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国家自然科学基金(11064012)

作品数:6 被引量:6H指数:2
相关作者:董晨钟张义钊符彦飙马新泽张国鼎更多>>
相关机构:西北师范大学昌吉学院电子工程学院更多>>
发文基金:国家自然科学基金国家教育部博士点基金甘肃省自然科学基金更多>>
相关领域:理学电子电信更多>>

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Dielectronic Recombination of Br-Like Tungsten Ions
2014年
Accurate data for dielectronic recombination of tungsten ions are essential in the modeling of tungsten impurity transport and radiative power loss in International Thermonuclear Experimental Reactor (ITER). Theoretical calculations have been made for dielectronic recombi- nation (DR) rate coefficients of Br-like tungsten ions using a flexible relativistic atomic code (FAC) from i eV to 50 keV. Level-by-level calculations are carried out for evaluating the contributions to DR through all the relevant Kr-like tungsten ions autoionizing inner-shell excited configuration complexes: (3s23p63d10)-14s24p5nlntl' (n = 4-5, n' = 4-100,l' = 0-8), (4s24pS)-lnln'l' (n = 4-6, n' = 4-100, l' = 0-12). Comparison of the rate coefficients for 3s, 3p, 3d, 4s and 4p subshell excitations shows that the 4p subshell excitation dominates over the whole temperature region, 4s subshell excitation at low temperature and 3p, 3d subshell excitations at high temperature can not be neglected. In order to facilitate simple applications, the total DR rate coefficient, △n = 0,1 and 2 core excitations DR rate coefficients are fitted to an empirical formula.
李麦娟符彦飙苏茂根董晨钟Koike FUMIHIRO
A Comparative Study of the Laser Induced Breakdown Spectroscopy in Single- and Collinear Double-Pulse Laser Geometry被引量:2
2014年
Two Q-switched Nd:YAG lasers at 1064 nm wavelength have been employed to produce plasmas on aluminum-based alloy in single- and collinear double-pulse laser induced breakdown spectroscopy (LIBS). Time resolved technique was used for detecting emission sig- nal by spectrometer equipped with ICCD detector. The intensity calibration of spectral response was performed by using deuterium and tungsten halogen lamps. Time evolution of the plasma temperature and electron number density was investigated in single- and collinear double-pulse experiments. Based on the investigation of plasma parameters, the emission signal enhancement mechanism was discussed qualitatively.
孙对兄苏茂根董晨钟温冠宏
高电荷态锡离子极真空紫外波段自吸收光谱轮廓的细致分析被引量:1
2017年
等离子体动力学模拟是一种非常有效的等离子体状态诊断和光谱分析方法,已被广泛应用于激光等离子体光谱的解释和演化分析中.本文基于流体动力学方程和辐射输运方程,并结合稳态的碰撞辐射模型,提出了一种简化的能够分析模拟中高Z元素高电荷态离子极真空紫外(Extreme Ultraviolet,EUV)波段光谱的辐射流体动力学模型,并成功应用于激光产生的锡等离子体EUV光谱的分析和模拟.结果表明,理论模拟光谱与激光功率密度为1.90×10^(11)?W/cm^2的实验光谱之间具有良好的一致性.通过比较Sn^(7+)–Sn^(11+)离子的4d-4f,4p-4d和4d-5p,5f跃迁阵列的发射轮廓和自吸收轮廓,明确了不透明度效应对发射光谱轮廓的影响,成功解释了13.5?nm附近自吸收带和自吸收峰的成因.相关研究预期能够为极真空紫外辐射在光刻、计量、生物成像等领域的应用研究提供参考.
苏茂根敏琦曹世权孙对兄董晨钟
关键词:激光等离子体高电荷态离子
Theoretical study on K,L,and M X-ray transition energies and rates of neptunium and its ions被引量:1
2014年
The transition energies and electric dipole (El) transition rates of the K, L, and M lines in neutral Np have been theoretically determined from the MultiConfiguration Dirac-Fock (MCDF) method. In the calculations, the contributions from Breit interaction and quantum electrodynamics (QED) effects (vacuum polarization and self-energy), as well as nu- clear finite mass and volume effects, are taken into account. The calculated transition energies and rates are found to be in good agreement with other experimental and theoretical results. The accuracy of the results is estimated and discussed. Furthermore, we calculated the transition energies of the same lines radiating from the decaying transitions of the K-, L-, and M-shell hole states of Np ions with the charge states Np1+ to Np6+ for the first time. We found that for a specific line, the corresponding transition energies relating to all the Np ions are almost the same; it means the outermost electrons have a very small influence on the inner-shell transition processes.
Ismail Abdalla Saber董晨钟王向丽周卫东武中文
Ga原子亚稳态超精细结构常数及其同位素核矩的理论计算
2012年
在相对论多组态Dirac-Fock(MCDF)论基础上,通过系统考虑电子关联效应以及相对论效应,获了与最近实验值符合很好71Ga亚稳态4s24p2P3/2超精细结构常数,并进而到了71Ga的磁偶极矩和电四极矩.在忽略场移效应对Ga原子亚稳态超精细结构影响情况下,进一步给出了Ga原子其他同位素67,69,72-79,81Ga磁偶极矩和电四极矩,与已有实验结果相比,有着很好一致性.
汪青敏董晨钟RITZSCHE Stephan
关键词:超精细结构常数电四极矩电子关联
W^44+离子双电子复合速率系数的理论研究被引量:2
2013年
利用全相对论组态相互作用方法,详细研究了W44+离子从基组态3s23p63d104s2俘获一个电子形成双激发态(3s23p63d104s2)1nln′l′(n=4~6,n′=4~7)的双电子复合(DR)过程。通过比较不同壳层电子激发的DR速率系数,得知4s电子激发和3d电子激发的DR速率系数分别在低温和中高温度时给出了主要贡献,得到了主要的电子激发DR通道。在1 eV~50 keV温度范围内,计算了n=4~18的DR速率系数,并外推到了n=100,得到总DR速率系数。比较总DR速率系数、三体复合(TBR)以及辐射复合(RR)速率系数,结果表明DR速率系数在研究的温度范围内远大于TBR和RR速率系数,其将明显地影响ITER等离子体的电离平衡和离化态布居。
马新泽符彦飙李麦娟张国鼎张义钊董晨钟
关键词:双电子复合
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