Comparative study of nuclear masses in the relativistic mean-field model  

作　　者：HUA XueMin HENG TaiHua NIU ZhongMing SUN BaoHua GUO JianYou 

机构地区：[1]School of Physics and Material Science,Anhui University,Hefei 230039,China [2]School of Physics and Nuclear Energy Engineering,Beihang University,Beijing 100191,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第12期2414-2419,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the 211 Project of Anhui University (Grant No.02303319-33190135);the Key Research Foundation of Education Ministry of Anhui Province of China(Grant No.KJ2012A021);the Program for New Century Excellent Talents in University of Ministry of Education of China(Grant No.NCET-09-0031);the National Natural Science Foundation of China(Grant Nos.10975008,11105010,11035007, 11128510,11175001 and 11205004)

摘　　要：With experimental masses updated from AME11,the predictive power of relativistic mean-field(RMF) mass model is carefully examined and compared with HFB-17,FRDM,WS*,and DZ28 mass models.In the relativistic mean-field model,the calculation with the PC-PK1 has improved significantly in describing masses compared to the TMA,especially for the neutron-deficient nuclei.The corresponding rms deviation with respect to the known masses falls to 1.4 MeV.Furthermore,it is found that the RMF mass model better describes the nuclei with large deformations.The rms deviation for nuclei with the absolute value of quadrupole deformation parameter greater than 0.25 falls to 0.93,crossing the 1 MeV accuracy threshold for the PC-PK1,which may indicate the new model is more suitable for those largely-deformed nuclei.In addition,the necessity of new high-precision experimental data to evaluate and develop the nuclear mass models is emphasized as well.With experimental masses updated from AME11,the predictive power of relativistic mean-field（RMF） mass model is carefully examined and compared with HFB-17,FRDM,WS＊,and DZ28 mass models.In the relativistic mean-field model,the calculation with the PC-PK1 has improved significantly in describing masses compared to the TMA,especially for the neutron-deficient nuclei.The corresponding rms deviation with respect to the known masses falls to 1.4 MeV.Furthermore,it is found that the RMF mass model better describes the nuclei with large deformations.The rms deviation for nuclei with the absolute value of quadrupole deformation parameter greater than 0.25 falls to 0.93,crossing the 1 MeV accuracy threshold for the PC-PK1,which may indicate the new model is more suitable for those largely-deformed nuclei.In addition,the necessity of new high-precision experimental data to evaluate and develop the nuclear mass models is emphasized as well.

关 键 词：nuclear masses relativistic mean-field model rotational correction 

分 类 号：O571.6[理学—粒子物理与原子核物理] TP311.5[理学—物理]