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解析势能函数

解析势能函数的相关文献在1997年到2020年内共计80篇,主要集中在化学、物理学、数学 等领域,其中期刊论文79篇、会议论文1篇、专利文献23796篇;相关期刊23种,包括河西学院学报、鲁东大学学报(自然科学版)、哈尔滨师范大学自然科学学报等; 相关会议1种,包括中国核学会核材料分会2007年度学术交流会等;解析势能函数的相关文献由143位作者贡献,包括施德恒、朱正和、孙金锋等。

解析势能函数—发文量

期刊论文>

论文:79 占比:0.33%

会议论文>

论文:1 占比:0.00%

专利文献>

论文:23796 占比:99.66%

总计:23876篇

解析势能函数—发文趋势图

解析势能函数

-研究学者

  • 施德恒
  • 朱正和
  • 孙金锋
  • 杨传路
  • 杨向东
  • 程新路
  • 阮文
  • 张金平
  • 朱遵略
  • 罗文浪
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 詹杰; 樊群超; 付佳; 范志祥; 张春国
    • 摘要: 使用研究双核分子微观振动能量的变分代数法(variational algebraic method,VAM)计算获得NaH和CsH 2个分子电子基态的完全振动能谱;从这些精确的VAM完全振动能谱出发,利用变分代数能量自洽法(varia-tional algebraic energy consistent method,VAECM),通过调节参数λ确定NaH-X1∑+和CsH-X1∑+2个分子电子基态的解析势能函数.获得的势能曲线能准确地重复电子态在低激发振动区域已有的实验振动能级,同时在高激发振动离解区和渐近区也给出一个准确的振动物理行为,并正确地收敛于实验离解能.研究结果表明,所获得的VAM完全振动能谱和VAECM解析势能函数优于目前其他方法的研究结果.%The full vibrational energies of NaH and CsH molecule electronic ground states are calculated by using the variational algebraic method (VAM) established in our previous work.And then,accurate analytical potential energy function is determined by the variational algebraic energy consistent method (VAECM) with an adjustable parameter λ for each electronic state.The potential energy curves not only repeated known experimental vibrational energies well in low vibrational excited states,but also had a correct physical behavior in the region of the dissociation area,and correctly converged to the experimental dissociation energy.The results show that the VAECM analytic potential energy function is better than the research results of other methods for each electronic state in this work.
    • 曹恩; 刘爽; 宋玉志
    • 摘要: 利用多组态相互作用方法和aug—cc—PV(X+d)Z(X=T,Q)基组计算了LiS(^2II)、LiS^-(^1∑+)和LiS+(^3∑-)的势能,并考虑了零点能修正、核价相关和相对论效应.利用基组外推方法把能量外推到完备基组极限,得到了更加精确的能量.利用最小二乘法拟合这些能量点获得了解析的势能函数,计算得到了精确的光谱常数、振动能级和经典拐点.计算结果与实验和其它理论值符合得很好.
    • 张春国; 樊群超; 孙卫国; 范志祥; 张燚
    • 摘要: 在课题组前期建立的计算双核分子体系解析势能函数的代数能量自洽法(algebraic energy consist-ent method,AECM)的基础上,引入了经改进得到的精确研究双核分子完全振动能谱的变分代数法(varia-tional algebraic method,VAM),获得了计算双核分子体系精确解析势能函数的变分代数能量自洽法(varia-tional algebraic energy consistent method,VAECM)。基于有限的精确实验振动能谱数据,利用 VAECM方法研究了Li2分子13Δg,33Σ+g ,13Σ-g 和b3Πu 等4个电子态的完全振动能谱和解析势能函数。获得了各电子态包含高阶的振动光谱常数、完全振动能谱、振动力常数fn 和势能展开系数an ,并通过可调变分参数λ最终确定了 VAECM解析势能函数的具体表达形式。计算结果与其他方法的研究结果进行了比较,VAECM方法获得的振动能谱数据和势能解析表达形式能更好地描述这些电子态在渐近区和离解区的物理行为,消除了利用前期 AECM方法研究这些电子态在离解区出现的非物理势垒现象。