Presentation materials
Isochronous mass spectrometry has been applied in the storage ring CSRe to measure the masses of the
Production of neutron-rich nuclei through one-nucleon knockout (p,2p) reactions has been successfully demonstrated with the MINOS at RIBF. In future RIBF experiments, a method to remove more than one protons with a reasonable rate will be required for production of more neutron-rich nuclei. At present there is no consensus on what the best reaction for two-proton removal is. In this...
It is well known that shape coexistence was observed in stable even-even Sn(Z=50) nuclei, and the even-odd neighboring nucleus may have a hint of the structure. So far, some single-particle like states in Sn were observed by measuring (d,p) reaction on Sn. Though the isobaric analog resonances corresponding to the low-lying states in Sn were already measured for the spectroscopic information...
The proton radius has a serious problem in the todayโs physics. The proton charge radius has been measured by electron scattering for more than fifty years and hydrogen spectroscopy. Since these results were consistent within experimental error, the proton radius has been believed to be
High energy
We report the measurement of differential cross section of the 11Li(p,t)9Li reaction performed at TRIUMF. Previous investigation of the reaction was reported at lower energy of 3A MeV [1]. Present data were taken at higher energy where the direct reaction mechanism is expected to be more dominant. It will be shown that the present measurement shows the transition to a higher excited state than...
Odd-mass nuclei are different from even-even nuclei in having finite spins in the ground state and breaking time-reversal symmetry. These differences make odd-mass nuclei more interesting and at the same time more difficult to study. Conventionally, an odd-particle system in Hartree-Fock-Bogoliubov theory or density functional theory is treated as a one-quasiparticle excited state on the...
Atomic nuclei are self-bound quantum many-body systems that consist of protons and neutrons, and protons and neutrons interact with each other by the nuclear and electromagnetic forces. In nuclear physics, the study of the nuclear force is still one of the most important topics, since the exact form of the nuclear force is still unknown [1]. It is known that nuclear force has almost the...
The accurate computation of the properties of bulk nuclear matter is a long-lasting theoretical problem in nuclear physics. The basic difficulties stem from the strong short-range repulsion between nucleons.This renders a straightforward perturbative calculation impossible. In the last few decades, different many-body perturbation theories have been devised to affront this problem. We mainly...
We investigate the nuclear abundances uniquely produced from the neutrino-process in supernova (SN) explosion. We calculate the neutrino flux propagation and its modification by neutrino self-interactions near the neutrino-sphere along with the Mikheyev-Smirnov-Wolfenstein (MSW) mixing in the outer envelopes. We compute the neutrino-induced nucleosynthesis of
The density functional theory (DFT) is one of the most successful approaches to calculate the ground-state properties of atoms, molecules, and solids [1, 2]. The DFT is also applicable to nuclear systems [3, 4]. In principle, the DFT gives the exact ground-state density
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A single particle states and energies simply are calculated by the Woods-Saxon potential. It corresponds with the concept of one-body potential and is a typical calculation of microscopic understanding the nuclear structure. However, this concept is not enough to make a relation between single particle energy and total binding energy. We, therefore, introduced the Strutinsky's method, as a...
Tensor force is one of the important components of the nucleon-nucleon interaction. With the advance of radioactive-ion-beam facilities around the world, much progress has been made in the study of the structure of exotic nuclei, and the critical role of the tensor force in the shell evolution of the exotic nuclei has been of great interest in the new century.
The nuclear density functional...
In this framework we study the effect of local optical potential on the radiative capture 12C(p,ฮณ)13N and 13C(p,ฮณ)14N reactions. The optical potential of nucleon-nucleus interaction is constructed by parameterization of Woods-Saxon potential and folding model using the effective nucleon-nucleon interaction CDM3Yn based on an extended Hartree-Fock calculation. The result indicates that the both...
The experimental value of muon g-2 factor is different with theoretical value that calculated from standard model. Therefore, measuring the g-2 factor has been considered as the key for beyond standard model. Muon g-2/EDM E34 experiment in J-PARC is one of the experimental effort to measure the magnetic moment of muon more precisely. Since the muon beam is used for this experiment, it is...
