Latest News----Institute of Modern Physics

A New Measurement of Charge-Exchange Reaction Helps Us Understand Core-Collapse Supernovae

Some massive stars end their life as core-collapse supernovae (CCSNe), which is the most energetic and mysterious event in the universe. A large amounts of energy will be released during CCSNe and the whole galaxy can be lighted up. Decades of efforts have been devoted to understanding CCSNe while some open questions still remain. One of the important physical inputs in CCSNe simulations is the...Researchers from many institutions, including the Institute of Modern Physics of the Chinese Academy of Sciences, have lately made progress in the study of the electron-capture rates of the 93Nb by...

| 23 03, 2020

Scientists Reveal Impact of New Masses of Nuclei on X-ray Bursts

Recently, significant progress was made in understanding the impact of new masses of nuclei on the X-ray bursts by an international nuclear astrophysical team. Type I X-ray bursts are the most frequent types of thermonuclear stellar explosions in the Galaxy. Nuclear masses are key nuclear physics inputs in rp-process, and the accuracy is vital for soundly understanding the mechanism of X-ray bu...Recently, significant progress was made in understanding the impact of new masses of 27P and 27S on the X-ray bursts by an international nuclear astrophysical team.
　　This work was led by XU Xinx...

| 12 03, 2020

Researchers Prove Tensor Force Invalid in Skyrme Density Functionals

The tensor force is a hot topic in nuclear physics, which affects the shell evolution. Based on the derived tensor force in momentum space via partial-wave expansion, researchers demonstrated such a tensor force invalid, and hence the widely employed tensor force of the Skyrme interactions invalid. Researchers then proposed a new scheme and accordingly built two new Skyrme interactions—IMP1 an...The tensor force is a hot topic in nuclear physics, which affects the shell evolution. Moreover, the short-range correlation, which is dominated by the strong tensor force between unlike nucleons, ...

| 05 02, 2020

Isotope Laboratory of Gansu Province Established

The Isotope Laboratory of Gansu Province, which centers on isotopes and related technologies, was unveiled on January 20th and officially established. The laboratory is operated and managed by IMP. According to the prediction of scientists, there are more than 8000 isotopes and so far about 3200 kinds have been found.The Isotope Laboratory of Gansu Province, which centers on isotopes and related technologies, was officially established on January 20th in Lanzhou .
　　Located in the Lanzhou New Area, the labora...

| 21 01, 2020

Scientists Reveal Enzymatic Hydrolysis Process of Alkali Pretreated Straw

Researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences have made progress in the study of enzymatic hydrolysis process of alkali pretreated straw lately. The research provides insight into the structural changes and visualization of the hydrolysis process. These findings will help to design plant cell structures and plant tissues at the organization level, and...Researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences have made progress in the study of enzymatic hydrolysis process of alkali pretreated straw lately.
　　Lign...

| 17 01, 2020

A New Operation Mode of HIRFL Tested Successfully

On January 7, the Heavy Ion Research Facility in Lanzhou (HIRFL) provided the beam for users by the combination of three different types of accelerators. By the new operation mode, it is possible to obtain highly-charged heavy ion beams with the energy higher than other modes operated previously. The new operation mode will greatly improved the efficiency and capacity of HIRFL.On January 7, the Heavy Ion Research Facility in Lanzhou (HIRFL) provided the Bi55+ beam for users by the combination of three different types of accelerators.
　　This is the first attempt in the ...

| 10 01, 2020

First Slow Extraction of Beam with Maximum Magnetic Rigidity at HIRFL-CSRm

On January 1，the beam with the energy of 150 MeV/u was extracted smoothly within 3 seconds from the main cooling storage ring (CSRm) at the Heavy Ion Research Facility in Lanzhou (HIRFL). It is the first time that the beam with the maximum magnetic rigidity has been extracted by the slow extraction system at HIRFL-CSRm. This great improvement will benefit users in material research, bioscience...On January 1, the Bi36+ beam with the energy of 150 MeV/u was extracted smoothly within 3 seconds from the main cooling storage ring (CSRm) at the Heavy Ion Research Facility in Lanzhou (HIRFL).
　...

| 08 01, 2020

Researchers Find an Isomeric State in ²¹⁸Pa

Researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences and their collaborators have recently found an isomeric state in 218Pa for the first time. Isomeric transitions in nuclei near closed proton or neutron shells are of special interest, for they provide relatively pure and detailed information on the single-particle structure of these nuclei.The result remov...Researchers from the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences and their collaborators have recently found an isomeric state in 218Pa for the first time. The result was p...

| 03 01, 2020

Scientists Reveal Type II Shell Evolution in Odd-Z Nuclei

The mass measurement collaboration of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou ( HIRFL-CSR ) lately revealed the type-II shell evolution in odd-Z nuclei for the first time. The shell structure may vary in a phenomenon called shell evolution, which is one of the research frontiers of nuclear physics. On November 27, the results were published in Physical Review C as ...The mass measurement collaboration of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou (HIRFL-CSR) lately reported first precision mass measurements of the isomeric and ground ...

| 25 12, 2019

HIRFL Begins Operation with Continuous Wave Linac Injector

China ' s first beam commissioning of SSC-Linac as an injector of the Separate Sector Cyclotron ( SSC ) was performed successfully by researchers from the Institute of Modern Physics ( IMP ) of the Chinese Academy of Sciences .On December 17, the particle energy of 5.98MeV/u was obtained at the exit of SSC at the Heavy Ion Research Facility in Lanzhou (HIRFL). China's first beam commissioning of SSC-Linac as an injector of the Separate Sector Cyclotron (SSC) with the 40Ar7+ beam was performed successfully by researchers from the Institute of Modern Phys...

| 20 12, 2019