Beijing Daily Client | Reporter Liu Suya
Research team from the Institute of Modern Physics, Chinese Academy of Sciences cooperated with multiple teams to synthesize a new nuclide actinide-204. This is the 35th new nuclide found at the institute and the first new nuclide synthesized on a new inflatable recoil spectrometer. Related research results were recently published in Physical Communications B.
Gan Zaiguo's research team at the Super Heavy Nuclear and Nuclear Structure Room of the Nuclear Physics Center of the Institute of Modern Physics and collaborators used the beam current provided by the Lanzhou Heavy Ion Accelerator and the China Super Heavy Element Research Accelerator Device to successfully synthesize the new nuclide actinium-204 through fusion and evaporation reaction on the inflatable recoil spectrometer, and measured its alpha decay energy with the half-life , which was consistent with the theoretical prediction.
nuclide is a different atom formed by the same element due to different neutron numbers. The half-life of atom nucleus is related to the alpha particle energy released by it. Usually, the half-life and the alpha decay energy have synchronous parity fluctuations when the neutron number of isotopes change. Huang Minghui, a researcher at the Institute of Modern Physics, introduced that the research found that this synchronous fluctuation did not appear in actinium-204 and other nuclides with less than 119 neutrons. Compared with atomic nucleus actinium-205 with even neutrons, the chance of forming an alpha group near the nuclear surface is lower. This study helps people understand the role of mononucleons in alpha decay.
