中重核素加速器质谱测量的实验谱模拟

加速器质谱测量中重核实验中存在多种离子的干扰,从而给实验谱的核素分析和在束确认带来困难。为了解决这一问题,我们建立了中重核素加速器质谱测量的实验谱模拟方法,用此方法的分析结果与实验测量结果进行了比较,结果显示此方法可以很好用于核素的分析。     

A study of ~(36)Cl age in Quaternary groundwater of Hebei plain, China

Chlorine-36 has various advantages as a dating tool for old groundwater. In this paper, 36CI of Quaternary groundwater in the Hebei plain of North China has been measured using accelerator mass spectrometry (AMS). Ages calculated from the 36CI/CI ratio show that ion filtration, which is responsible for the CI- concentration increasing with depth and along flow paths in Hebei plain groundwater. It is concluded that 36CI age of the groundwater in the 3rd Group of the Quaternary (Q2) in the Cangzhou area is 250ka, and that of the 4th Group(Q1) is 300ka.     

加速器质谱测量93Zr的刻度研究

A method of determination for ⁹³Zr/⁹²Zr ratio by multi-collector inductively plasma mass spectrometry (MC-ICP-MS) was described in this paper. A ⁹³Zr/⁹²Zr ratio of (2.75±0.07)×10^－5 was obtained in the original sample for AMS measurement and its relative standard error was 2.5%. Considered the contribute of above-thermal neutron, a calculated ⁹³Zr/⁹²Zr ratio of 2.56×10^－5 was obtained and it was according with measurement of the result. The results showed that it can be used for AMS measurement standards sample preparation. A series 93Zr standards sample for AMS measurement were diluted by irradiated sample with enriched 92Zr.     

ISO9000标准在长春双阳水泥厂的应用

ＩＳＯ９０００标准在长春双阳水泥厂的应用姜山长春双阳水泥厂１前言长春双阳水泥厂是国家“八五”重点工程，建有一条日产２０００吨熟料干法窑外分解线及矿山、粘土矿等配套设施，整条生产线各项技术经济指标达到国际八十年代先进水平，年产高标号水泥６７吨，是国家大...     

从信息技术角度研究课堂教育教学质量存在的问题及解决路径——以高等院校经管类专业为例

随着中国市场经济的发展,一时间经济管理类专业成为热点学科,高等院校对经济管理类专业不断扩招。但现今高等院校经济管理类专业的课堂教育教学还存在着一些问题,特别是在教育教学的信息技术应用方面有着很大的不足,严重影响着人才培养的质量。本文通过对经营类专业信息化教学中存在的问题进行研究,寻求有效地解决路径,以促进教学质量的提高,使培养出的人才更好地适应社会发展的需要。     

充气飞行时间探测方法研究进展

在AMS测量中最常用的探测器是飞行时间(time-of-flight,简称TOF)探测器和多阳极气体探测器.大部分的TOF探测器是微通道板(MCP) MCP和MCP与SBD(气体电离室)结构,有部分实验室采用MCP SBD的探测器结构用飞行时间和总能量的双维谱进行同位素鉴别.     

AMS Measurement of 36Cl with a Q3D Magnetic Spectrometer at CIAE

The ratio of 36Cl/Cl can determine the exposure age of surface rocks and monitor the secular equilibrium of 36Cl of sedimentary and igneous rock in groundwater. Due to the uncertainty effects of different chemical separation processes for removing 36S, there is a high degree of uncertainty in 36Cl accelerator mass spectrometry (AMS) measurements if the ratio of 36Cl/Cl is lower than 1014 . A 36Cl AMS higher sensitivity measurement has been set up by using a E-Q3D method at the China Institute of Atomic Energy (CIAE). The performances of E-Q3D method for 36Cl-AMS measurement had been systemically studied. The experimental results show that the E-Q3D method has a higher isobar suppression factor. Taking advantage of direct removing 36S, the sample preparation can be simplified and the uncertainty effects of different chemical separation processes can be reduced in 36Cl AMS measurements.     

3R政策提升日本资源使用效率

在大规模制造、消费和处置的经济活动中，日本排放了数量巨大的废弃物，这些废弃物给日本带来了巨大的问题，如废弃物最终处置点的匮乏以及不适当的废弃物处理方式给环境带来的负面影响等。由于全球经济状况变化所带来的原材料（如石油和铁矿石）价格的攀升，日本已经意识到未来资源和能源的耗尽问题。为了应对上述挑战，日本政府制定了一系列3R（Reduce，Reuse，Recycle）政策，以促进废弃物的减少以及旧产品的再循环利用。     

放射性核束64Cu的产生和加速实验研究

开展了产生和加速放射性核束64Cu(Off-line)的实验研究,解决如下技术关键离子源的强放射性64Cu靶的制备、安装、准直和屏蔽;弱束流64Cu加速时的加速器调束;64Cu束流的分离和鉴别.在实验靶上获得64Cu离子(80MeV)的流强为4×103/s.