Conveners
Experimental Nuclear Physics for Astrophysics
- Livius Trache (IFIN-HH)
Experimental Nuclear Physics for Astrophysics
- Weiping Liu
Experimental Nuclear Physics for Astrophysics
- Shigeru Kubono (RIKEN Nishina Center)
Experimental Nuclear Physics for Astrophysics
- Richard deBoer (University of Notre Dame)
Experimental Nuclear Physics for Astrophysics
- Weiping Liu
Experimental Nuclear Physics for Astrophysics
- Toshitaka Kajino (Beihang University, National Astronomical Observatory of Japan, University of Tokyo)
The radioactive isotopes (RI) seldom exist on the earth, but they
can be created in the universe and often play an important role in explosive stellar sites,
contributing to the nucleosynthesis, stellar evolution and thermal dynamics.
Several experimental projects at CRIB [1-3], a low-energy RI beam separator operated by Center for Nuclear Study, the University of Tokyo and located at...
The triple alpha (3$\alpha$) reaction is one of the most important processes in the nucleosynthesis. In this reaction, an $\alpha$ particle is captured by the 2$\alpha$ resonance of $\rm ^{8}Be$, and form a 3$\alpha$ cluster state with weakly bound $\alpha$ particles. Most of the 3$\alpha$ resonance states decay to three $\alpha$ particles, but a tiny fraction of them decays to the ground...
Transfer reaction measurements in normal kinematics using light stable beams are very powerful tools to study the properties of single-particle states of unstable nuclei important for astrophysical phenomena. The measurements are also useful to extract the proton branching ratios of populated excited states of unstable nuclei. In the presentation, we will summarize the results of proton...
Where and how were heavy elements which contain many neutrons relative to proton, synthesized? With regards to the origin of these heavy elements, a reaction in which nuclei capture neutrons in a fast and continuous manner during the explosion of a star was proposed and named the rapid neutron capture process (r process) [1].
In 2017, a binary neutron star merger event was discovered by...
22,23Na+p resonance scattering were studied via thick-target inverse kinematics method, for the exit-channel resonance parameters of compound nuclei 23,24Mg. High-purity 22Na secondary beam was produced by 1H(22Ne,22Na)n reaction at RIBLL1, excitation functions of 22Na(p,p) were obtained at two angles up to 4MeV. The deduced 23Mg resonances were used for the evalution of the reaction rates of...
Storage rings provide a unique experimental environment for non-destructive measurements of the mass and lifetime of unstable nuclei and/or their isomeric states. With their high resolution, cavity based Schottky detectors provide the speed and sensitivity required for such measurements. In order to increase the measurement accuracy, the velocity spread of the particles has to be dealt with....
Accurate nuclear masses not only provide indispensable information on nuclear structure, but also deliver important input data for applications in nuclear astrophysics. The challenge today is to obtain accurate masses of nuclei located far away from the valley of stability. Recently, we have developed a brand new technique, the Bρ-defined isochronous mass spectrometry (IMS), at the cooler...
Active Target Time Projection Chamber (AT-TPC) is one of advanced particle detectors which allows a precise measurement of nuclear reactions using rare isotope beams at the present and future nuclear physics facilities. A new Active Target TPC for Multiple nuclear physics eXperiments (AToM-X) is being developed at the Center for Exotic Nuclear Studies (CENS). It consists of a highly segmented...
It has been a long-standing problem that the available kinetic energy is insufficient in the theoretical simulation of the core-collapse supernova explosions. In this work, the energy transfer via the coherent scattering of neutrinos with matter in outgoing shockwave is studied by numerical evaluation for the expected energy transfer. It was found that the process can be a candidate of a new...
It is an widely accepted and used idea that when we cannot make direct measurements for nuclear reactions that are important in nuclear astrophysics due to very small cross sections and/or for impossible/difficult projectile combinations, we resort to indirect methods. There many Indirect Methods in Nuclear astrophysics, some well known. I will discuss here two less known ones: fusion of light...
An experimental program to address uncertainties in the thermonuclear rates of proton and alpha induced reactions with the greatest influence on the modeling of astronomical observables from transient events including classical novae and X-ray bursts will be described. The goal is to discover and characterize key resonances in reactions on unstable reactants by measuring their energies and...
X-ray burst is frequently observed thermonuclear explosion events in the universe. Understanding its light curve is inevitable to unveil the properties of neutron stars. The shape of the light curve is sensitive to many nuclear reaction rates. It is shown that the $^{59}$Cu(p,$\gamma$)$^{60}$Zn and $^{59}$Cu(p,$\alpha$)$^{56}$Ni reaction rates have the largest influence on the light curve....
The Back-n white neutron facility is a comprehensive experimental platform that serves a wide spectrum of research goals, including nuclear data measurement, experiments in nuclear physics and astrophysics, calibration of neutron detectors, investigation of neutron radiation effects, and applications in archaeology, among others. Operational since 2018, this beamline has facilitated over 300...
Electron scattering is the gold standard for probing nuclear structures, consistently playing an essential role in revealing the internal structures of atomic nuclei and in establishing modern pictures of their structures. To date, its application, however, has been strictly limited to stable nuclei (with some exceptions such as 3H), leaving short-lived unstable nuclei...
We report the measurement of 159Tb(n, γ) cross sections up to 1 MeV neutron energy with the TOF method at the back streaming white neutron facility of the China Spallation Neutron Source (CSNS), which is the only high intense pulsed spallation reaction neutron source in China at present. The resonance kernels of 159Tb (n, γ) are obtained up to 1.2 keV, and the MACS for the astrophysical...
The study of the p-process is of paramount importance in unraveling the origin of heavy elements in the universe. To describe the entire p-nuclei nucleosynthesis process, a comprehensive reaction network involving over ten thousand nuclear reactions is required, and accurate measurements of some key reaction cross sections are essential for determining reaction rates. 102Pd is one of the more...
Understanding the origin of elements in our universe is an inevitable mission for modern nuclear physics. It is known that neutron-deficient stable isotopes, referred to as $p-$nuclei, are synthesized through the $p$-process (or $\gamma$-process) triggered by photo-disintegration in supernovae. One of the major issues that remain unresolved is the anomalously large abundances for certain...
Storage rings are powerful tools for conducting precision experiments with both stored highly-charged stable and radioactive ions in the realm of nuclear structure and astrophysics. The storage rings at GSI Helmholtz Center in Darmstadt, Germany, namely, the heavy-ion storage ring - Experimental Storage Ring (ESR), and the low energy storage ring - CRYRING provide unique possibilities to...
