采用单双激发运动方程耦合簇(EOM-CCSD)以及多个包含迭代三激发在内的运动方程耦合簇变体(EOM-CCSDT-i,i=1a,1b,2,3和EOM-CC3)计算了HOF价层垂直电离势(VIP).在EOM-CCSD水平上优化出各价层电离态结构,得到绝热电离势(AIP),进一步计算出...采用单双激发运动方程耦合簇(EOM-CCSD)以及多个包含迭代三激发在内的运动方程耦合簇变体(EOM-CCSDT-i,i=1a,1b,2,3和EOM-CC3)计算了HOF价层垂直电离势(VIP).在EOM-CCSD水平上优化出各价层电离态结构,得到绝热电离势(AIP),进一步计算出谐振频率.同时对称匹配簇组态相互作用(SAC/SAC-CI)也被应用到部分计算.结果显示:EOM-CC3、EOM-CCSDT-3计算的VIP接近于全三激发运动方程耦合簇EOM-CCSDT结果;EOM-CC与SAC-CI值基本一致;同时发现HOF光电子能谱实验在2A'态指认上有误并重新进行归属.HOF的第三VIP应为16.9 e V,而非光电子能谱实验测得的16.0 e V.展开更多
By correcting some primary parameters in the semi-classical Deutsch-Mark （DM） formula, this paper calculates the absolute single electron-impact ionization cross sections of atoms N, Cu, As, Se, Sn, Sb, Te, I and Pb...By correcting some primary parameters in the semi-classical Deutsch-Mark （DM） formula, this paper calculates the absolute single electron-impact ionization cross sections of atoms N, Cu, As, Se, Sn, Sb, Te, I and Pb from threshold to 10000 eV. The calculated cross sections are compared with available experimental data and other theoretical results. An excellent agreement was achieved between the calculated and measured cross sections for these atoms over a wide range of impact energies.展开更多
文摘采用单双激发运动方程耦合簇(EOM-CCSD)以及多个包含迭代三激发在内的运动方程耦合簇变体(EOM-CCSDT-i,i=1a,1b,2,3和EOM-CC3)计算了HOF价层垂直电离势(VIP).在EOM-CCSD水平上优化出各价层电离态结构,得到绝热电离势(AIP),进一步计算出谐振频率.同时对称匹配簇组态相互作用(SAC/SAC-CI)也被应用到部分计算.结果显示:EOM-CC3、EOM-CCSDT-3计算的VIP接近于全三激发运动方程耦合簇EOM-CCSDT结果;EOM-CC与SAC-CI值基本一致;同时发现HOF光电子能谱实验在2A'态指认上有误并重新进行归属.HOF的第三VIP应为16.9 e V,而非光电子能谱实验测得的16.0 e V.
基金supported by the National Natural Science Foundation of China (Grant No 10676025)
文摘By correcting some primary parameters in the semi-classical Deutsch-Mark （DM） formula, this paper calculates the absolute single electron-impact ionization cross sections of atoms N, Cu, As, Se, Sn, Sb, Te, I and Pb from threshold to 10000 eV. The calculated cross sections are compared with available experimental data and other theoretical results. An excellent agreement was achieved between the calculated and measured cross sections for these atoms over a wide range of impact energies.
