M.N. Harakeh
A5030153340- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Advanced NMR Techniques and Applications
- Advanced Chemical Physics Studies
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- High-Energy Particle Collisions Research
- X-ray Spectroscopy and Fluorescence Analysis
- Rare-earth and actinide compounds
- Crystallography and Radiation Phenomena
- Quantum chaos and dynamical systems
- Particle Accelerators and Free-Electron Lasers
- Inorganic Fluorides and Related Compounds
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Muon and positron interactions and applications
- Solid-state spectroscopy and crystallography
University of Groningen
2016-2025
GSI Helmholtz Centre for Heavy Ion Research
2010-2024
RIKEN
2024
Institut de Recherche sur les Lois Fondamentales de l'Univers
2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2009-2023
CEA Paris-Saclay
2023
Osaka University
1994-2021
GANIL
2009-2016
Institut National de Physique Nucléaire et de Physique des Particules
2009-2016
Centre National de la Recherche Scientifique
2009-2016
A long-standing question in nuclear physics is whether chargeless systems can exist. To our knowledge, only neutron stars represent near-pure systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron has been an ongoing quest several decades1, with a particular focus on four-neutron system called tetraneutron, resulting few indications of its existence so far2-4, leaving tetraneutron elusive six...
The strength distributions of the giant monopole resonance (GMR) have been measured in even-A Sn isotopes (A=112-124) with inelastic scattering 400-MeV alpha particles angular range 0 degrees -8.5 . We find that experimentally observed GMR energies are lower than values predicted by theoretical calculations reproduce 208Pb and 90Zr very well. From data, a value Ktau = -550 +/- 100 MeV is obtained for asymmetry term nuclear incompressibility.
The pygmy dipole resonance has been studied in the proton-magic nucleus 124Sn with (α, α'γ) coincidence method at Eα=136 MeV. comparison results of photon-scattering experiments reveals a splitting into two components different structure: one group states which is excited as well (γ, γ') reactions and higher energies only reactions. Calculations self-consistent relativistic quasiparticle time-blocking approximation phonon model are qualitative agreement experimental predict low-lying...
A collective formalism first proposed by Deal to describe isoscalar dipole excitations in electron scattering is extended include of these modes hadron scattering. Distorted-wave Born approximation calculations are performed using this $L=1$ form factor the excitation ${1}^{\ensuremath{-}}$, $T=0$ state at ${E}_{x}=7.12$ MeV ($1\ensuremath{\hbar}\ensuremath{\omega}$ character) $^{16}\mathrm{O}$ and a newly candidate for giant resonance ($3\ensuremath{\hbar}\ensuremath{\omega}$ ${E}_{x}=21.3$...
Inelastic $\ensuremath{\alpha}$ scattering experiments at 120 MeV on $^{206,208}\mathrm{Pb}$, $^{197}\mathrm{Au}$, and $^{209}\mathrm{Bi}$ reveal the existence of a new isoscalar resonance located $\ensuremath{\sim}80{A}^{\ensuremath{-}\frac{1}{3}}$ in addition to well-known $\ensuremath{\sim}63{A}^{\ensuremath{-}\frac{1}{3}}$ MeV. The angular distribution this resonance, though not inconsistent with an $E4$ assignment, is better described by $E0$ or $E2$. It would exhaust approximately...
We have investigated the isoscalar giant resonances in Sn isotopes using inelastic scattering of 386-MeV alpha-particles at extremely forward angles, including 0deg. obtained completely "background-free inelastic-scattering spectra for over angular range 0deg--9deg and up to an excitation energy 31.5 MeV. The strength distributions various multipoles were extracted by a multipole decomposition analysis based on expected respective multipoles. find that centroid energies monopole resonance...
Subjecting a physical system to extreme conditions is one of the means often used obtain better understanding and deeper insight into its organization structure. In case atomic nucleus, such approach investigate isotopes that have very different neutron-to-proton (N/Z) ratios than in stable nuclei. Light, neutron-rich exhibit most asymmetric N/Z those lying beyond limits binding, which undergo spontaneous neutron emission exist only as short-lived resonances (about 10-21 s), provide...
