T. H. Hoang
A5101991868- Nuclear physics research studies
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Radiation Therapy and Dosimetry
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- Astro and Planetary Science
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Advanced Frequency and Time Standards
- Mass Spectrometry Techniques and Applications
- Rare-earth and actinide compounds
- Radiation Detection and Scintillator Technologies
- Inorganic Fluorides and Related Compounds
- Ion-surface interactions and analysis
Duy Tan University
2024
Osaka University
2016-2022
Vietnam Academy of Science and Technology
2016-2018
Millsaps College
2014
The nuclear shell structure, which originates in the nearly independent motion of nucleons an average potential, provides important guide for our understanding structure and underlying forces. Its most remarkable fingerprint is existence so-called `magic numbers' protons neutrons associated with extra stability. Although introduction a phenomenological spin-orbit (SO) coupling force 1949 helped explain magic numbers, its origins are still open questions. Here, we present experimental...
We have measured for the first time charge-changing cross sections ($\sigma_{\text{CC}}$) of $^{12-16}$C on a $^{12}$C target at energies below $100A$ MeV. To analyze these low-energy data, we developed finite-range Glauber model with global parameter set within optical-limit approximation which is applicable to reaction section ($\sigma_{\text{R}}$) and $\sigma_{\text{CC}}$ measurements incident from 10$A$ $2100A$ Adopting proton-density distribution known electron-scattering as well bare...
Background: There is renewed interest in electric dipole strength distributions for a variety of reasons including the extraction polarizability related to properties symmetry energy and measure neutron skin thickness, understanding structure low-energy $E1$ nuclei with excess, establishing systematics isovector giant resonance (IVGDR). Inelastic proton scattering at energies few hundred MeV very forward angles ${0}^{\ensuremath{\circ}}$ has been established as tool study magnetic...
The dipole polarizability of stable even-mass tin isotopes 112,114,116,118,120,124Sn was extracted from inelastic proton scattering experiments at 295 MeV under very forward angles performed RCNP. Predictions energy density functionals cannot account for the present data and 208Pb simultaneously. evolution polarizabilities in neighboring indicates a kink 120Sn while all model results show nearly linear increase with mass number after inclusion pairing corrections.
In this work we look at the low-lying nuclear structure properties of several $N=Z$ nuclei residing between doubly magic ${}^{40}$Ca and ${}^{100}$Sn. Using large shell model codes, calculate discuss systematics energies. We show energy levels, $B(E2)$'s, static quadrupole moments, $g$ factors these nuclei. all cases, compare results two different interactions which yield significantly occupation numbers. our with those rotational vibrational models. By examining $B(E2)$'s make associations...
Background: Stellar carbon synthesis occurs exclusively via the 3α process, in which three α particles fuse to form C12 excited Hoyle state, followed by electromagnetic decay ground state. The state is above threshold, and rate of stellar production depends on radiative width this cannot be measured directly, must instead deduced combining separately quantities. One these quantities E0 branching ratio current 10% uncertainty stems mainly from ratio. process an important input parameter...
The E0 transition depopulating the first-excited 0+ state in 24Mg has been observed for first time, and strength determined by electron-positron pair γ-ray spectroscopy measurements performed using Super-e spectrometer. is ρ2×103=380(70). A two-state mixing model implies a deformation of β2≈1 change mean-square charge radius Δ〈r2〉≈1.9fm2, which suggests significant shape between ground 24Mg. gives direct evidence coexistence superdeformation 24Mg, bringing this nucleus into line with similar...
The electric monopole (E0) transition strength ρ^{2} for the connecting third 0^{+} level, a "superdeformed" band head, to "spherical" ground state in doubly magic ^{40}Ca is determined via e^{+}e^{-} pair-conversion spectroscopy. measured value ρ^{2}(E0;0_{3}^{+}→0_{1}^{+})=2.3(5)×10^{-3} smallest ρ^{2}(E0;0^{+}→0^{+}) found A<50 nuclei. In contrast, E0 observed from second state, head of "normal" deformation, an order magnitude larger ρ^{2}(E0;0_{2}^{+}→0_{1}^{+})=25.9(16)×10^{-3}, which...
Background: Inelastic neutrino-nucleus scattering is important for understanding core-collapse supernovae and the detection of emitted neutrinos from such events in earth-based detectors. Direct measurement cross sections difficult has only been performed on a few nuclei. It is, therefore, to develop indirect techniques which inelastic can be determined.Purpose: This paper presents development...
Electric monopole ( E 0) transitions are a highly sensitive probe of the charge distribution an atomic nucleus. A large 0 transition strength ρ 2 0)) is clear indicator nuclear shape coexistence. In region between doubly magic 40 Ca and 56 Ni, have never been observed in Ti or Cr isotopes, nor heavier iron isotopes 56,58 Fe). We performed first measurements 52 via conversion-electron pair-conversion spectroscopy using Super-e spectrometer at Australian National University Heavy Ion...
Background: Superdeformed (SD) bands are suggested by theory around $^{40}\mathrm{Ca}$ and in lighter alpha-conjugate nuclei such as $^{24}\mathrm{Mg}$, $^{28}\mathrm{Si}$, $^{32}\mathrm{S}$. Such predictions originate from a number of theoretical models including mean-field antisymmetrized molecular dynamics (AMD) calculations. While SD have been identified its near neighbors, evidence their existence the lighter, midshell is circumstantial at best. The key superdeformation would be...
We performed experiments to study the low-energy part of E1 response (Pygmy Dipole Resonance) in 90,94Zr nuclei, by measuring (p,p'γ) and (α,α'γ) inelastic scattering reactions at energies Ebeam,p = 80 MeV Ebeam,α 130 respectively. The inelastically scattered particles were measured employing high-resolution spectrometer Grand Raiden. gamma-rays emitted following de-excitation Zr target nuclei detected using both clover type HPGe detectors CAGRA array large volume LaBr3:Ce scintillation from...
Background: $^{24}\mathrm{Mg}$ is a strongly deformed nucleus in the ground state. Deformation effects can be observed structure of isoscalar giant monopole and quadrupole resonances. also that well known to present different types cluster-oscillation modes. Both resonances cluster states are populated by transitions.Purpose: To extract $E0$, $E1$, $E2$ transition strengths via $^{6}\mathrm{Li}$ scattering. The probe powerful tool for investigating nuclear response with very favorable ratio...
Inelastic $^{6}\mathrm{Li}$ scattering at 100 MeV/u on $^{12}\mathrm{C}$ and $^{93}\mathrm{Nb}$ has been measured with the high-resolution magnetic spectrometer Grand Raiden. The magnetic-rigidity settings of covered excitation energies from 10 to 40 MeV angles in range ${0}^{\ensuremath{\circ}}<{\ensuremath{\theta}}_{\text{lab.}}<{2}^{\ensuremath{\circ}}$. isoscalar giant monopole resonance was selectively excited present data. Measurements free instrumental background very favorable...
Charge Changing Cross Sections (CCCS or σCC) of neutron-rich carbon isotopes on target were measured at low energy (50A MeV) for the first time. The consistency between Glauber calculation and experimental σCC 12C isotope region shows that proton distribution radii can be derived from CCCS energy.
Stellar carbon synthesis occurs exclusively via the $3\alpha$ process, in which three $\alpha$ particles fuse to form $^{12}$C excited Hoyle state, followed by electromagnetic decay ground state. The state is above threshold, and rate of stellar production depends on radiative width this cannot be measured directly, must instead deduced combining separately quantities. One these quantities $E0$ branching ratio current $10$\% uncertainty stems mainly from ratio. was a series pair conversion...