A possible proton pygmy resonance in ^(17)Ne  

作　　者：MA ZhongYu1,2 & TIAN Yuan1 1 China Institute of Atomic Energy, Beijing 102413, China 2 Center of Theoretical Nuclear Physics, National Laboratory of Heavy Collision, Lanzhou 730000, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第S1期49-52,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10775183, 10875150 and 11075213);the National Basic Research Program of China (Grant No. 2007CB815000)

摘　　要：The low-lying electric dipole strengths in proton-rich nuclei 17F and 17Ne, which can be produced at HIRFL-CSR in Lanzhou, are investigated. In the framework of the covariant density functional theory the self-consistent relativistic Hartree Bogoliubov model and the relativistic quasiparticle random phase approximation with the NL3 parameter set and Gogny pairing interaction are adopted in the calculations. A pronounced dipole peak appears below 10 MeV in17Ne, but does not occur in 17F. The prop erties of this low-lying E1 excitation in 17Ne are studied, which may correspond to a proton pygmy resonance with different characteristics from those of giant dipole resonance.The low-lying electric dipole strengths in proton-rich nuclei 17F and 17Ne, which can be produced at HIRFL-CSR in Lanzhou, are investigated. In the framework of the covariant density functional theory the self-consistent relativistic Hartree Bogoliubov model and the relativistic quasiparticle random phase approximation with the NL3 parameter set and Gogny pairing interaction are adopted in the calculations. A pronounced dipole peak appears below 10 MeV in17Ne, but does not occur in 17F. The prop erties of this low-lying E1 excitation in 17Ne are studied, which may correspond to a proton pygmy resonance with different characteristics from those of giant dipole resonance.

关 键 词：PROTON pygmy RESONANCE RELATIVISTIC Hartree-Bogoliubov model RELATIVISTIC QUASIPARTICLE random phase APPROXIMATION 

分 类 号：O571[理学—粒子物理与原子核物理]