D.V. Kamanin, Yu.V. Pyatkov, Z.I. Goryainova, E.A. Kuznetsova, Yu. M. Sereda, A.N. Solodov, O.V. Strekalovsky, V.E. Zhuchko, A.O. Zhukova , Th. Vilane
In a long series of experiments, in different settings, we have observed the Coulomb induced break-up of the fission fragments (FFs) in the solid foils [1, 2]. The break-up occurs with a delay after the initial binary fission event of the...
We use the continuum discretized coupled channel method to study in detail the similarities and differences between neutron and proton, total, nuclear and Coulomb breakup cross sections in the breakups reaction of 8B>7Be+P and 8Be>7Be+n with the difference target masses (12C, 28Si, 58Ni, 181Ta, 208Pb and 238U). Our preliminary results reveals that neutron halo breakup cross sections are larger...
Intentionally incorporating foreign atoms in semiconductors to realise new and/or novel functionalities gives rise to structural changes that profoundly affect their electronic, magnetic and optical properties. Consequently, information on material properties and dynamic processes such as dopant diffusion and relaxation processes are necessary and can be determined using various techniques. A...
By studying the total fusion and breakup cross-sections in the interaction of the neutron-halo 11Be projectile on the lead target 208Pb, it is shown that, even for the neutron-halo projectile, the breakup channel remains the most dominant reaction channel at sub-barrier energies, following a characteristic behavior that was also previously verified for the case of the proton-halo projectile...
We discuss the effect of weakly bound projectiles' breakup (BU) channels on complete and total fusion. For that, we report our fusion method based on the Wong formula, which allows for comparing reduced experimental data to the universal fusion function to find the effect of the BU channel on fusion. We report a recent improvement to the Wong formula to upgrade our reduction method and...
Due to its negative impact on semiconductor devices, iron (Fe) is one of the most
thoroughly investigated impurities in silicon. It is a usual unintended impurity in
silicon manufacturing, functioning as a fast diffuser and severely lowering carrier
lifetimes, especially harmful for solar cells applications [1]. It is still unclear how
defects or other impurities interact with...
Although the $^9\mathrm{Be}$ $|$ $^9\mathrm{B}$ isospin doublet has been studied along many years, the observation and prediction of the first 1/2+ state in $^9\mathrm{B}$ remains inconclusive. Different reactions have been used, where the experimental values oscillate between 0.80 to 1.90 MeV.
An experiment was proposed to measure the charge exchange reaction of...
In this study, the energy spectra and yields of various ternary and quaternary particles produced during the spontaneous fission of ²⁵²Cf were measured and analyzed. Particles with atomic numbers Z = 1 to 6 were clearly identified, including hydrogen and helium isotopes such as ¹H, ²H, ³H, ⁴He, ⁶He, and ⁸He. Distinct energy distributions were observed for each particle type, and Gaussian...
A particle detector array designed for light-charged particles, known as the CsI-bowl, was built for exit channel selection for in-beam gamma-ray spectroscopy experiments. This device is composed of 64 CsI(Tl) detectors, organized in a structure reminiscent of a tea-bowl. High quantum efficiency photodiodes, characterized by their minimal mass, were employed to collect scintillation light. Its...
When attempting to extract resonance parameters from the energy-dependent cross-section data, one must fit the data at scattering (real) energies -physical sheet of the Riemann surface- afterwards then perform an analytic continuation to the unphysical sheet where the resonances are located.
When we are dealing with a multi-channel problem that consists of charged particles, the...
The effect of the entrance nuclear reaction channel was investigated from the perspective of the excited level population in the compound nucleus. A detailed comparison between analog reaction channels that are supposed to form the same compound nucleus was explained. Results showed that nuclei have a long-term "memory" of the entrance channel than expected by the usual model assumption. The...
Nuclear Excitation by Electron Capture (NEEC) was predicted by Goldanskii and Namiot as the inverse process of internal conversion in 1976[1]. It was expected to play an important role in the isomer depletion, which is a potential path for releasing nuclei energy stored in isomer[2].
The first experimental observation on NEEC was reported in the slowing down process of $^{93}$Mo[3]. The...
Nowadays multinucleon transfer reactions (MNT) are considered as an alternative approach to produce and investigate of new nuclei, including far from the line of stability. The formation of new neutron-rich nuclei in the region of heavy and superheavy nuclei is of particular interest. The use of uranium as a target in the reactions with heavy ions is one of available methods for the production...
Since the pioneering work of nuclear chirality by Frauendorf and Meng in 1997 [1], candidate chiral doublet bands in more than 50 nuclei have been reported [2]. Based on the microscopic relativistic density functional theory, the phenomenon of multiple chiral doublets (M$\chi$D) was predicted [3]. The observation of M$\chi$D bands with octupole correlations in $^{78}$Br further shows nuclear...
