2003/10/14 by L. S. Geng, Li‐Sheng Geng, H. Toki +2 · 2 citations
Physics and Astronomy · #Astronomical and nuclear sciences #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1103/physrevc.68.061303
published as Phys.Rev. C68 (2003) 061303 · 17 pages, 5 figures
arxiv created 2003/10/14 · openalex publication_date 2003/12/31 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
In the recent experiments designed to synthesize the element 115 in the 243Am+48Ca reaction at Dubna in Russia, three similar decay chains consisting of five consecutive \ensuremathα decays and another different decay chain of four consecutive \ensuremathα decays are detected, and the decay properties of these synthesized nuclei are claimed to be consistent with consecutive \ensuremathα decays originating from the parent isotopes of the new element 115, 288115 and 287115, respectively. Here in the present work, the recently developed deformed relativistic mean field+BCS method with a density-independent \ensuremathδ function interaction in the pairing channel is applied to the analysis of these newly synthesized superheavy nuclei. The calculated \ensuremathα-decay energies and half-lives agree well with the experimental values and with those of the macroscopic-microscopic finite-range droplet model with folded-Yukawa single-particle potentials and Yukawa-plus-exponential model with Woods-Saxon single-particle potentials. In the mean field Lagrangian, the TMA parameter set is used. Particular emphasis is laid on the influence to both the ground-state properties and energy surfaces introduced by different treatments of pairing. Two different effective interactions in the particle-particle channel, i.e., the constant pairing and the density-independent \ensuremathδ-function interaction, together with the blocking effect are discussed in detail.