Change in the Shape of Nuclei in the Chains of Krypton,Strontium, Zirconium,Molybdenum, and Ruthenium Isotopes in the Relativistic-Mean-Field Approximation

Physics of Atomic Nuclei - Changes in the shape of nuclei in the chains of even—even crypton, strontium, zirconium, molybdenum, and ruthenium isotopes are studied on the basis of the...     

Estimation of the Optimum Concentration Interval of the Contents of Praseodymium, Neodymium, Europium, Holmium, and Erbium in a Solution

Based on the electronic absorption spectra of Pr³⁺, Nd³⁺, Eu³⁺, Ho³⁺, and Er³⁺ ions in 1 M aqueous solutions of chloric acid, calibration graphs have been constructed in a concentration of metals–optical density of a solution format for different frequencies. The band for praseodymium was used at 22,520 cm^–1, for neodymium at 17,380, 13,480, and 12,560 cm^–1, for europium at 25,380 cm^–1, for holmium at 18,580 and 15,580 cm^–1, and for erbium at 39,160, 26,480, and 19,160 cm^–1. The errors in determining the concentration of the indicated elements as a function of their content have been calculated. It is shown that for perchloric solutions of praseodymium it is possible to correctly determine its contents within the concentration range 0.1–1.5% at a frequency of 22,520 cm^–1; for neodymium the ranges are 0.4–1.0, 0.3–1.0, and 0.5–1.0% at 17,380, 13,480, and 12,560 cm^–1, respectively; for europium 0.4–1.5% at 25,380 cm^–1; for holmium — 0.2–1.5 and 0.4–1.5% at 15,580 and 18,580 cm^–1, and for erbium the range is 0.4–1.0% at frequencies of 39,160, 26,480, and 19,160 cm^–1.     

Anomalies of density, stresses, and the gravitational field in the interior of mars

We determined the possible compensation depths for relief harmonics of different degrees and orders. The relief is shown to be completely compensated within the depth range of 0 to 1400 km. The lateral distributions of compensation masses are determined at these depths and the maps are constructed. The possible nonisostatic vertical stresses in the crust and mantle of Mars are estimated to be 64 MPa in compression and 20 MPa in tension. The relief anomalies of the Tharsis volcanic plateau and symmetric feature in the eastern hemisphere could have arisen and been maintained dynamically due to two plumes in the mantle sub-stance that are enriched with fluids. The plumes that originate at the core of Mars can arise and be maintained by the anomalies of the inner gravitational field achieving +800 mGal in the region of plume formation, ?1200 mGal above the lower mantle-core transition layer, and ?1400 mGal at the crust.     

Indices of refraction of ZnS,ZnSe, ZnTe,CdS, and CdTe in the far infrared

The indices of refraction of pure ZnS, ZnSe and ZnTe at 2, 80, and 300°K have been measured in the spectral region from 10 to 100 cm^-1. The indices of refraction can be described by the simple dispersion formula for an undamped harmonic oscillator. The static dielectric constants of these materials are obtained from the best fit parameters using a simple dispersion equation. The average indices of refraction of pure CdS and CdTe at 5°K in the spectral region from 10 to 100 cm^-1 have also been measured.     

Cluster structure of the surface in the amorphous,quasicrystalline, and liquid states

The electronic structure of the Zr₆₀Ni₂₀Ti₂₀, Al₆₅Cu₂₀Fe₁₅, and Al₈₆Mn₁₄ systems has been investigated by X-ray photoelectron spectroscopy and band calculations of the total and partial densities of electronic states have been carried out by the TB-LMTO-ASA method with the aim of studying the chemical bonds and the nearest environment of atoms in the liquid, amorphous, and quasicrystalline states. A direct proof of the inheritance of the chemical structure of the liquid state in the amorphous and quasicrystalline states has been obtained for the first time. The similarity of the electronic structure and the nearest environment of atoms indicates identity of clusters in the liquid, amorphous, and quasicrystalline states. The degree of hybridization of valence electrons of atoms in clusters increases in going from the quasicrystalline to the amorphous state due to the increase the number of transition metal atoms in clusters.     

