921 resultados para NH2-MIL-125(Ti)


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在中国原子能研究院HI-13串列加速器上用束-箔技术完成了80MeVTi离子和C箔相互作用产生的高电离态离子谱观测,与用激光等离子体技术的实验结果做了比较,大多数谱线与激光等离子体技术的实验结果有较好的符合,有3条谱线是未观测到的.这几条谱线为ⅩⅧ13·406,ⅩⅧ14·987,X17·439nm,属于2s2p24P3/2—2p32D3/2,2s2p21S0—2sp31P1,4p1P0—5d1P1跃迁.

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在加速器上利用束箔光谱方法 ,测量了Ti离子的高电离态光谱

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通过116Cd(14N,5n),Ebeam=65MeV的核反应布居了125Cs的高自旋态.利用在束γ谱学实验方法,进行了γ γ符合测量,使已知的125Cs核能级纲图得到了扩展,并且修正了某些组态的带头激发能.

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报道在中国原子能研究院HI-13串列加速器上用束-箔技术研究120MeV的Ti离子和C箔相互作用产生的高电离态离子谱的实验结果.在120-220nm范围,观测到53条激发能级的发射的谱线,其中有11条谱线是新确认的,实验结果与激光等离子体实验和理论结果相符合.

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简单介绍了利用LNS的回旋加速器产生的116Sn束轰击12C和24Mg靶的实验装置以及实验过程.该实验通过MEDEA探测器测量了由全熔合与非全熔合反应产生的较低激发能区(160—300MeV)质量数A≈125的热核的巨偶极共振特性,比较了不同靶子、不同束流能量时巨偶极共振的γ产额的变化.

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报道用 15 0keV的高电荷态离子1 2 6 Xeq + (6≤q≤ 30 )轰击Ti固体表面产生 2 0 0— 10 0 0nm波段发射光谱的实验结果 .结果显示 ,用电荷态足够高的离子作光谱激发源 ,无需很强的束流强度 (nA量级 ) ,便可激发起样品表面的原子和离子在可见光波段的特征谱线 .当入射离子剥离度q >qc≈ 2 0时 ,Ti原子及其离子的特征谱线强度突然显著增强 ;不同金属靶 ,特征谱线突然增强的qc值不同 .理论分析表明 ,这与q大于此临界值后 ,单电子转移释放能量激发靶材料传导电子气体的表面等离激元密切相关 .

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利用在束γ谱学方法,通过~(124)Sn(~7Li,α2n)反应研究了~(125)Sb的激发态,首次建立了~(125)Sb的高自旋能级纲图,其中包括21条新γ跃迁和14个新能级。发现1970,2110和2470 keV3个能级为同质异能态,基于延迟符合测量确定了它们的寿命范围,并确定其自旋、宇称分别为15/2~-,19/2~-和23/2~+。根据粒子-核芯耦合图像和经验壳模型计算解释了~(125)Sb的能级结构,3个同质异能态的组态分别被指定为πg_(7/2)(×)V(h_(11/2)s_(1/2))_(5~-),πg_(7/2)(×)V(h_(11/2)d_(3/2))_(7~-)和πg_(7/2)(×)V(h_(11/2)~2)_(10~+),

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利用在束γ谱学方法 ,通过1 2 4 Sn( 7Li,α2n)反应首次研究了丰中子核1 2 5Sb的高自旋态 .建立了自旋达 2 3 2 +、激发能至 2 63 7keV的能级纲图 ,其中包括 2 1条新γ跃迁和 1 4个新能级 .在 1 970 ,2 1 1 0和 2 471keV识别出了 3个同质异能态 ,估计了它们的寿命范围 ,并建议分别具有πg7 2 ν(h1 1 2 s1 2 ) ,πg7 2 ν(h1 1 2 d3 2 ) ,πg7 2 ν(h21 1 2 )三准粒子组态 .根据价质子与1 2 4 Sn核芯激发态的耦合讨论了1 2 5Sb的能级结构 .

