ICP—AES初级专家系统中的谱线模拟

本文阐述了ＩＣＰ－ＡＥＳ初级专家系统中谱线模拟的理论基础，模拟了Ｃａ，Ｍｇ和Ａｌ在ＬＴＥ和ｎｏｎ－ＬＴＥ情况下的离子线与原子线，证明在ｎｏｎ－ＬＴＥ的条件下，离子线与原子线的强度比增强了，比ＬＴＤ条件下的结果更接近实际扫描谱图，本研究模拟了Ｃａ和Ｍｇ离子线的跃迁上能级能量对离子线强度的影响。     

ICP-AES法测定KDP晶体及其培养液中的微量元素

用ＩＣＰ－ＡＥＳ法测定ＫＤＰ晶体及其培养液中微量的Ｆｅ、Ｃｒ、Ｍｎ、Ｃａ、Ｍｇ、Ａｌ、Ｓｒ、Ｂａ，并对ＫＤＰ基体对被测元素谱线强度的影响进行考察。以Ｓｃ作内标，方法简便，可获得满意的分析结果。     

ICP—AES测定核纯海绵锆中17个杂质元素方法的研究

应用ＩＣＰ－ＡＥＳ法，对核纯海绵锆中１７个杂质元素的测定进行了试验研究。取样量１００ｍｇ时，Ａｌ、Ｃａ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｍｏ、Ｎｉ、Ｐｂ、Ｓｎ、Ｔａ、Ｔｉ、Ｖ、Ｙ和Ｚｎ的测定范围是１０μｇ／ｇ－３２００μｇ／ｇ。回收率为９５．２％－１０６．５％。     

ICP－AES法分析水质的探讨

本文用ＩＣＰ－ＡＥＳ（电感耦合等离子体－原子发射光谱法）测定水中Ａｌ、Ｂ、Ｂａ、Ｂｅ、Ｃａ、Ｃｄ、Ｃｏ、Ｃｒ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｏ、Ｍｎ、Ｎｉ、Ｐｂ、Ｓｒ、Ｖ、Ｚｎ等１８种微量元素。方法简便、快速，只将样品简单酸化，即可测定。方法检出限为０．０００５－０．５μｇ／ｍＬ。相对标准偏差＜１８％     

Ag／YB12Cu3O7—x,Al／YBa2Cu3O7—x界面特性分析

利用电学测量方法结合二次离子质谱（ＳＩＭＳ）技术对金属Ａｇ与Ａｌ与ＹＢａ２Ｃｕ３Ｏ７－ｘ（ＹＢＣＯ）超导薄膜接触界面电学性质和扩散特征进行了测试分析，分析结果显示由于Ａｇ和Ａｌ具有不同的化学性质，二与ＹＢＣＯ界面的互扩散特性有明显不同，这些不同影响到接触界面的电学性质和接触窗口下ＹＢＣＯ超导性能，在Ａｇ／ＹＢＣＯ样品中，在高于３５０℃以上的温度下氧气氛中退火将引起Ａｇ和Ｏ的界面互扩散，但对ＹＢＣ     

强短脉冲供电辉光放电发射光谱法测定铜基合金组分的研究

文中所述的研究用实验室组装的强短脉冲供电辉光放电发射光谱（ＨＣＭＳＰＧＤ－ＯＥＳ）实验系统，对铜基合金中的次要组分Ｎｉ，Ａｌ，Ｍｎ，Ｓｉ的含量进行了测定，辉光放电（ＧＤ）源在强短脉冲供电（ＨＣＭＳＰ）时，原子线和离子线的发射得到增强，文中选用了Ｎｉ，Ａｌ，Ｍｎ，Ｓｉ的次灵敏线作分析线，对影响分析强度的因素进行了研究，在选定的实验条件下几种组分的含量进行了测定，测定结果与样品的推荐值吻合较好，六次侧     

依赖于时间的Jaynes—Cummings模型中的反聚束效应

本文利用友格－库塔法对多个方程组连续进行积分，提出了一种处理依赖于时间的Ｊａｎｅｓ－Ｃｕｍｍｉｎｇｓ模型，描述二能级原子与腔场相互作用的耦合系数依赖于时间的ＪＣＭ的哈密顿量为Ｈ＝１／２ω０σ３＋ω＾＋ａ＾＋ａ＾＋ｇ（ｔ）（σ＋ａ＋σ－ａ）ｈ＝１（１）这里，ｇ（ｔ）选择为时间上的一个脉冲ｇ（ｔ）＝ｇ０ｅｘｐ（－（ｔ－ｔ０）＾２／２ａ＾２），其中ｔ０和ａ分别为脉冲中心和脉冲宽度，ｇ０是一有量纲常数，     

