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Alpha-decay properties of superheavy elements $Z=113-125$ in the relativistic mean-field theory with vector self-coupling of $omega$ meson | | M.M. Sharma
; A.R. Farhan
; G. Münzenberg
; | | Date: |
28 Sep 2004 | | Journal: | Phys.Rev. C71 (2005) 054310 | | Subject: | nucl-th nucl-ex | | Abstract: | We have investigated properties of $alpha$-decay chains of recently produced superheavy elements Z=115 and Z=113 using the new Lagrangian model NL-SV1 with inclusion of the vector self-coupling of $omega$ meson in the framework of the relativistic mean-field theory. It is shown that the experimentally observed alpha-decay energies and half-lives are reproduced well by this Lagrangian model. Further calculations for the heavier elements with Z=117-125 show that these nuclei are superdeformed with a prolate shape in the ground state. A superdeformed shell-closure at Z=118 lends an additional binding and an extra stability to nuclei in this region. Consequently, it is predicted that the corresponding $Q_alpha$ values provide $alpha$-decay half-lives for heavier superheavy nuclei within the experimentally feasible conditions. The results are compared with those of macroscopic-microscopic approaches. A perspective of the difference in shell effects amongst various approaches is presented and its consequences on superheavy nuclei are discussed. | | Source: | arXiv, nucl-th/0409066 | | Services: | Forum | Review | PDF | Favorites | |
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