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Convergence for Imaginary Time Step evolution in the Fermi and Dirac seas

Science china(phys.cs,Mechanics & Astronomy) 2010年第2期53卷 327-330页

作者： LI FangQiong1,ZHANG Ying2.& MENG Jie2.3,4 1Guizhou university for Nationalities,Guiyang 55002.,china {2.,school of phys.cs,peking university,beijing 100871,china 3school of phys.cs and nucl.ar Energy Engineering,Beihang university,{12. 100191,china 4Department of phys.cs,university of Stellenbosch,Stellenbosch,South Africa 1. Guizhou university for Nationalities Guiyang 550025 China2. State Key Lab Nucl. Phys. & Tech. School of Physics Peking University Beijing 100871 China3. School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China4. Department of Physics University of Stellenbosch Stellenbosch South Africa

The convergence for the Imaginary Time Step (ITS) evolution with time step is investigated by performing the ITS evolution for the Schrdinger-like equation and the charge-conjugate Schrdinger-like equation deduced from Dirac equation for the single proton levels of 12. in both the Fermi and Dirac seas. For the guaranteed convergence of the ITS evolution to the "exact" results,the time step should be smaller than a "critical" time step Δtc for a given single-particle level. The "critical" time step Δtc is more sensitive to the quantum numbers |κ| than to the energy of the single-particle level. For the single-particle levels with the same κ,their "critical" time steps are in the same order. For the single-particle levels with similar energy,a relatively small (large) "critical" time step for larger (smaller) |κ| is needed. These conclusions can be used in the future self-consistent calculation to optimize the evolution procedure.

关键词： Dirac equation Schrdinger-like equation Imaginary Time Step method convergence

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Chiral doublet bands in odd-A nucl.i 103,105Rh

Chiral doublet bands in odd-A nuclei 103,105Rh

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第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： Bin Qi~(1 1)) Shou Yu Wang~1 Shuang Quan Zhang~2.Jie Meng~2.1(school of Space Science and phys.cs,Shandong {2. at Weihai,Weihai 2.42.9,china) 2.school of phys.cs,and State-key lab.nucl.phys.& tech.,{12.,beijing 100871,china)

Spontaneous chiral symmetry breaking is a phenomenon of general interest in chemistry,biology and particle *** the pioneering work of nucl.ar chirality in 1997,much effort has been devoted to further explore this interesting *** the observation of chiral doublet bands in N = 75 isotones, more candidates have been reported over more than 2. nucl.i experimentally in A～100,130 and 190 mass regions including odd-odd,odd-A and even-even nucl.i.

关键词： nucl.ar chirality odd-A nucl.i many-particle many-hole configuration particle rotor model

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Level structure of 116Sb

Level structure of 116Sb

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第十三届全国核结构研讨会暨第九次全国“核结构与量子力学”专题讨论会

作者： D.P.Sun,~(1 1)) S.Y.Wang,~1 B.Qi,~1 L.W.Duan,~1 G.Wang,~1 X.L.Ren,~1 B.T.Duan,~1 X.X.Zhu,~1 F.Z.Lv,~1 C.Liu,~1 C.J.Xu,~1 H.Hua,~2.S.Q.Zhang,~2.Z.Y.Li,~2.J.M.Yao,~2.L.H.Zhu~3 X.G.Wu,~3 G.S.Li,~3 Y.Liu,~3 X.Q.Li,~3 Y.Zheng,~3 L.L.Wang,~3 L.Wang,~3 1(school of Space Science and phys.cs,Shandong {2. at Weihai,Weihai 2.42.9,china) 2.school of phys.cs,and State-key lab.nucl.phys.& tech.,{12.,beijing 100871,china) 3(china Institute of Atomic Energy,beijing 102.13,china)

The odd-odd nucl.us Sb was populated using the reaction Cd（Li,5n） at a beam energy of 48 *** previously known rotational bands have been observed up to high spins.A new△I = 1 band were identified,and were suggested as a magnetic rotational *** rotor model calculations show reasonably good agreement with the *** the spherical discrete levels were also *** 30 newγ—rays were added in the level scheme of Sb.

关键词： odd-odd nucl.us magnetic rotational band level scheme

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