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Well-aligned TiO2/Ti nanotube arrays were synthesized by anodic oxidation of titanium foil in 0.5 wt.% HF in various anoclization voltages. The images of filed emission scanning electron microscopy indicate that the nanotubes structure parameters, such as diameter, wall thickness and density, can be controlled by adjusting the anoclization voltage. The peaks at 25.3 degrees and 48.0 degrees of X-ray diffraction pattern illuminate that the TiO2 nanotube arrays annealed at 500 degrees C are mainly in anatase phase. The filed emission (FE) properties of the samples were investigated. A turn-on electric field 7.8 V/mu m, a field enhancement factors approximately 870 and a highest FE current density 3.4 mA/cm(2) were obtained. The emission current (2.3 mA/cm(2) at 18.8 V/mu m) was quite stable within 480 min. The results show that the FE properties of TiO2/Ti have much relation to the structure parameters.

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Highly ordered TiO2/Ti nanotube arrays were fabricated by anodic oxidation method in 0.5 wt% HF. Using prepared TiO2/Ti nanotube arrays deposited Ni nanoparticles as substrate, high quality diamond-like carbon nanorods (DLCNRs) were synthesized by a conventional method of chemical vapor deposition at 750 degrees C in nitrogen atmosphere. DLCNRs were analyzed by filed emission scanning electron microscopy and Raman spectrometer. It is very interesting that DLCNRs possess pagoda shape with the length of 3-10 mu m. Raman spectra show two strong peaks about 1332 cm (1) and 1598 cm (1), indicating the formation of diamond-like carbon. The field emission measurements suggest that DLCNRs/TiO2/Ti has excellent field emission properties, a low turn-on field about 3.0 V/mu m, no evident decay at 3.4 mA/cm(2) in 480 min. (C) 2009 Elsevier B. V. All rights reserved.

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Well-aligned TiO2/Ti nanotube arrays were electrochemically formed in a HF solution for different anodization times. Field emission scanning electron microscopy (FE-SEM) images reveal that anodization time had a great influence on the morphology of TiO2/Ti nanotube arrays. The composition of resulting nanotubes was analyzed by X-ray photoelectron spectroscopy (XPS). Field emission properties of the prepared samples with different morphologies were investigated by the Fowler-Nordheim (F-N) theory. The results indicate that the morphology can affect field emission behaviors. TiO2/Ti nanotube arrays with clear, uniform, and short nanotubes display moderate field emission properties, and have the better turn-on field of 4.6 V/mu m and good field emission stability. (C) 2010 Elsevier B.V. All rights reserved.

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本实验工作是在中国原子能科学研究院的HI-13串列加速器国家实验室第二测量厅原子物理实验平台上完成。本工作采用能量为20-50MeV的高电荷态O5+离子去轰击Au, 测量了不同能量下Au的L1、Lα、Lβ、Lγ的X射线谱,计算了不同能量下各条X射线的产生截面,并与ECPSSR理论计算结果进行了比较。实验结果表明σ(Ll)/σ(Lα) 和σ(Lγ)/σ(Lα)与ECPSSR理论计算结果符合比较好,而对于σ(Lβ)/σ(Lα),在较低能区实验值略高于理论值。在中国科学院近代物理研究所320kV高电荷态离子实验研究平台上测量了Xeq+ (q=17-29)入射Al、Ti和Ni等表面诱发的可见光和红外光。通过对靶原子光谱线的研究,实验发现,随着入射离子的电荷态增高,原子和离子的各种光谱线可得到有效地激发。低速高电荷态离子入射金属固体表面,靶原子的特征谱线的激发强度,与入射离子的电荷态q密切相关。qc的实验测量值和理论计算值符合的较好

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本文用100KW Ar~2离子在低温下对Tl/AL薄膜进行了混合束研究。实验试样是在单晶硅上蒸镀约5000A的铝膜,相继再蒸上所需不同厚度的钛膜。用2.0Hev α粒子对注入前后的样品进行了RBS分析。经过仔细的实验数据处理,结果发现:T1/AL界面原子混合量σ~2跟注入剂量φ成线性关系,界面的氧化层对T1/AL界面区原子间的相互混合有一定的影响;在相同注入条件下,界面原子混合σ~2随钛膜厚度的变化成一定的规律。另外,还就Ti/AL离子事混合进行了计算机Nonte Carto模拟计算,并与实验结果进行了比较和讨论