Well-Deformed Oblate K Isomers Induced by Oblate Intruder States

• 来源期刊: 中国物理快报（英文版）
• 学科: 物理学
• 年，卷（期）: 2001,（6）
• 页码范围: 750-752
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

With configuration-constrained potential energy surfaces, it has been found that the neutron-deficient Z ≈ 82nuclei can have well-deformed oblate K isomers which are formed by exciting quasiparticles to the proton i13/2and h9/2 oblate intruder orbitals. To achieve the configuration-constrained calculations, the maximum-overlapmethod of wavefunctions is proposed. In the present calculations of quasiparticle states, quadrupole pairings areincluded. The observed Kπ ＝ 11- isomer in 188Pb is confirmed to be oblately deformed, with energy consistentwith the experiment. Some low-lying oblate isomeric states are predicted for 187 Tl.