%The full vibrational spectra especially those high-lying vibrational energies in the dissociation region of four specific electronic states 13Δg,33Σ+g ,13Σ-g and b3Πu have been obtained by using the improved variational algebraic method (VAM). The analytical potential energy functions (APEFs)of these electronic states are also determined with corresponding adj ustable parameterλby using the variational algebraic energy consistent method (VAECM)based on the VAM vibrational spectra.The full vibrational energies,vibrational spectroscopic constants,force constants fn,and expansion coefficients an of the VAECM potential are also tabulated for each electronic state in this study.The results show that the VAECM analytical potentials are superi-or to some other widely used analytical ones,and do not have the unphysical tiny barriers existing in the precious AECM potentials.
    • 廖建文; 杨传路
    • 摘要: 采用多参考组态相互作用方法和aug-cc-pV5Z基函数组计算了CN+分子11∑+,21∑+,13∑+和1 3Π电子态的势能曲线.利用MS势能函数拟合得到了相应的解析势能表达式.在此基础上求解CN+分子的核运动薛定谔方程,获得了全部振动和转动能级,并用Dunham系数展开式拟合出了光谱常数,与目前仅有的11∑+,21∑+态的文献报道结果进行了比较.结果可对航天尾气及工业过程光谱方法监控提供参考.
    • 袁丽; 樊群超; 孙卫国; 范志祥; 冯灏
    • 摘要: The analytical potential energy curves of stable diatomic electronic states are investigated based on the algebraic method (AM) and energy consistent method (ECM). The AM-ECM method is applied to 4 electronic states of 7Li2-23Σ+g , KH-X1Σ+, NaLi-X1Σ+ and NaLi-A1Σ+. The results show that the AM-ECM potentials are superior to some other analytical potentials, and can generate accurate analytical potential expressions of these electronic states in the molecular asymptotic and dissociation region.%基于计算双原子分子完全振动能谱及离解能的代数方法(algebraic method, AM)和研究双原子分子解析势能函数的能量自洽法(energy consistent method, ECM),建立了计算双核分子体系精确解析势能函数的代数-能量自洽法(AM-ECM)。应用AM-ECM方法研究了7Li2-23Σ+g , KH-X1Σ+, NaLi-X1Σ+和NaLi-A1Σ+电子态的解析势能表达形式,并与其他方法的研究结果进行了比较,获得了能正确描述这些电子态在渐近区和离解区的精确解析表达结果。
    • 曾晖; 赵俊
    • 摘要: 利用单双迭代耦合簇理论CCSD结合相关一致四重基组cc-pVQZ对SeN2基态的平衡结构和谐振频率进行了优化计算.计算结果表明:基态SeN2自由基分子稳定态为C2v构型,基态电子组态为X1A1,平衡核间距RSe-N =0.1691 nm, RN-N =0.1970 nm,αN-Se-N =71.289◦,离解能D e =4.78 eV.基态简正振动频率分别为:ν1=326.9288 cm-1,ν2=808.0161 cm-1以及ν3=948.3430 cm-1.对SeN基态和N2基态采用上述相同方法进行几何构型与谐振频率的计算并进行单点能扫描,使用Murrell-Sorbie函数进行最小二乘拟合得到其势能函数和光谱常数,通过和其他理论值以及实验值做比较,显示本文的计算工作达到了很高的精度.应用多体项展式理论导出了基态SeN2的全空间解析势能函数,其势能函数等值势能图准确再现了SeN2分子的结构特征和能量变化.