Coexistence of normal, super-, and hyper-deformation in nuclei: A study with angular momentum projection method  

作　　者：SUN Yang1,2, ZHANG JingYe3, LONG GuiLu4,5 & WU ChengLi6,7 1 Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 2 Joint Institute for Nuclear Astrophysics, University of Notre Dame, Notre Dame, Indiana 46556, USA 3 Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA 4 Department of Physics, Tsinghua University, Beijing 100084, China 5 Center of Nuclear Theory, Lanzhou National Laboratory of Heavy Ion Accelerator, Lanzhou 730000, China 6 Department of Physics, Xiamen University, Xiamen 361005, China 7 Department of Physics, Chung Yuan Christian University, Chung-Li, Taiwan 32023, China 

出　　处：《Chinese Science Bulletin》2009年第3期358-363,共6页

基　　金：Supported by the National Basic Research Program of China (Grant No. 2007CB815005);National Science Foundation of U.S. (Grant No. PHY-0216783) (Y.S.);Department of Energy of U.S. (Grant No. DE-FG02-96ER40983) (J.-Y.Z.);National Natural Science Foundation of China (Grant No. 10325521) (G.L.L.)

摘　　要：Angular-momentum-projected energy surface calculations for A ≈ 110 nuclei indicate three distinct energy minima occurring at different angular-momenta. These correspond to normal, super-, and hy- per-deformed shapes coexisting in one nucleus. 110Pd is studied in detail, with a quantitative prediction on super- and hyper-deformed spectra by the Projected Shell Model calculation. It is found that several other neighboring nuclei in the A-110 mass region, with the neutron number around 64, also exhibit clear super- and hyper-deformation minima in the projected calculation.Angular-momentum-projected energy surface calculations for A ≈ 110 nuclei indicate three distinct energy minima occurring at different angular-momenta. These correspond to normal, super-, and hyper-deformed shapes coexisting in one nucleus. ^110Pd is studied in detail, with a quantitative prediction on super- and hyper-deformed spectra by the Projected Shell Model calculation. It is found that several other neighboring nuclei in the A-110 mass region, with the neutron number around 64, also exhibit clear super- and hyper-deformation minima in the projected calculation.

关 键 词：原子核 光谱 角动量 能量 

分 类 号：O571[理学—粒子物理与原子核物理]