ICP-AES法直接测定地热温泉水样中的钾、钠、钙、镁、硅、锂、硼的研究

采用顺序扫描式ＩＣＰ光谱仪,直接测定了地热温泉水样中的７种元素,并对最佳测试条件的选择进行了探讨,方法简便,快速、准确,检出限及精密度均可满足分析要求。     

丹东地区健康小学生发样中Zn、Fe、Cu、Ca和Mg等微量元素的测定

本文通过原子吸收光谱法对丹东地区万余名6-13岁健康小学生发样中Zn、Fe、Cu、Ca、Mg等微量元素的含量状况进行了分析,结果表明丹东地区6-13岁健康小学生普遍缺Zn,且以男学生尤为明显,其他微量元素在各不同年龄阶段也有不同程度的缺乏.同时获得了一系列相关数据,从而为丹东小学生的健康生长发育提供了极有价值的参考资料和科学依据.     

The measurement of the magnetic susceptibility of some elements (Fe,Co, Ni,Ge, Sn,Te) in the liquid state

A magnetic balance was used for measuring the susceptibility of metals and alloys, in an atmosphere of purified argon, up to 1800°c.

Comparison of the susceptibilities of liquid Fe, Co and Ni gives information on the liquid state. The changes in the susceptibilities of Ge, Sn and Te on melting are typical of semi-metallic elements and semiconductors, but their behaviour differs according to the degree of symmetry in the solid state.     

ICP-AES同时测定铝合金中Fe,Si,Cu,Mg,Mn,Ni,Zn,Ti,Cr,Sr等杂质元素

本文通过基体干扰和操作条件的试验研究，分别用基体匹配法和干扰系数法校正基体干扰和待测元素间的干扰，建立了以氢氧化钠溶样，ICP－AES同时测定铝合金中铁、锰、铜、锌、镁、钛、硅、镍、铬、锶等杂质元素的方法。方法快速、简便、可靠，回收率93％－102％，适用于进出口铝合金的快速检验。     

Evaluation of distribution and bioavailability of Cr,Mn, Fe,Cu, Zn and Pb in the waters of the upper course of the Lerma River

Distribution and bioavailability of Cr, Mn, Fe, Cu, Zn, and Pb in the waters of the upper course of the Lerma River (UCLR), Mexico, were evaluated by means total reflection x‐ray fluorescence spectrometry. The surface water samples were collected from eight sites distributed along the flow direction of the river. Four sampling campaigns were carried out in each site during a one‐year period. The water samples were analyzed in triplicate, using a TXRF Spectrometer ‘TX‐2000 Ital Structures’ with a Si(Li) detector and a resolution of 140 eV (FWHM) at Mn Kα. A Mo tube (40 kV, 30 mA) with 17.4 KeV excitation energy was used for a counting time of 500 s. Results show that the concentration ranges of heavy metals in the water are the following: Cr, from < 5 to 56 µg/l; Mn, from 9 to 788 µg/l; Fe, from 98 to 8474 µg/l; Cu, from 10 to 225 µg/l; Zn, from 23 to 189 µg/l and Pb, from < 3 to 30 µg/l. There are significant statistical differences in the concentration of heavy metals between the different sampling sites and between the different sampling campaigns. The Pearson correlation results indicate a strong correlation between some heavy metals in the water, this significant correlation (p < 0.05) indicating a natural or/and a shared contamination source for these metals. Metal concentration in the water mostly did not exceed the guide values given by Mexican regulation for agricultural use. Only Cu, Mn and Fe in total water phase exceeded the maximum permissible limits for irrigation proposes at some sites. Copyright © 2007 John Wiley & Sons, Ltd.     

