Superheavy Nuclide and Nuclear Structure group
Brief Introduction
The group conducts experimental research on the synthesis and structure of neutron-deficient nuclei, using the state-of-the-art facilities such as gas-filled recoil separators, HPGe gamma-ray detector array and MRTOF-MS at HIRFL and HIAF, as well as other scientific facilities around the world.
Recently, the synthesis of new element has been established as the core work of the group. With the operation of the China Accelerator Facility for Superheavy Elements (CAFE2), a new gas-filled recoil separator, SHANS2 is running, primaritly tarteting the synthesis of element of Z=119. Meanwhile,a powerfull gamma ray detection system IMP-DRAGON, and a novel MRTOF mass spectrometer for the precise mass measurement of short-lived nuclei are in operation. At the HIAF facility, the group is responsible for the development of a high-precision low-energy spectrometer for nuclear structure study, and actively involved in the development of decay station for exotic nulei, spectrometer for spontaneous fission, apparatus for nuclear excitaion by electron capture (NEEC), among other projects.
Currently, around 20 employees, and around 20 graduate students are working at the group.
Research Fields
Synthesis of new elements and isotopes; Study and synthesis of superheavy nuclides; Nuclear structure and gamma ray spectroscopy; Nuclear reactions; Mass measurement of heavy nuclei; Nuclear excitaion by electron capture; Fission of heavy nuclei, etc.
Achievements
Based on the HIRFL facility, the group has synthesized several new neutron-deficient isotopes during past two decades, such as 203-205Ac, 214-216U, 219-220Np, 222-224Np, 160Os, 156W. Notably, two new superheavy nuclei, 259Db and 265Bh, were synthesized for the first time. The group has obtained the experimental evidence that the N = 126 shell effect still exists in the Np isotopes, synthesized the lightest isotope in Uranium chain and revealed the abnormal enhancement of the alpha partical clearstering.
Furthermore, structures of isotopes like 218Pa、223U、130Ba、131Ba、187Au、46Ti have been investigated. Research on NEEC and 252Cf fission has yielded fruitful outcomes. The reaction dynamics of 9Be and 18O projectiels has been systematicaslly studied. Additionally, the laboratory has successfully developed a high sensitivity and high resolution MRTOF-MS prototype, for the precise nuclear mass measurement.
The research results were published in renowned nuclear physics and instrumentation journals such as Phys.Rev.Lett, Phys.Lett.B, Phys.Rev.C, and Nuclear Inst. and Methods, etc.
Photos
Contact
Contact: Prof. ZHANG Zhiyuan
Tel: 0931-4969301
Email: zhangzy(at)impcas.ac.cn


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