A5020868565- Nuclear physics research studies
- Nuclear Physics and Applications
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Astro and Planetary Science
- Gamma-ray bursts and supernovae
- Quantum, superfluid, helium dynamics
- Radiation Therapy and Dosimetry
- X-ray Spectroscopy and Fluorescence Analysis
- Radiopharmaceutical Chemistry and Applications
- Particle accelerators and beam dynamics
- Molecular Spectroscopy and Structure
- Radioactive element chemistry and processing
- Mass Spectrometry Techniques and Applications
- Solar and Space Plasma Dynamics
- Neutrino Physics Research
- Geomagnetism and Paleomagnetism Studies
- Graphite, nuclear technology, radiation studies
- Magnetic confinement fusion research
- Particle physics theoretical and experimental studies
- Nuclear and radioactivity studies
- Particle Accelerators and Free-Electron Lasers
Institute of Modern Physics
2015-2024
Chinese Academy of Sciences
2011-2024
University of Chinese Academy of Sciences
2009-2023
Max Planck Institute for Nuclear Physics
2015-2021
GSI Helmholtz Centre for Heavy Ion Research
2015-2017
Max Planck Society
2015
Utah State University
1990-1994
Los Alamos National Laboratory
1994
Masses of neutron-deficient 58Ni projectile fragments have been measured at the HIRFL-CSR facility in Lanzhou, China employing isochronous mass spectrometry technique. a series short-lived Tz = −3/2 nuclides including 45Cr nucleus with relative uncertainty about 10−6–10−7. The new turned out to be essential for modeling astrophysical rp-process. In particular, we find that formation predicted Ca–Sc cycle X-ray bursts can excluded.
Abstract In-ring nuclear reactions induced by light-ions, which are characterized low-momentum sensitivity and low background, play an important role in structure astrophysics investigations.
Recently, the in-ring proton-nucleus elastic scattering measurements at momentum transfer based on internal hydrogen-gas-jet target have been successfully performed Cooler Storage Ring of Heavy Ion Research Facility Lanzhou (HIRFL-CSR).
In this proceeding, we present progress matter...
In this paper, we present direct mass measurements of neutron-rich $^{86}$Kr projectile fragments conducted at the HIRFL-CSR facility in Lanzhou by employing Isochronous Mass Spectrometry (IMS) method. The new excesses $^{52-54}$Sc nuclides are determined to be -40492(82), -38928(114), -34654(540) keV, which show a significant increase binding energy compared reported ones Atomic Evaluation 2012 (AME12). particular, $^{53}$Sc and $^{54}$Sc more bound 0.8 MeV 1.0 MeV, respectively. behavior...
Highly charged radioactive ions can be stored for extended periods of time in storage rings which allows precision measurements their decay modes. The straightforward motivation performing such studies is that fully ionised nuclei or few-electron viewed as clean quantum-mechanical systems, the interactions many electrons either excluded treated precisely. Thus, influence electron shell on probability investigated. Another important stellar nucleosynthesis, proceeds at high temperatures and...
The very first in-ring reaction experiment at the HIRFL-CSR heavy-ion storage ring, namely proton elastic scattering on stable $^{58}$Ni nuclei, is presented. circulating $^{58}$Ni$^{19+}$ ions with an energy of 95 MeV/u were interacting repeatedly internal hydrogen gas target in CSRe experimental ring. Low recoils from collisions measured ultra-high vacuum compatible silicon-strip detector. Deduced differential cross sections normalized by measuring K-shell X-rays projectiles due to...
Available experimental neutron skin thicknesses of even-even stable Ca, Ni, Sn, Pb, and Cd isotopes are evaluated, separate trends thickness versus relative excess $\ensuremath{\delta}=(N\ensuremath{-}Z)/A$ observed for different isotopic chains. This phenomenon is quantitatively reproduced by the deformed Skyrme Hartree-Fock $+$ Bardeen-Cooper-Schrieffer model with SLy4 force.
The status of the HIRFL (Heavy Ion Facility in Lanzhou) – Cooler Storage Ring (CSR) at IMP is reported. main physics goals HIRFL-CSR are researches on nuclear structure and decay property, EOS matter, hadron physics, highly charged atomic high energy density astrophysics, applications for cancer therapy, space industries, materials biology sciences. first ion cooler-storage-ring system China, which consists a ring (CSRm), an experimental (CSRe) radioactive beam line (RIBLL2). two existing...
An evident odd-even staggering (OES) in fragment cross sections has been experimentally observed many fragmentation and spallation reactions. However, quantitative comparisons of this OES effect different reaction systems are still scarce for neutron-rich nuclei near the neutron drip line. By employing a third-order difference formula, magnitudes extensive experimental systematically investigated with ($N\ensuremath{-}Z$) from 1 to 23 over broad range atomic numbers...
