Latest News----Institute of Modern Physics

Scientists Establish a New Model of α-cluster Formation in Heavy α-emitters

Researchers at IMP and their collaborators have established a new model—multistep model, and calculated the corresponding formation probability of some typical α-emitters. The present work may help scientists to get more information of superheavy nuclei, and provide a distinctive way to clarify the neutron-proton pairing properties in N≈Z nuclei. As one of the most important decay modes for heavy and superheavy nuclei, α-decay was regarded as a quantum-tunneling effect firstly in the pioneering works of Gamov, Condon and Gurney in 1928, wh...

| 07 02, 2021

Researchers Obtain New Results on Dielectronic Recombination Precision Spectroscopy

Researchers at IMP and their collaborators recently obtained new results on dielectronic recombination precision spectroscopy. The precision spectrum obtained in this work can not only be used to study the energy level structure of highly charged ions and thereby test the theory, but also provide high-precision benchmark data for the diagnosis and modeling of astrophysical and fusion plasmas. Researchers at the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) and their collaborators recently obtained new results on dielectronic recombination precision spectrosc...

| 08 01, 2021

Half-aperture Prototype of Superconducting Combined-function CCT Magnet for HIAF-HFRS Successfully Completes Cryogenic Test

The half-aperture CCT (Canted-Cosine-Theta) superconducting Quadrupole-Sextupole-Combined-Function magnet prototype, which is independently developed by the High Intensity heavy-ion Accelerator Facility (HIAF) team, has completed its first time full-load current excitation test on December 25. The half-aperture CCT (Canted-Cosine-Theta) superconducting Quadrupole-Sextupole-Combined-Function magnet prototype, which is independently developed by the High Intensity heavy-ion Accelerator Fac...

| 31 12, 2020

Researchers Clarify Role of Nucleon-nucleon Correlation in Transport Coefficients and R-mode Instability of Neutron Stars

Researchers at IMP have recently clarified the role of the nucleon-nucleon correlation in the thermal conductivity and shear viscosity in the AK (Abrikosov and Khalatnikov) framework. The result was published in Physical Letters B. As a class of compact objects, neutron stars (NSs) contain extreme neutron-rich matter at supranuclear density in their interiors. And a rapidly rotating NS is regarded as a gravitational wave sour...

| 29 12, 2020

JUNA 400kV Accelerator Delivers First Intense Beam in Deepest Underground Laboratory

The JUNA 400kV accelerator installed at China JinPing deep underground Laboratory (CJPL) successfully delivered its first intense beam on December 26. The accelerator is jointly developed by China Institute of Atomic Energy (CIAE) and the Institute of Modern Physics (IMP) of the of Chinese Academy of Sciences (CAS). The JUNA (Jinping Underground Nuclear Astrophysics collaboration) 400kV accelerator installed at China JinPing deep underground Laboratory (CJPL) successfully delivered its first intense beam on De...

| 28 12, 2020

Study Reveals Enhanced Triple-α Reaction Reduces Nucleosynthesis in Supernovae

In a recent study published in Nature, scientists reveal that the enhanced triple alpha reaction in the high temperature and high density environment increases the production of 12C, which reduces the robustness of proton-rich nucleosynthesis in supernovae. Their findings change a long-standing view on the origin of Mo and Ru isotopes.In a recent study published in Nature, scientists reveal that the enhanced triple-alpha reaction in the high temperature and high density environment increases the production of 12C, which reduces ...

| 25 12, 2020

Scientists reveal reaction mechanism of ¹¹Be nucleus

For the first time, researchers at IMP and their collaborators have studied the elastic scattering and breakup reactions of 11Be on 208Pb at an incident energy of 140 MeV, which corresponds to about 3.5 times of the Coulomb barrier (VB≈39.5 MeV). The experiment was conducted at the Radioactive Ion Beam Line in Lanzhou, the Heavy Ion Research Facility of Lanzhou (HIRFL-RIBLL). Scientists from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) and their collaborators have lately made new progress in the study of the reaction mechanism of 11Be n...

| 07 12, 2020

Researchers Present New Measurement of Deuteron Collective Flow at RHIC-STAR

Relativistic heavy ion collisions can form a new strongly interacting matter — Quark Gluon Plasma (QGP), which is believed to be the state of our universe in the early moments of the big bang and the state of the inner neutron stars. Recently, researchers at the Institute of Modern Physics measured one of the deuteron collective flow, directed flow (v1), in Au+Au collisions at energies of 7.7-...Relativistic heavy ion collisions can form a new strongly interacting matter — Quark Gluon Plasma (QGP), which is believed to be the state of our universe in the early moments of the big bang and ...

| 07 12, 2020

Scientists Discover the Largest Isospin Asymmetry in Nuclear Low-lying States

In a recent study published in Physical Review Letters, researchers at the University of Hong Kong (HKU), the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences (CAS) and their collaborators studied β-delayed one-proton emissions of 22Si, and discovered the largest isospin asymmetry in nuclear low-lying states. Symmetry exists extensively in nature. Examples range across size scales from macroscopic objects, such as spiderwebs or honeycombs, to the microscopic world with its arrangement of atoms in molecu...

| 17 11, 2020

A new study sheds light on nuclear reaction production mechanisms of ⁹⁴Tc nucleus

Scientists from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences, University of Surrey of UK, and Universidade Federal Fluminense of Brazil have lately made new progress in the study of the production of 94Tc nucleus. The study extends information on the reaction mechanisms and production of 94Tc, a biologically important nucleus.Scientists from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences, University of Surrey of UK, and Universidade Federal Fluminense of Brazil have lately made new progress in ...

| 13 11, 2020