Analytical description of shape transition in nuclear alternating parity bands  

作　　者：E.V.Mardyban T.M.Shneidman E.A.Kolganova R.V.Jolos S.-G.Zhou E.V.Mardyban;T.M.Shneidman;E.A.Kolganova;R.V.Jolos;周善贵(Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research;Dubna State University;Kazan Federal University;CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences;School of Physical Sciences,University of Chinese Academy of Sciences;Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator;Synergetic Innovation Center for Quantum Effects and Application, Hunan Normal University)

机构地区：[1]Bogoliubov Laboratory of Theoretical Physics,Joint Institute for Nuclear Research,Dubna 141980,Russia [2]Dubna State University,Dubna 141980,Russia [3]Kazan Federal University,Kazan 420008,Russia [4]CAS Key Laboratory of Theoretical Physics,Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190,China [5]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [6]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000,China [7]Synergetic Innovation Center for Quantum Effects and Application,Hunan Normal University,Changsha 410081,China

出　　处：《Chinese Physics C》2018年第12期112-122,共11页中国物理C（英文版）

基　　金：Supported by the RFBR(Moscow)(16-02-00068A);the Russian Government Subsidy Program of the Competitive Growth of Kazan Federal University;partly supported by the National Key R&D Program of China(2018YFA0404402);the NSF of China(11525524,11621131001,11647601,11747601,11711540016);the CAS Key Research Program of Frontier Sciences(QYZDB-SSWSYS013);the IAEA CRP“F41033”;the HPC Cluster of KLTP/ITP-CAS;the Supercomputing Center,CNIC of CAS

摘　　要：The angular momentum dependencies parity bands of heavy nuclei have been analyzed of parity splitting and electric dipole transitions in the alternating It is shown that these dependencies can be treated in a universal manner with a single critical angular momentum parameter, which characterizes phase transition from octupole vibrations to the stable octupole deformation. Using the simple but useful model of axially-symmetric reflection- asymmetric mode, the analytical expressions for parity splitting and electric dipole transitional moment have been obtained. The findings are in good agreement with the experimental data for various isotopes of Ra, Th, U, and Pu.The angular momentum dependencies parity bands of heavy nuclei have been analyzed of parity splitting and electric dipole transitions in the alternating It is shown that these dependencies can be treated in a universal manner with a single critical angular momentum parameter, which characterizes phase transition from octupole vibrations to the stable octupole deformation. Using the simple but useful model of axially-symmetric reflection- asymmetric mode, the analytical expressions for parity splitting and electric dipole transitional moment have been obtained. The findings are in good agreement with the experimental data for various isotopes of Ra, Th, U, and Pu.

关 键 词：octupole deformation phase transition angular momentum 

分 类 号：O571[理学—粒子物理与原子核物理]