A5107170466- Nuclear physics research studies
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Radiation Detection and Scintillator Technologies
- Nuclear reactor physics and engineering
- Atomic and Molecular Physics
- Geometry and complex manifolds
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Algebraic Geometry and Number Theory
- Geometric Analysis and Curvature Flows
- Advanced Chemical Physics Studies
- Advanced NMR Techniques and Applications
- Holomorphic and Operator Theory
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Advanced Differential Geometry Research
- Particle accelerators and beam dynamics
- Advanced Numerical Analysis Techniques
- Meromorphic and Entire Functions
- Mathematics and Applications
- Gamma-ray bursts and supernovae
Imperial Valley College
2024-2025
Imperial College London
2023-2024
Technical University of Munich
2021
Heinz Maier-Leibnitz Zentrum
2021
University of Manchester
2009-2020
Aarhus University
2014-2020
University of Notre Dame
1973-2017
University of Michigan
2017
Joint Institute for Nuclear Astrophysics
2017
Stanford University
1968
Fusion excitation functions for the reactions of ${}^{124,132}$Sn with ${}^{40,48}$Ca were measured at energies near and below Coulomb barrier. Weak sub-barrier fusion enhancement accounted by coupling to first 2${}^{+}$ 3${}^{\ensuremath{-}}$ states in target projectile was observed ${}^{124,132}\text{Sn}+{}^{48}\text{Ca}$. However, ${}^{124,132}\text{Sn}+{}^{40}\text{Ca}$ cross sections are very strongly enhanced barrier this difference survives even after correcting trivial size effects....
The lifetimes of the first excited states N = 30 isotones (50)Ca and (51)Sc have been determined using Recoil Distance Doppler Shift method in combination with CLARA-PRISMA spectrometers. This is time such a applied to measure neutron-rich nuclei populated via multinucleon transfer reaction. extends lifetime knowledge beyond f_{7/2} shell closure allows us derive effective proton neutron charges fp near doubly magic nucleus (48)Ca, large-scale, shell-model calculations. These results...
The quantitative consistency of nucleon transfer reactions as a probe the occupancy valence orbits in nuclei is tested. Neutron-adding, neutron-removal, and proton-adding were measured on four stable even Ni isotopes, with particular attention to cross section determinations. data analyzed consistently terms distorted wave Born approximation yield spectroscopic factors. Valence-orbit occupancies extracted, utilizing Macfarlane-French sum rules. deduced are consistent changing number...
The clustering of $\ensuremath{\alpha}$ particles in atomic nuclei results the self-organization various geometrical arrangements at femtometer scale. one-dimensional alignment multiple is known as linear-chain structure, evidence which has been highly elusive. We show via resonant elastic and inelastic scattering a radioactive $^{10}\mathrm{Be}$ beam that excited states neutron-rich nucleus $^{14}\mathrm{C}$ agree with recent predictions structure based on an antisymmetrized molecular...
The structure of ${}^{10}$Be was studied via resonant $\ensuremath{\alpha}$-particle scattering a neutron-rich ${}^{6}$He beam. A time projection chamber, PAT-TPC, operated in an active-target mode to provide gaseous ${}^{4}$He target and trace the beam reaction products traversing its active tracking volume. This significantly lowered detection threshold at low energies. Elastic scattering, inelastic 2${}^{+}$ state, ${}^{6}$He($\ensuremath{\alpha}$, 2$n$)${}^{8}$Be were measured below...
Measurements of neutron-adding, neutron-removing, and proton-adding reactions were carried out for the four stable even Ni isotopes. Particular attention was paid to obtaining precise values cross sections at peaks angular distributions. Tests with sum rules neutron data indicate that results are self-consistent level a few tenths nucleon. Data on also obtained analyzed slightly different method---while these consistent, ambiguities larger. The occupancies orbits derived from data, proton...
Lifetimes of low-lying excited states the neutron-rich $^{44,46}\mathrm{Ar}$ nuclei, populated via multinucleon transfer reactions, are measured by means differential recoil distance Doppler shift method. The extracted electromagnetic transition probabilities compared with previous intermediate-energy Coulomb-excitation measurements and large-scale shell-model calculations. increase in deduced $B$($E2;{2}^{+}\ensuremath{\rightarrow}{0}^{+}$) probability from $^{44}\mathrm{Ar}$ to...