ICP-AES法同时测定人血清中16种元素含量

本文探讨了用电感耦合等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）法同时测定了人血清中Ｎａ、Ｋ、Ｃａ、Ｍｇ、Ｃｏ、Ｍｏ等１６种元素的方法。采用工艺超纯硝酸消化,基体匹配消除干扰。本法最低检出限能满足血清样品的测定要求,回收率在９５％－１０６％之间,对探索血清微量元素与疾病的关系有着重要意义。     

ICP-AES法测定青壳鸡蛋中的13种元素

用高压消化罐消解后,ＩＣＰ－ＡＥＳ法同时测定青壳鸡蛋中Ｃａ、Ｍｇ、Ｆｅ、Ｍｎ、Ｚｎ、Ｃｕ、Ｐ、Ｉ、Ｓｅ、Ｓｂ、Ｂａ、Ｃｒ、Ｃｄ等１３种元素的含量,在优化实验条件下,ＲＳＤ为１．２４％－８．７６％,加标回收率为９３．０％－１０５．９。方法简便、可靠,结果令人满意。     

TBP色层分离—ICP／AES法测定锆铀铒合金中十七个微量杂质元…

本法对锆铀铒合金中十七个微量杂质元素和铒的测定进行了较系统的实验研究。取样１００ｍｇ时，Ａｌ，Ｃａ，Ｃｏ，Ｃｒ，Ｃｕ，Ｆｅ，Ｍｇ，Ｍｎ，Ｍｏ，Ｎｉ，Ｐｂ，Ｓｎ，Ｔａ，Ｔｉ，Ｖ，Ｙ和Ｚｎ的测定范围为３０－３２００μｇ／ｇ，Ｅｒ为０．２－３．２％，回收率９４－１０８％，ＲＳＤ为０．２－２．１％。     

神光Ⅱ间接驱动内爆实验ArX射线谱线模拟研究

ICF内爆物理研究中,示踪元素X射线谱诊断方法是推测内爆压缩温度、 密度以及燃料混合状态的有效方法.针对其中的非平衡物理过程, 研制了非局域热动平衡(non-LTE)下一维谱线输运程序Alpha.程序以辐射流体计算给出的温度、 密度等量为输入条件,求解细致组态(DCA)模型下的原子动力学方程和辐射输运方程, 自洽给出谱线不透明度,和成像面上的X射线谱分布.
利用该程序,模拟了神光Ⅱ装置上的掺Ar靶丸内爆示踪元素X射线谱诊断实验, 研究结果表明,谱线的自吸收效应影响发射的X射线谱的强度和形状, 谱线的宽度对自吸收效应的强弱也有影响.因此,在对X射线谱的数值模拟中应该考虑自吸收效应. 另外,与LTE近似下的发射谱的比较表明, LTE近似下,等离子体电离度大～1, 发射谱的形状与non-LTE的结果不同,且LTE近似下,谱线的强度比non-LTE的谱线强度大5-10倍, 采用LTE近似是不合适的.     

Investigation on non-LTE radiation emitted from a laser-irradiated Au disk

1 Introduction The laser-target coupling physics is a key topic in indirect-driven inertial confinement fusion (ICF) and X-ray application research[1―3]. When intense laser light irradiates the solid target, the plasmas are produced rapidly on the surface of the target. The laser en-ergy is mainly absorbed by inverse bremsstrahlung absorption, and a coronal region with high-temperature and low-density plasma is formed. Electron thermal conduction proc-ess transfers energy into over-dense re…     

Effects of non-local thermodynamic equilibrium conditions on numerical simulations of inertial confinement fusion plasmas

Effects of non-local thermodynamic equilibrium (non-LTE) condition on emission and hydrodynamics of typical inertial confinement fusion (ICF) plasmas are studied. The average degree of ionization at high temperatures is seen to be much lower compared to the values obtained from Thomas-Fermi scaling or Saha equation for high-Z element like gold. LTE and non-LTE predictions for emitted radiation from laser-driven gold foil are compared with the experimental results and it is seen that non-LTE simulations show a marked improvement over LTE results. The effects of one group and multigroup, LTE and non-LTE approximations of radiation transport on hydrodynamic parameters are studied for laser-driven aluminium and gold foils. It is further seen that non-LTE and multigroup effects play an important role in predicting conversion efficiency of laser light to X-rays.     