In high-energy nuclear physics, the property of quark gluon plasma is a key target. In traditional nuclear physics, the structure of light nuclei is always an important field. In recent years, it has been proposed that relativistic heavy-ion collision also offers a possibility of studying low-energy nuclear structure phenomena. Through
We apply a multi-phase transport (AMPT) model to study two-particle angular correlations in pp collisions at โs = 7 TeV. Besides being able to describe the angular correlation functions of meson-meson pairs, a large improvement for the angular correlations of baryon-baryon and antibaryon-antibaryon is achieved. We further find that the AMPT model with new quark coalescence provides an even...
(t,p) two-neutron transfer reactions are well suited for studying pairing correlations and shape coexistence phenomena. At radioactive beam facilities, (t,p) reactions have to be performed in inverse kinematics requiring a tritium target.
At TRIUMF a tritium-loaded titanium target has recently become available. For the analysis and planning of future experiments, it is desirable to...
In carbon isotopes, the cluster structure is developed and some excited resonant states regarded as gaslike state of ฮฑ particles appears. For example, the resonant state called the Hoyle state in
Recently, study on unstable nuclei near the neutron dripline has been attracted by the development of radioactive ion-beam experiments. The optical potential between a projectile and a target is a basic ingredient to describe the elastic scattering. In the neutron-rich region, it is difficult to determine the phenomenological optical potential due to restrictions on experimental data....
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Nuclear reactions for the long-lived fission product (LLFP)
Fast neutron detection using recoil proton track detector based on organic fiber array is widely used to detect single neutron event. To broaden its energy detection range, a multi-size fiber array structure is designed and evaluated under Monte-Carlo simulation in our work. A test detector is also developed, archieving a energy resolution of 43% at neutron energy of 14.1MeV generated by D-T...
The 511 keV gamma rays and below emitted by novae are mainly produced by 18F, the flux may be detected by satellite detectors. We can effectively constrain the novae model by comparing the theory and observation results. As the main consumed reaction of 18F, 18F(p,ฮฑ)15O, its reaction rate is extremely important and has been invested for decades. This poster is mainly to introduce the gamma...
The molecular absorption spectra revealed the existence of molecular species in interstellar media(ISM). However, the reason for the existence is still unknown. To explain the existence of molecules, we make an interstellar cloud model which can describe the current chemical state of ISM. We have improved a previously suggested static cloud model, which fit only a few observational data, by...
The superfluid many-body systems can be described by Hartree-Fock-Bogoliubov equation. However, the HFB calculations is not feasible when systems have a large number of particles or quasi-continuum spectrum. In this case, the superfluid Thomas-Fermi approximation is very useful. Furthermore, the second-order superfluid Thomas-Fermi approximation has been derived. We know the 2nd-order...
Gamma strength function is importance information to study nuclear structure by experiment. The experiment data is corrected the nuclear structure models. Nowadays, the comparison between experiment and theory of gamma strength function is significant two to four order differences. This report presents some results of experimental of gamma strength function which is based on 48Ti(n,2๏ง)49Ti reaction.
Nuclear medicine is an important application of nuclear physics in the field of medicine. As the primary means of nuclear medicine, Positron Emission Tomography (PET) and Gamma Camera are the most effective methods for early diagnosis of tumors by detecting and imaging the gamma rays produced by radioactive tracers. In this work, the characteristics of pixel silicon photomultiplier (SiPM) and...
Gamow-Teller(GT) transition is one of the basic excitation modes in nuclei. Though these kind of excitation modes are well studied on stable nuclei, data on exotic nuclei are still lacking. Due to the high isospin asymmetry [(N-Z)/A] of neutron dripline nuclei, the energy gain of GT resonance of these nuclei is expected to be enhanced. In addition, 6He is a halo nucleus, itโs...
MESA(Modules for Experiments in Stellar Astrophysics) simulate stellar evolution to solve the equations including many physical processes such as nuclear reaction, equation of state, and opacity in 1-D. It can also simulate the X-ray burst using the profile of neutron star surface and the accretion information. But MESA does not deal with the PRE(Photospheric Raidus Expansion) phenomena...
Electron capture rates of nuclei near iron in stars are important inputs for network calculation. In stars, nuclei may be excited due to the high temperature circumstances and then reactions on excited nuclei plays an important role in nucleosynthesis.
One possible way to perform reaction study on excited state is to measure the reaction with an โisomerโ beam in inverse kinematics.The...
