Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction cal- culations, E2 and M1 transition probabilities of 2p3 4S3/2-2p3 2D3/2,5/2 are investigated in the nitro...Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction cal- culations, E2 and M1 transition probabilities of 2p3 4S3/2-2p3 2D3/2,5/2 are investigated in the nitrogen-like sequence with 7 〈 Z 〈 16. The contributions of the electron correlations, Breit interaction, and the quantum electrodynamic （QED） effects on the transition properties are analyzed. The present results can be used for diagnosing plasma. In addition, several N-like ions can also be recommended as a promising candidate for a highly charged ion （HCI） clock with a quality factor （Q） of trnnsition as hitch as 1020.展开更多
合成了含Co ,Cu和Ni的M /Mg Al HTL类水滑石 ,并将其焙烧产物用于N2 O催化分解反应 .实验结果表明 ,Co/Mg Al HTL对N2 O分解反应的催化活性明显高于Cu/Mg Al HTL和Ni/Mg Al HTL的活性 .在保持样品中Al含量不变的条件下 ,催化活性随着Co...合成了含Co ,Cu和Ni的M /Mg Al HTL类水滑石 ,并将其焙烧产物用于N2 O催化分解反应 .实验结果表明 ,Co/Mg Al HTL对N2 O分解反应的催化活性明显高于Cu/Mg Al HTL和Ni/Mg Al HTL的活性 .在保持样品中Al含量不变的条件下 ,催化活性随着Co含量的增加及Mg含量的减少而升高 ,各催化剂的活性顺序为 :Co/Al HTL >Co/Mg Al HTL >Cu/Mg Al HTL >Ni/Mg Al HTL .在此基础上 ,进一步考察了Co/Al HTL中Co/Al原子比调变对催化剂活性的影响 .对含Co类水滑石及其焙烧产物进行了XRF ,XRD和N2 O TPD表征 .结果表明 ,含Co类水滑石具有典型的水滑石结构 ,其高温焙烧产物都含尖晶石相 .由于尖晶石相中Co O Al活性中心的作用 ,含Co类水滑石对N2 O分解反应表现出较高的催化活性 .随着Co/Al原子比的增大 ,含Co类水滑石焙烧产物的尖晶石相特征更加突出 ,Co O Al活性中心数目随之增多 ,催化剂的活性也相应升高 .展开更多
利用微波电子回旋共振化学气相沉积技术制备了不同氮掺杂量的类金刚石(DLC)薄膜,采用俄歇电子能谱仪、R am an光谱仪和Hys itron型纳米力学测试系统对掺氮类金刚石薄膜的化学成分和结构、纳米力学及其纳米摩擦特性进行研究.结果表明:反...利用微波电子回旋共振化学气相沉积技术制备了不同氮掺杂量的类金刚石(DLC)薄膜,采用俄歇电子能谱仪、R am an光谱仪和Hys itron型纳米力学测试系统对掺氮类金刚石薄膜的化学成分和结构、纳米力学及其纳米摩擦特性进行研究.结果表明:反应气体中氮气流量比例越大,类金刚石薄膜中的氮含量越高;随着薄膜中氮含量增加,掺氮类金刚石薄膜中sp3比例下降,sp2比例明显增加,而薄膜的纳米力学性能如纳米硬度和弹性模量明显下降;纳米划擦试验中的划痕深度与薄膜中氮含量有关,当载荷相同时,氮含量越高,所对应的划痕深度越深;名义摩擦系数(LF/NF)随着载荷增加而增大;当载荷相同时,摩擦系数与沉积膜中的氮含量无关.展开更多
Theoretical calculations of the energy levels and magnetic dipole transition parameters for the 1s^(2)2s^(2)2p^(3) and 1s^(2)2p^(5) configurations of nitrogen isoelectronic sequence with Z=21-30 are performed using mu...Theoretical calculations of the energy levels and magnetic dipole transition parameters for the 1s^(2)2s^(2)2p^(3) and 1s^(2)2p^(5) configurations of nitrogen isoelectronic sequence with Z=21-30 are performed using multi-congfiguration Dirac-Fock(MCDF)method.Based on the relativistic computational code GRASP2k compiled within the framework of MCDF method,the electron correlations,Breit interaction and QED effects are well treated in detail.The energy levels,line strengths and transition rates of magnetic dipole transition are obtained and compared with the experimental data avail-able.For most cases,good agreements are achieved and the relative differences of them are less than 0.114%,8.43% and 9.80%,respectively.The scaling laws of the fine structure splitting and transition rate are obtained on the isoelec-tronic sequence and the corresponding physical mechanisms are discussed.The data sets for tables are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00022.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11604385 and 91436103)
文摘Based on relativistic wave functions from multiconfiguration Dirac-Hartree-Fock and configuration interaction cal- culations, E2 and M1 transition probabilities of 2p3 4S3/2-2p3 2D3/2,5/2 are investigated in the nitrogen-like sequence with 7 〈 Z 〈 16. The contributions of the electron correlations, Breit interaction, and the quantum electrodynamic （QED） effects on the transition properties are analyzed. The present results can be used for diagnosing plasma. In addition, several N-like ions can also be recommended as a promising candidate for a highly charged ion （HCI） clock with a quality factor （Q） of trnnsition as hitch as 1020.
文摘利用微波电子回旋共振化学气相沉积技术制备了不同氮掺杂量的类金刚石(DLC)薄膜,采用俄歇电子能谱仪、R am an光谱仪和Hys itron型纳米力学测试系统对掺氮类金刚石薄膜的化学成分和结构、纳米力学及其纳米摩擦特性进行研究.结果表明:反应气体中氮气流量比例越大,类金刚石薄膜中的氮含量越高;随着薄膜中氮含量增加,掺氮类金刚石薄膜中sp3比例下降,sp2比例明显增加,而薄膜的纳米力学性能如纳米硬度和弹性模量明显下降;纳米划擦试验中的划痕深度与薄膜中氮含量有关,当载荷相同时,氮含量越高,所对应的划痕深度越深;名义摩擦系数(LF/NF)随着载荷增加而增大;当载荷相同时,摩擦系数与沉积膜中的氮含量无关.
基金Project supported by the National Natural Science Foundation of China(Grant No.12175096)。
文摘Theoretical calculations of the energy levels and magnetic dipole transition parameters for the 1s^(2)2s^(2)2p^(3) and 1s^(2)2p^(5) configurations of nitrogen isoelectronic sequence with Z=21-30 are performed using multi-congfiguration Dirac-Fock(MCDF)method.Based on the relativistic computational code GRASP2k compiled within the framework of MCDF method,the electron correlations,Breit interaction and QED effects are well treated in detail.The energy levels,line strengths and transition rates of magnetic dipole transition are obtained and compared with the experimental data avail-able.For most cases,good agreements are achieved and the relative differences of them are less than 0.114%,8.43% and 9.80%,respectively.The scaling laws of the fine structure splitting and transition rate are obtained on the isoelec-tronic sequence and the corresponding physical mechanisms are discussed.The data sets for tables are openly available at https://www.doi.org/10.57760/sciencedb.j00113.00022.