The longitudinal momentum distributions of $^{7}\mathrm{Be}$ fragments in the breakup $^{8}\mathrm{B}$ on a carbon target have been measured at 36 MeV/u. different mechanisms distinguished by coincidence measurements. from both stripping and diffraction are consistent with results noneikonal calculations CDCC calculations. full widths half maximum $124\ifmmode\pm\else\textpm\fi{}17$ $92\ifmmode\pm\else\textpm\fi{}7$ MeV/$c$ for components, respectively. comparison model is discussed. It...
Reported small-angle differential cross sections of proton elastic scattering off $^{20,22}\mathrm{Ne}$ and $^{24,26}\mathrm{Mg}$ at 0.8 GeV were analyzed with the Glauber model. Matter density distributions determined based on two-parameter Fermi model, corresponding root-mean-square point-matter radii are 2.891(52) fm, 2.895(104) 2.935(20) 2.946(21) fm. The occupation number effects $2s$ orbital inner probed by matter difference between $^{22}\mathrm{Ne}$ $^{24}\mathrm{Mg}$. Combined...
Isochronous mass spectrometry was applied to measure isomeric yield ratios of fragmentation reaction products. This approach is complementary conventional $\ensuremath{\gamma}$-ray spectroscopy in particular for measuring long-lived states. Isomeric the high-spin $I=19/2\ensuremath{\hbar}$ states mirror nuclei $^{53}\mathrm{Fe}$ and $^{53}\mathrm{Co}$ are measured study angular momentum population following projectile $^{78}\mathrm{Kr}$ at energies $\ensuremath{\sim}480A$ MeV on a beryllium...
Isochronous mass spectrometry (IMS) in storage rings is a successful technique for accurate measurements of short-lived nuclides with relative precision about $10^{-5}-10^{-7}$. Instabilities the magnetic fields are one major contributions limiting achievable resolving power, which directly related to obtained values. A new data analysis method proposed allowing minimise effect such instabilities. The masses previously measured at CSRe $^{41}$Ti, $^{43}$V, $^{47}$Mn, $^{49}$Fe, $^{53}$Ni and...
Small-angle differential cross sections of proton elastic scattering off $^{78}\mathrm{Kr}$ with a collision energy 152.7 MeV/u were measured at the experimental Cooler Storage Ring Heavy Ion Research Facility in Lanzhou (HIRFL-CSR). Low recoil protons from counted by silicon-strip detector to determine relative sections. A model-dependent root-mean-square matter radius 4.16(12) fm for nucleus was deduced employing Glauber model. Compared 4.13 $^{78}\mathrm{Kr}$, our center value is slightly...
Systematic measurements of 51 isotopic cross sections from fragmentation reactions 240 MeV/nucleon $^{12,14}\mathrm{C}$, $^{14,16}\mathrm{N}$, and $^{16}\mathrm{O}$ projectiles on a carbon target were performed at the RIBLL2 separator external facility (ETF) Heavy-Ion Research Facility in Lanzhou (HIRFL). Our experimental produced by three stable projectiles, i.e., $^{12}\mathrm{C}$, $^{14}\mathrm{N}$, $^{16}\mathrm{O}$, compared with some previous data measured different energies. The...
Recent results and progress of mass measurements proton‐rich nuclei using isochronous spectrometry (IMS) are reported. The under investigation were produced via fragmentation relativistic energy heavy ions 78Kr 58Ni. After in‐flight separation by the fragment separator RIBLL‐2, injected stored in experimental storage ring CSRe, their masses determined from revolution times. impact these on stellar nucleosynthesis rp‐process is discussed.
About 100 isotopes with $(N\ensuremath{-}Z)$ from 1--9 produced by 300 MeV/nucleon $^{78}\mathrm{Kr}$ projectiles impinging on an ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ target have been separated and identified at the RIBLL2 separator of HIRFL, where their production yields measured. The odd-even staggering (OES) in these experimental is quantitatively studied employing a third-order difference formula. Measured data are used to validate universality this OES comparing other fragmentation...
Proton-$^{133}$Cs elastic scattering at low momentum transfer is performed using an in-ring reaction technique the Cooler Storage Ring Heavy Ion Research Facility in Lanzhou. Recoil protons from collisions between internal H$_2$-gas target and circulating $^{133}$Cs ions 199.4 MeV/u are detected by a silicon-strip detector. The matter radius of deduced describing measured differential cross sections Glauber model. Employing adopted proton distribution radius, point-neutron 4.86(21) fm for...
Isochronous mass spectrometry has been applied to neutron-deficient 58Ni projectile fragments at the HIRFL-CSR facility in Lanzhou, China. Masses of four shortlived Tz = -3/2 nuclides 41Ti, 45Cr, 49Fe, and 53Ni have measured with a precision 20 — 40 keV. The new data enabled for first time test isobaric multiplet equation (IMME) fp-shell nuclei. We observed that IMME is inconsistent generally accepted quadratic form A 53, T 3/2 quartet. performed full space shell model calculations compared...