排序方式: 共有30条查询结果,搜索用时 296 毫秒
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为满足兰州重离子加速器的实验要求,在14.5GHz高电荷态ECR离子源上做了一系列产生金属离子的实验,尝试了多种方法,包括炉子加热及MIVOC(Metallic Ion form Volatile Compounds)两种方法,其中,用炉子做的结果较理想。实验主要研究了铜、锌、镍多种电荷态离子的产生,具有代表性的是39euA的13+,30euA的Zn13+和29euA的Ni10+。分别给出了这三种金属离子产生的多电荷态束流峰谱图,以及实验的一些其它现象及结果,并对其进行了讨论与总结。 相似文献
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以Gd2O3和ZrOCl2.8H2O为原料,氨水为矿化剂,在200℃和12~30 h的水热条件下合成的前驱体,经固相反应获得Gd2Zr2O7纳米粒子。用X射线衍射(XRD)、热重差热(TG-DTA)、傅立叶变换红外光谱(FT-IR)、扫描电镜(SEM)等测试手段分析了样品合成过程的物相变化、产物结构及形貌特征。结果表明:在n(Gd)∶n(Zr)=1∶1,水热合成温度200℃,pH=11,保温24 h,合成的前驱体经1000℃、2 h煅烧获得分散性好、形貌近球形、粒径约23nm的Gd2Zr2O7纳米粒子。 相似文献
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简单介绍了采用炉子加热、 挥发性金属化合物和溅射产生ECR离子源的金属离子的3种方法和实验结果, 主要研究了铜、 锌、 镍和铁等多种电荷态离子的产生. 对3种方法分别进行了探讨.To satisfy the requirements of HIRFL (Heavy Ion Research Facility in Lanzhou), series of experiments have been done to produce metallic ion beams. By now, numerous methods have been tested, in which MIVOC (Metallic Ion from Volatile Compounds), heating oven methods and plasma sputter methods are all included. According to the experiments, the results of using MIVOC methods and heating oven methods are very good. In most of our researches, emphasis was put upon the ion production of iron, Nickel, Tantanum, copper of different charge states. Among the ion beams we have obtained, 210 μA Fe11+, 175 μA Fe12+, 142 μA Fe13+, 25 μA Fe16+, 64 μA Ni10+, 57 μA Ni13+, 31 μA Ni15+ and 15 μA Ni16+ are representative results. 相似文献
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Deterministic joint remote preparation of an arbitrary two-qubit state in the presence of noise 下载免费PDF全文
Using two tripartite Greenberger-Horne-Zeilinger (GHZ) states as the shared channels, we investigate the noise effects on the deterministic joint remote preparation of an arbitrary two-qubit state. By unitary matrix decomposition procedure, we first construct the quantum logic circuit of the deterministic joint remote state preparation protocol. Then, we analytically derive the fidelity and the average fidelity for the deterministic joint remote preparation of an arbitrary two- qubit state and of four types of special two-qubit states under the influence of the Pauli noises. It is found that the fidelity depends on the noise types, the qubit-environment coupling strength, and the state to be remotely prepared. Moreover, even if the two GHZ channels are subject to the same environmental noises, the average fidelities for remotely preparing different two-qubit states display different time evolution behaviors. The remote preparation of the identical two-qubit states also shows that the average fidelities affected by different noisy environments exhibit different evolution actions. 相似文献
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以CoCl2·6H2O和CS(NH2)2为水热前驱物,在不同pH值下制备了CoS2粒子,对CoS2的物相组成、微观形貌、热稳定性和正极材料电化学性能进行表征和测试.结果表明,CoS2粒子在酸性和碱性溶液中形核生长机制不同,当pH =5和pH=10时分别获得黄铁矿结构CoS2粒子其形貌为类球形和不规则块状,对应热分解温度为650℃和610℃.在100 mA/cm2放电时,两种形貌CoS2正极材料的电化学性能基本相近;800 mA/cm2放电时,类球形CoS2放电比容量较块状CoS2高9.65;,并具有优于后者的高初始放电电压及低内阻特性. 相似文献
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