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物理学
Properties of Z=114 super-heavy nuclei
The center of the stability island of super-heavy nuclei(SHN) is the subject of intense experimental and theoretical investigations and has potential technological applications._(114)~(298)Fl lies in the Z=114 isotopic chain as a persuasive candidate of the spherical double-magic nucleus in SHN,and in this study,the calculations of nuclear binding energies,one-nucleon and two-nucleon separation energies,a-decay energies,and the corresponding halflives provide strong evidence for this point.These calculations within an improved Weizsacker-Skyrme nuclear mass model(WS~*) were performed and compared with the calculations of the finite-range droplet model(FRDM2012)and experimental data for Z=114 isotopes and N=184 isotones.Concurrently,the corresponding single-particle levels in a Woods-Saxon potential well with a spin-orbit term are calculated,which can be used as a powerful indicator to identify the shell effects existing in_(114)~(298)Fl. Both the study of the properties of the isotopic chain and microphysical quantities provide a vital signal that_(114)~(298)Fl is a spherical double-magic nucleus and also the center of the SHN.
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Nuclear Science and Techniques
2021年06期
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