ICP-AES法测定铝锂合金中Li、Mg、Fe、Cu、Si、Zr的研究

本文研究了采用ＩＣＰ－ＡＥＳ技术同时测定铝锂合金中Ｌｉ、Ｍｇ、Ｆｅ、Ｃｕ、Ｓｉ、Ｚｒ等六元素的分析方法,优化了工作条件,经对合成样品和实际样品测量,对Ｌｉ（１％－４％）、Ｍｇ（０．５％－６％）、Ｆｅ（０．０５％－２．５％）、Ｃｕ（０．５％－５％）、Ｓｉ（０．０５％－０．５％）、Ｚｒ（０．０５％－０．５％）,方法的相对标准偏差均小于５％,回收率为９３％－１０５％。方法对照结果亦表明,本方法简便、快速、准确     

Measurement of the muonic x-ray cascade in Mg,AI, In,Ho, and Au

The muonic x-ray cascades in metallic targets of Mg, Al, In, Ho, and Au have been measured with Ge detectors. X-ray intensities from levels with principal quantum numbers up ton=15 were determined. Radiative Coulomb capture of muons to low lying levels was searched for but not found. The experimental intensities could be reproduced by cascade calculations starting atn=20 with properly chosen initial angular momentum distributions, either modified statistical or — in the case of Ho —linear. The electronicK refilling rates for Mg and Al were found to be roughly only one third of the refilling rates for aK hole in an ordinary atom. The full refilling rate, however, is adequate for the heavier elements.     

ICP-AES同时测定满山香子中的铜、铁、锌、钙、镁、锰和钴

电感耦合等离子体发射光谱法 (ICP- AES)测定中药满山香子中的铜、铁、锌、钙、镁、锰、钴等 7种元素的含量。研究了样品溶解酸、元素分析线的选择。各元素测定的相对标准偏差为 1.6 0 %— 6 .38% ,加标回收率为 97.0 0 %— 10 5 .0 0 % ,方法方便、可靠 ,具有良好的准确度和精密度。     

速效胃宁冲剂中锌、铜、铁、锰和镍含量分析

用原子吸收法测定五批速效胃宁冲剂中锌、铜、铁、锰、镍的含量。结果表明,速效胃宁冲剂中铁含量较丰富,铜含量较少,其含量由大到小的顺序为：铁＞锌＞锰＞镍＞铜。探讨了速效胃宁冲剂中微量元素与疗效的关系。     

硫酸铜中杂质铁、铅、锌、镍的火焰原子吸收法（FAAS）测定

本文建立了一种简便快速、准确测定进口硫酸铜中铁、铅、锌、镍的火焰原子吸收方法（ＦＡＡＳ）。利用测定主成份的废液直接测定四种杂质，不需另外制备样品，简化了操作步骤，省时省力，节约试剂，且灵敏度好，准确性高，有一定的推广和应用价值。     

火焰原子吸收光谱法连续测定化探样品中的银、铜、铅和锌

样品以氢氟酸、硝酸、高氯酸分解.制成HCl(1+9)溶液,在空气-乙炔火焰中,水相直接测定铜、锌,TOA-MIBK萃取,有机相中测定银、铅.     

Theoretical intricacies of the single-slit,the double-slit,and related experiments in quantum mechanics

The purpose of this work is to carry out a systematic, detailed analytical study, together with the direct interpretations, as they follow from the analytical expressions obtained, of three basic experiments which have been classical examples in our understanding of quantum mechanics. The experiments considered are: the single- and double-slit (-hole) experiments, and the final one, which, in particular, deals with the situation where a particle is reflected off the detection screen in the single-slit experiment. Special emphasis is put on pointing out some purely quantum mechanical results, which follow from the analytical expressions, as well as on making a comparison with classical physics. Needless to say, the analysis of such experiments has been extremely important in laying the foundations of quantum physics.Work supported by the Department of National Defence Award under CRAD No. 3610-637:F4122.