%The coupled-cluster single-double (CCSD) theory in combination with the quadruple correlation-consistent basis set (cc-pVQZ) of Dunning and co-workers is employed to estimate the equilibrium geometry, dissociation energy and vibrational frequencies of the SeN2 radical. The computational results show that the ground state of SeN2 has C2v symmetry and its ground electronic state is X1A1. The equilibrium parameters of the structure are RSe-N=0.1691 nm, RN-N =0.1970 nm, αN-Se-N =71.289◦, and the dissociation energy is De =4.78 eV. The vibrational frequencies areν1 = 326.9288 cm-1, ν2 = 808.0161 cm-1, and ν3 = 948.3430 cm-1, respectively. The whole potential curves for the ground electronic states of SeN and N2 are further scanned using the above method, the potential energy functions and relevant spectroscopic constants are then obtained by least square fitting to the Murrell-Sorbie function. Compared with other theoretical results and the experimental values, our computational results are very accurate. Then the analytic potential energy function of SeN2 is derived by many-body expansion theory. The potential curves correctly describe the configurations and the dissociation energy for the SeN2 radical.
    • 李桂霞; 姜永超; 凌翠翠; 马红章; 李鹏
    • 摘要: 采用多组态准简并微扰理论对旋轨耦合作用下HF+离子的基态 X2Πi和第一激发态A2Σ+的性质进行了研究,得到了电子态X2Π3/2和2Π1/2的垂直跃迁能v[2Π1/2(v =0)→X2Π3/2(v =0)]=285.176 cm-1,以及电子态 X2Π3/2和2Π1/2的势能曲线;采用Murrell-Sorbie函数和最小二乘法拟合得到了这两个分裂电子态的解析势能函数;并在此基础上推导出了电子态X2Π3/2,2Π1/2和A2Σ+的光谱常数,而且首次给出了分裂电子态X2Π3/2和2Π1/2的解析势能函数和光谱数据.%The characteristics of ground state X2Πi and the first excited state A2Σ+ of HF+ under spin-orbit coupling are studied by using the multi-configuration quasi-degenerate perturbation theory. The vertical excited energy is v[2Π1/2 (v =0) → X2Π3/2 (v = 0)] = 285.176 cm-1, and the potential energy curves of the splitting electronic states X2Π3/2, 2Π1/2 of X2Πi are obtained. The analytical potential functions of these states are derived by employing the Murrell-Sorbie function (M-S) and the least-square fitting method, and then the spectroscopic constants for X2Π3/2, 2Π1/2 and A2Σ+ are derived from the M-S function. All the spectroscopic data and the analytical potential functions for states X2Π3/2 and 2Π1/2 are given for the first time in our calculation.
    • 刘国跃; 廖碧涛; 吴英
    • 摘要: 采用双原子分子离子XY+的能量自洽法(Energy-consistent-method for ion XY+,ECMI)研究了氢化铝离子AlH+激发态A2Ⅱ的解析势能函数,并与采用中性双原子分子势能函数Morse势和Huxley-Murrell-Sorbie(HMS)势分析该离子该电子态的势能行为的结果、基于实验的Rydberg-Klein-Ress(RKR)数据和MCSCF方法的理论研究结果进行了比较.结果表明,由ECMI方法得到的解析势能函数ECMI势明显优于Morse势和HMS势的表现及MCSCF方法的结果,与RKR数据符合得很好,并能得到RKR数据缺乏的离解区和渐近区数据以及正确的离解极限,而正确的全程势能数据对研究各种散射问题都是非常必要的.
    • 洪文钦; 胡爱荣; 阮文
    • 摘要: 采用密度泛函B3LYP方法在6-311+g(d,p)基组水平上对MgNi、Mg2和Mg2 Ni分子的各种可能的结构进行优化,得到了它们的几何构型、平衡核间距、离解能和谐振频率.采用最小二乘法拟合MgNi和Mg2分子的Murrell-Sorbie势能函数,在此基础上导出光谱数据和力常数.通过多体项展式理论导出Mg2 Ni分子的解析势能函数,并绘出了Mg2 Ni分子的等值势能面,其等值势能面正确地反应了基态Mg2Ni分子的平衡构型特征.
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