The structure of a nucleus can be inferred from its decay patterns and the partial decay widths of excited states leading to the ground state. A standard method of in-beam γ-ray spectroscopy at charged particle accelerators relies on γ-γ coincidences, often correlated with the charged particles or neutrons produced in the same reaction. In charge-particle-induced reactions, J = 1 states are...
Auger electron (AE) radiopharmaceutical therapy or Targeted Auger Therapy (TAET) may have the same therapeutic efficacy as alpha-particles for oncologic small disease, with lower risks of normal-tissue toxicity. The seeds of using AE emitters for RPT were planted several decades ago yet it is no anywhere near clinical use. The furthest is probably Tb-161 [1] which a combination of beta...
Prof. Ting-Ting Sun
I will talk the recent development of the Green’s function method in the RMF and RHB theory both in spherical and axially deformed cases, as well as the applications for the study of single-particle resonant states, pseudospin symmetries, halo and deformed halo in exotic nucle.
For many years, the first excited 0+ bands of well-deformed nuclei were understood as “β -vibrations”, following the seminal works of Bohr and Mottelson [1, 2]. Nevertheless, over the years it has become apparent that low-lying 0+ bands could also arise due to other effects such as shape-coexistence, and quadrupole pairing [3, 4, 5].
In this work, I will present a comprehensive dataset...
In$_x$Ga$_{1-x}$N is a highly versatile material with tunable properties, widely used in modern optoelectronics$^{1-3}$. Doping it with iron (Fe) introduces new possibilities for tailoring its properties, potentially enabling advancements in electronics, optoelectronics, and spintronics. In this study, $^{57}$Fe emission Mössbauer Spectroscopy (eMS) was used to probe the lattice site, charge...
In this presentation a brief review is made of the two main accelerator facilities that participate in the experimental nuclear physics program at IFUNAM in Mexico.
I will briefly describe our participation in the study of the unbound di-nucleon systems (2n and 2He) using traditional coincidence methods.
The use of the activation with charged particles followed by AMS (AFAMS) to study...
Nhlakanipho M. Mantengu, Hesham A.A. Abdelbagi, Sifiso S. Ntshangase
In nuclear fuels, thin film diffusion barriers are necessary to prevent the release of radioactive waste products. The combination of chemically stable silicon carbide (SiC) and silicon oxide (SiO2) layers was considered to be beneficial in preventing the release of silver from TRISO particle fuel, at normal reactor...
The results of experiments on studying nucleon and cluster transfer processes in the reactions of the 6Li (68 MeV) ions with the 9Be target nuclei are presented. The angular distributions for the reaction channels 9Be(6Li,6Li)9Be, 9Be(6Li,7Li)8Be, 9Be(6Li,8Li)7Be, Be(6Li,α)11Bg.s., s. have been measured. To describe the possible contributions of sequential transfer of nucleons and alpha...
Center for Exotic Nuclear Study in the Institute of Basic Science was recently founded to study fundamental questions in astrophysics and nuclear physics through investigations of radioactive atomic nuclei. The center is composed of four groups: experimental nuclear structure, experimental nuclear reaction, experimental nuclear astrophysics, and nuclear theory.
In the experimental groups,...
Formation mechanism of ternary fission fragments in the spontaneous ternary fission of 252Cf is described in the framework of trinuclear system model. It is shown that the fission barrier dynamically changes during the evolution of trinuclear system and during the motion of third nucleus in the decay mode. Competition between binary fission and the formation of a trinuclear system, which is...
Studies in heavy-ion induced fusion-fission process has established itself
as one of the major branches of low and medium energy nuclear structure
and reaction physics. A plethora of dynamical processes manifest through
the fusion-fission of two atomic nuclei over a wide range of projectile energy.
The process of fission followed by fusion of two heavy nuclei or survival of
the Compound...
A campaign of measurements has been performed at the IGISOL facility, Accelerator Laboratory of Jyväskylä, exploring a long chain of silver isotopes resulting in measurements of charge radii, electromagnetic moments, spins, masses and excitation energies [1,2]. Different production mechanisms have been used, including fission, light- and heavy-ion fusion-evaporation. When combined with...
A new setup, based on stopping nuclei in the gas cell and subsequent resonance laser ionization and separation by magnetic field or time of flight is under stage of realization at JINR Flerov Lab. This setup is devoted to synthesis and study of new heavy nuclei formed in low energy multi-nucleon transfer or fusion reactions.
The heavy nuclei are very important for nuclear physics...
