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Error Thresholds in Single-Peak Gaussian Distributed Fitness Landscapes

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分类：O561.3[理学—原子与分子物理;理学—物理] TN248.6[电子电信—物理电子学]
作者机构：[1]Institute of Nuclear Energy Safety Technology, Chinese Academy of Sciences, Hefei 230031, Anhui, China, [2]School of Physics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand, [3]Thailand Center of Excellence in Physics (ThEP), Commission on Higher Education, 328 Si Ayutthaya Road, Ratchathewi, Bangkok 10400, Thailand, [4]State Key Laboratory of Nuclear Physics and Technology (Peking University), Beijing 100871, China, [5]School of Physics, Shandong University, Jinan 250100, China, [6]China Institute of Atomic Energy, P.O. Box 275(10), Beijing 102413, China, [7]School of Physics and Nuclear Energy Engineering, Beihang University, Beo'ing 100191, China
相关基金：Supported by Suranaree University of Technology （No. 15/2553）, Major State Basic Research Development Program in China （No.2007CB815003）, National Natural Science Foundation of China （Nos. 10975190, 11065001, 10975019, 10675170, and 61067001） and Foundation of the Education Department of Jiangxi Province （No.GJJ12372）
相关项目：超形变带的带外衰变

关键词：磁旋转, 电子束能量, 投影壳模型, 高自旋态, 磁偶极子, E2跃迁, 能量范围, 时间间隔, In-beam γ-spectroscopy, Magnetic dipole band, Projected shell model

中文摘要：

High-spin states in 84 Rb have been studied by using the 70Zn(18O, p3n)84Rb reaction at beam energy of 75MeV. Three regular magnetic dipole bands including strong M1 and weak E2 transitions have been observed in this nucleus which shows the characteristic feature of magnetic rotation. These bands are interpreted in the projected shell model for the first time on the basis of the four-quasiparticle configuration of the type π(fp)π(g29/2)v(g9/2). It is shown that the calculated sequence lies roughly in the same energy range as the experimental one but the interval between neighboring levels is larger than the corresponding experimental value. We believe that a 4-quasiparticle band crossing with the 2-quasiparticle band will depress the energies of the states.

英文摘要：

High-spin states in 84Rb have been studied by using the ^70Zn（^18O, p3n）^84Rb reaction at beam energy of 75 MeV. Three regular magnetic dipole bands including strong M1 and weak E2 transitions have been observed in this nucleus which shows the characteristic feature of magnetic rotation. These bands are interpreted in the projected shell model for the first time on the basis of the four-quasiparticle configuration of the type π（fp） × π（g^29/2） × v（g9/2） . It is shown that the calculated sequence lies roughly in the same energy range as the experimental one but the interval between neighboring levels is larger than the corresponding experimental value. We believe that a 4-quasiparticle band crossing with the 2-quasiparticle band will depress the energies of the states.

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