The cross sections of the isovector spin-dipole resonances (SDR) in Sb isotopes excited by ${(}^{3}\mathrm{He},t)$ charge-exchange reaction at 450 MeV for $0\ifmmode^\circ\else\textdegree\fi{}\ensuremath{\le}{\ensuremath{\theta}}_{t}\ensuremath{\le}1.15\ifmmode^\circ\else\textdegree\fi{}$ have been measured. results are compared with predicted sum-rule strengths related to difference neutron and proton root-mean-square radii. Within model used, radii differences (neutron-skin thicknesses)...
A concentration of electric-dipole excitations below the particle threshold, which is frequently denoted as pygmy dipole resonance, has been studied in semimagic nucleus $^{140}\mathrm{Ce}$ ($\ensuremath{\alpha}$, ${\ensuremath{\alpha}}^{\ensuremath{'}}\ensuremath{\gamma}$) experiments at ${E}_{\ensuremath{\alpha}}=136\text{ }\text{ }\mathrm{MeV}$. The technique $\ensuremath{\alpha}\mathrm{\text{\ensuremath{-}}}\ensuremath{\gamma}$ coincidence allows separation $E1$ from states other...
A study of the systematics breathing mode giant monopole resonance in isotopic chains Sn and Sm nuclei by means inelastic scattering 120 MeV alpha particles at 0\ifmmode^\circ\else\textdegree\fi{} has been performed. The obtained energy for spherical have employed to fit nuclear-compressibility parameters. data on used conjunction with already existing $^{208}\mathrm{Pb}$ $^{24}\mathrm{Mg}$ constrain various parameters contributing nuclear compressibility. compressibility matter...
The question, whether the high-quality nucleon-nucleon potentials can successfully describe three-nucleon system, and to what extent forces (3NFs) play a role, has become very important in nuclear few-body physics. One kinematic region where effects because of 3NFs show up is minimum differential cross section elastic nucleon-deuteron scattering. Another observable, which could give an indication about contribution spin 3NFs, vector analyzing power. To investigate importance systematically...
To investigate the importance of three-nucleon forces (3NF) systematically over a broad range intermediate energies, differential cross sections elastic proton-deuteron scattering have been measured at proton bombarding energies 108, 120, 135, 150, 170, and $190\phantom{\rule{0.3em}{0ex}}\text{MeV}$ c.m. angles between $30\ifmmode^\circ\else\textdegree\fi{}$ $170\ifmmode^\circ\else\textdegree\fi{}$. Comparisons with Faddeev calculations show unambiguously shortcomings employing only two-body...
The systematic behavior of the isoscalar giant dipole resonance (ISGDR) in $^{90}\mathrm{Zr}$, $^{116}\mathrm{Sn}$, $^{144}\mathrm{Sm}$, and $^{208}\mathrm{Pb}$ is studied with inelastic $\ensuremath{\alpha}$ scattering at ${E}_{\ensuremath{\alpha}}=386\phantom{\rule{0.3em}{0ex}}\mathrm{MeV}$. Multipole-decomposition analysis applied to extract excitation strengths resonances from $(\ensuremath{\alpha},{\ensuremath{\alpha}}^{\ensuremath{'}})$ differential cross sections...
It is shown via a study on $^{26}\mathrm{Mg}$ target that the ($t$,$^{3}\mathrm{He}$) reaction at 115 MeV/nucleon an accurate probe for extracting Gamow-Teller transition strengths. To do so, data are complemented by results from $^{26}\mathrm{Mg}$($^{3}\mathrm{He}$, $t$) 140 allows comparison of $T=2$ analog states excited mirror reactions. Extracted strengths $^{26}\mathrm{Mg}$($t$,$^{3}\mathrm{He}$) and compared with those $^{26}\mathrm{Mg}$($d$,$^{2}\mathrm{He}$)...