Light nuclei away from the valley of stability are characterized by low binding energies for valence nucleons, leading to the formation of an extended matter distribution that, in some nuclei, appear as exotic configurations like halo (e.g. $^8$B and $^{11}$Be) and borromean (e.g. $^6$He and $^{11}$Li) structures. These exotic structures manifest themselves in a nuclear collision as a narrow...
R. Linares1
1 Instituto de Física, Universidade Federal Fluminense, 24210-340, Niterói, RJ, Brazil
Light nuclei away from the valley of stability are characterized by low binding energies for
valence nucleons, leading to the formation of an extended matter distribution that, in some
nuclei, appear as exotic configurations like halo (e.g. 8B and 11Be) and borromean (e.g. 6He
and 11Li)...
The RAON facility includes multiple experimental systems. These systems include the Korea Broad Acceptance Recoil Spectrometer and Apparatus (KoBRA), focused on rare ion beam (RI) research, and the Nuclear Data Production System (NDPS), a neutron production system.
KoBRA operates with stable and rare isotope beams at low energies of 1–40 MeV/u, facilitating experiments in nuclear physics....
A short review of some recent results of collaboration Dubna – Darmstadt – Erlangen - Bratislava - Prague – Johannesburg is presented. Theoretical analysis is performed within fully self-consistent quasiparticle random-phase approximation method with Skyrme forces.
As the first item, the exotic toroidal E1 mode is outlined. It is shown that this vortical mode is a general feature of...
Recently the extremely neutron-rich systems 7H and 6H were studied in the direct 2H(8He,3He)7H [1,2] and 2H(8He,4He)6H [3] transfer reactions with a 26 AMeV secondary 8He beam produced at the fragment separator ACCULINNA-2 (FLNR, JINR)[4]. The missing mass spectra and center-of-mass angular distributions of 7,6H, as well as the momentum distributions of the 3H fragment in the 7,6H frames,...
In an effort to contrbitute towards a better understanding of the dynamics of three-body weakly-bound systems, we present an analysis of the effect of three-body and nucleon-nucleon interactions on the ground-state binding energy and wave function. It is found that the for a deeper three-body interaction, the 22C → 20C + n + n remains bound even when the neutron-neutron interaction is switched...
In the study of three-body weakly-bound systems, a three-body interaction is always introduced to take care of the dynamics that cannot be accounted for by two-body interactions. In order to get some insight into these dynamics, in this presentation, we study the relevance of the three-body interaction as the number of neutrons in the three-body system increases, considering $^6{\rm He}$...
S. Shezi, H.A.A. Abdelbagi, L. Mdletshe, M. Dubazane, S.S
Ntshangase
1PhysicsDepartment, University of Zululand,KwaDlangezwa, 3886, South
Africa
Abstract
The radiation shielding properties of the glass system 32GeO2-15B2O3-3ZnO-5P2O5-
45Tb2O3 doped with Ho2O3, Pr6O11, Er2O3, Nd2O3, Dy2O3, and CeO2 within the X-ray
energy range of 0.03–0.3 MeV have been investigated.The linear...
SCRIT facility [1] is a unique facility specifically designed for electron scattering measurement of short-lived nuclei. In 2023, we published the world’s first result [2] of the electron scattering measurement of short-lived nuclei 137Cs.
In this presentation, we will show the current status of the SCRIT facility, and the future plan for upgrade in order to further measurement of much...
The angular distributions of the 1-n transfer reaction 10B(7Li,6Li)11B, as well as the elastic scattering of 7Li, were measured at E_lab = 58 MeV. Experiment was done using U-400 accelerator beam of the FLNR JINR, Dubna.
The attention was paid to ground state (g.s.) and excited (J= 0+, T= 1, E= 3.56 MeV) state of 6Li which is an isobar analogue state (IAS) of 2n-halo nucleus 6He.
Angular...
Since the establishment of the first cyclotron in China in 1958, the China Institute of Atomic Energy (CIAE) has developed a series of high-current cyclotron devices, which are playing a crucial role in the development of nuclear science disciplines and applications of nuclear technology in China. In 1996, CIAE had developed the first proton cyclotron of 30 MeV/350 μA in China for medical...
The existence limit of nuclei and the origin of the heavy elements are fundamental problems in modern science. The relativistic density functional theory starts from a universal density functional and has achieved great successes in describing many nuclear phenomena. New physics wonder may result from the strong coupling between theory and experiment perspectives. In this talk, the predictive...
The DIAMANT light-charged-particle detector from ATOMKI was coupled with the AFRODITE gamma-ray spectrometer at iThemba LABS in a collaboration enabled by a bilateral agreement between the governments of South Africa and Hungary. This facilitated the study of incomplete fusion reactions in the bombardment of a Ytterbium-176 target with a beam of 50 MeV Lithium-7 ions. The beam was generated as...