数值模拟辐射场对激光等离子体中物理过程的影响

利用研究非局域热力学平衡态下等离子体的程序包NIMP,就辐射场对等离子体中的激发和离化过程的影响进行了数值模拟研究,这对于未来研究辐射输运对天体物理过程影响的相关实验的设计具有一定的理论价值 关键词： 激光等离子体 离化态 局域热力学平衡     

激光腔靶耦合二维辐射输运数值模拟

间接驱动激光聚变过程中,黑腔内物质处于非局域热动平衡(non-LTE)状态,而且辐射传输具有非平衡、各向异性等特点。为了精确描述黑腔辐射场的演化及其与物质的相互作用,最新研制的激光聚变二维总体LARED集成程序,基于non-LTE的多群辐射输运建模,首次实现了激光黑腔靶实验的全过程数值模拟。数值结果表明,辐射输运计算较好地反映了黑腔辐射场均匀性变化,腔壁光斑区与非光斑区X光发射强度比与实验测量值接近,靶丸压缩形状与实验图像定性一致。     

激光与金靶耦合中非局域电子热传导的影响

 在一维非平衡辐射流体力学程序中,引入非局域电子热传导公式,对三倍频激光与金平面靶耦合产生等离子体状态进行了数值模拟计算。数值结果与加限流处理的Spitzer-Harm公式计算结果的比较表明,非局域电子热传导能够得到更为合理的数值结果和物理图象。     

Application of approximations for joint cumulative k-distributions for mixtures to FSK radiation heat transfer in multi-component high temperature non-LTE plasmas

Approximations for joint cumulative k-distribution for mixtures are efficient for full spectrum k-distribution (FSK) computations. These approximations provide reduction of the database that is necessary to perform FSK computation when compared to the direct approach, which uses cumulative k-distributions computed from the spectrum of the mixture, and also less computational expensive when compared to techniques in which RTE's are required to be solved for each component of the mixture. The aim of the present paper is to extend the approximations for joint cumulative k-distributions for non-LTE media. For doing that, a FSK to non-LTE media formulation well-suited to be applied along with approximations for joint cumulative k-distributions is presented. The application of the proposed methodology is demonstrated by solving the radiation heat transfer in non-LTE high temperature plasmas composed of N, O, N₂, NO, N₂⁺ and mixtures of these species. The two more efficient approximations, that is, the superposition and multiplication are employed and analyzed.     

A K-shell model for laser-produced Al plasma

The spectra from laser-produced plasma have been simulated by the newly developed model. The simulation agrees well with the experimental results, which can prove that the K-shell model is suitable for the application of the spectrum from laser-produced plasma. Also, the jkl satellite lines were found important for predicting the spectra.     

钠离子浓度对核小体纤维结构影响的Monte Carlo模拟

通过核小体纤维模型的构建，利用Monto Carlo方法模拟其在各种钠离子浓度的溶液中结构变化的过程.模拟结果显示当溶液的钠离子浓度增大时，核小体由锯齿状结构转变为螺旋状结构.在常温所得到的核小体结构参数与实验结果接近，较好地解释了溶液中的钠离子浓度对核小体纤维结构的影响. 关键词： 核小体纤维 超螺旋结构 Monte Carlo方法 钠离子浓度     

X-ray calculations for a NLTE Ar plasma

A model is developed to calculate emission spectrum of non-local thermodynamic equilibrium(NLTE) plasmas. The Collisional-Radiative model is adopted for non-LTE population calculations. Configuration-averaged rate coefficients that needed in the rate equations are obtained based on the first order perturbation theory. The Hatree-Fock-Slater self-consistent-field method is used to calculate electron wave functions. The present model is applied to the calculation of emissivity from a Ar plasma. The features of the spectra are in good agreement with those calculated by other theoretical models, but the data of the integrated emissivity differ by a factor 2～8.