The valence neutron composition of the ${}^{130}$Te and ${}^{130}$Xe ground states has been studied with a view to constraining calculations nuclear matrix element for neutrinoless double-$\ensuremath{\beta}$ decay ${}^{130}$Te. Single-neutron adding removing reactions on ${}^{128,130}$Te ${}^{130,132}$Xe have used probe vacancy $0{g}_{7/2}$, $1{d}_{5/2}$, $1{d}_{3/2}$, $2{s}_{1/2}$, $0{h}_{11/2}$ orbitals. change in these orbitals, obtained through self-consistent determination...
The single-neutron properties of $N$ $=$ 51 nuclei have been studied with the ($d$,$p$) and ($\ensuremath{\alpha}$,${}^{3}$He) reactions, at beam energies 15 50 MeV respectively, on ${}^{88}$Sr, ${}^{90}$Zr, ${}^{92}$Mo targets. light reaction products were momentum analyzed using a conventional magnetic spectrometer. Additionally, ${}^{2}{\mathrm{H}(}^{86}\mathrm{Kr},p$) was measured energy 10 MeV/u, where outgoing ions helical-orbit Absolute cross sections angular distributions...
The single-neutron properties of the $N=83$ nucleus ${}^{137}$Xe have been studied using ${}^{136}$Xe($d$,$p$) reaction in inverse kinematics at a beam energy 10 MeV/u. helical-orbit spectrometer, HELIOS, Argonne National Laboratory was used to analyze outgoing protons, achieving an excitation-energy resolution \ensuremath{\sim}100 keV. Extraction absolute cross sections, angular distributions, and spectroscopic factors has led more complete understanding strength ${}^{137}$Xe. In...
Pair correlations in the ground state of $^{130}\mathrm{Te}$ have been investigated using pair-transfer experiments to explore validity approximations calculating matrix element for neutrinoless double-$\ensuremath{\beta}$ decay. This nucleus is a candidate observation such decay, and good understanding its structure crucial eventual calculations neutrino mass, should decay indeed be observed. For proton-pair adding, strong transitions excited 0${}^{+}$ states had observed Te isotopes by...
Proton pair correlations relevant for the neutrinoless double-$\ensuremath{\beta}$ decay of ${}^{76}$Ge have been probed via ${}^{74,76}$Ge(${}^{3}$He,$n$) reactions at 16 MeV. No evidence pairing vibrations in either nucleus is observed sensitivity limits $\ensuremath{\sim}$6$%$ and $\ensuremath{\sim}$19$%$ ground-state strength ${}^{76}$Se ${}^{78}$Se, respectively. These results are understanding matrix elements decay. The lack consistent with a simple BCS structure ground states...
The production of $^{26}\mathrm{Al}$ in massive stars is sensitive to the $^{23}\mathrm{Na}(\ensuremath{\alpha},p)^{26}\mathrm{Mg}$ cross section. Recent experimental data suggest currently recommended sections are underestimated by a factor $\ensuremath{\sim}40$. We present here differential for reaction measured energy range ${E}_{\mathrm{c}.\mathrm{m}.}=1.7--2.5\text{ }\text{ }\mathrm{MeV}$. Concurrent measurements Rutherford scattering provide absolute normalizations that independent...
The $(d,n)$ reaction has been studied with targets of $^{9}\mathrm{Be}, ^{11}\mathrm{B}, ^{13}\mathrm{C}, ^{14,15}\mathrm{N}$, and $^{19}\mathrm{F}$ at ${E}_{d}=16\phantom{\rule{0.16em}{0ex}}\mathrm{MeV}$ using a deuterated liquid-scintillator array. Advanced spectral unfolding techniques accurately measured scintillator response functions were employed to extract neutron energy spectra without the need for long-path time-of-flight. An analysis proton-transfer data forward angles ground...
An elastic backscattering experiment has been performed at energies below the Coulomb barrier to investigate static and dynamic effects in interaction of $^{6}\text{He}$ with $^{209}\text{Bi}$. The measured cross sections are presented terms $\mathrm{d}\ensuremath{\sigma}/\mathrm{d}{\ensuremath{\sigma}}_{Ruth}$ ratio, as a function distance closest approach on Rutherford trajectory. data compared three-body CDCC calculation good agreement is observed. In addition, critical was extracted. A...