}, 16\ifmmode^\circ\else\textdegree\fi{}, 20\ifmmode^\circ\else\textdegree\fi{} up to excitation 35 MeV in final $^{51}\mathrm{Ti}$ $^{59}\mathrm{Fe}$. A multipole analysis data 30 was...
Gamow-Teller (GT) strength has been extracted from cross sections for the reaction $^{54}\mathrm{Fe}$(n,p${)\mathrm{}}^{54}$Mn at 0\ifmmode^\circ\else\textdegree\fi{}, 2.5\ifmmode^\circ\else\textdegree\fi{}, 5\ifmmode^\circ\else\textdegree\fi{}, 8\ifmmode^\circ\else\textdegree\fi{}, and 12\ifmmode^\circ\else\textdegree\fi{}, an incident energy of 298 MeV. This determination ${\ensuremath{\beta}}^{+}$ GT ${S}_{+}$ allows first time a full test Ikeda sum rule. These data also show that best...
We measured the analyzing power A out to ${\mathit{P}}_{\mathrm{\ensuremath{\perp}}}^{2}$=7.1 (GeV/c${)}^{2}$ with high precision by scattering a 24-GeV/c unpolarized proton beam from new University of Michigan polarized target; target's 1-W cooling allowed intensity more than 2\ifmmode\times\else\texttimes\fi{}${10}^{11}$ protons per pulse. This together unexpectedly average target polarization about 85% unusually accurate measurements at large...
The tensor analyzing power ${T}_{20}$ for the radiative capture reaction $^{1}\mathrm{H}({d}_{\mathrm{pol}}, \ensuremath{\gamma})^{3}\mathrm{He}$ has been measured in order to test new three-body wave functions. This observable arises from $D$ state of $^{3}\mathrm{He}$. An effective two-body direct-capture calculation, which was previously shown fit ${a}_{2}$ coefficient a Legendre-polynomial expansion differential cross section, is found give good description present data. A value...
The $^{70,72}\mathrm{Ge}$(n,p${)}^{70,72}$Ga reactions have been measured at a beam energy of 200 MeV in order to study the behavior Gamow-Teller (GT) strength near N=40 subshell closure. GT quenching factor extracted for $^{70}\mathrm{Ge}$ is consistent with results $^{54}\mathrm{Fe}$ and calculations done on quasiparticle random-phase-approximation model if they are renormalized by about 0.6. random-phase approximation predicts drastic reduction concentrated from $^{72}\mathrm{Ge}$ which...
Cross sections have been measured up to 35 MeV excitation for the ${}^{76}$Se($n,p$)${}^{76}$As reaction at five laboratory angles between $0\ifmmode^\circ\else\textdegree\fi{}$ and $15\ifmmode^\circ\else\textdegree\fi{}$. The incident neutron energy was 198 MeV. distribution of Gamow-Teller (GT) strength energies less than 10 deduced by carrying out a multipole decomposition data. GT below 6 found be 0.9 units, in qualitative agreement with quasiparticle random-phase approximation...
We report the observation of a large asymmetry in elastic scattering 100 MeV ${\mathrm{\ensuremath{\pi}}}^{+}$ from polarized $^{3}\mathrm{He}$ target. Measurements have been made at laboratory angles 60\ifmmode^\circ\else\textdegree\fi{}, 80\ifmmode^\circ\else\textdegree\fi{}, and 100\ifmmode^\circ\else\textdegree\fi{}, with largest value ${\mathit{A}}_{\mathit{y}}$=0.89\ifmmode\pm\else\textpm\fi{}0.12 occurring near cross-section minimum. This is observed to date pion spin-1/2 nucleus. The...
A search for deeply bound ${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ states in heavy nuclei was undertaken using the pion-transfer $^{208}\mathrm{Pb}$(n,p) reaction at TRIUMF CHARGEX facility. Monoenergetic 418-MeV neutrons from $^{7}\mathrm{Li}$(p,n) were used to induce (n,p) reactions on a segmented $^{208}\mathrm{Pb}$ target. The spectrum between 100- and 180-MeV excitation energy measured with an resolution of 1.15 MeV (FWHM). In region 120--140 MeV, where pionic expected,...
Cross sections, analyzing powers and spin-flip probabilities have been measured for inclusive inelastic scattering of 290 MeV protons from $^{54}\mathrm{Fe}$ at laboratory angles between 3.1\ifmmode^\circ\else\textdegree\fi{} 20\ifmmode^\circ\else\textdegree\fi{}. The momentum transfers vary small values (q\ensuremath{\sim}0.2 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}1}$) where individual giant resonances low multipolarity are observed, to larger (q\ensuremath{\sim}1.4 quasielastic dominates....
Doubly differential cross sections of the reaction 90Zr(n,p)90Y have been measured at 198 MeV for excitations up to 38 in residual nucleus. An overall resolution 1.3 was achieved. The spectra show qualitative agreement shape and magnitude with recent random phase approximation calculations; however, all calculations underestimate high excitation region spectra. A multipole decomposition data has performed using calculated distorted-wave impulse approximation. estimate Gamow-Teller strength...
Cross sections and analyzing powers for $^{24}\mathrm{Mg}$ at 250 MeV $^{28}\mathrm{Si}$ 200 MeV, cross 400 are presented elastic scattering inelastic to the low-lying ${2}^{+}$ state in each nucleus. The data compared ``consistent'' microscopic distorted-wave impulse approximation calculations both relativistic nonrelativistic models. here give a good description of data. For comparison, also previously published on $^{12}\mathrm{C}$ 200, 250, MeV.
Cross sections and a complete set of seven independent spin observables have been measured for inclusive quasielastic scattering 290-MeV protons from $^{54}\mathrm{Fe}$ at quasifree momentum transfer 1.36 ${\mathrm{fm}}^{\ensuremath{-}1}$ energy transfers varying 0-90 MeV. Comparison the results with relativistic nonrelativistic impulse-approximation models shows that Fermi-motion averaging, realistic nuclear response function, medium modifications $\mathrm{NN}$ interaction are essential...
At 200, 300, and 400 MeV bombarding energies, we measured cross section angular distributions for the $^{7}\mathrm{Li}$(p,n${)}^{7}$Be(g.s.+0.43 MeV) reaction 0\ifmmode^\circ\else\textdegree\fi{} sections $^{12}\mathrm{C}$(p,n${)}^{12}$N(g.s.) reaction. Systematics of these reactions are presented. The center-of-mass reaction, when plotted as a function momentum transfer, is nearly independent energy. laboratory this at in energy range from 60 to also energy, having constant value, within...