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176,178Os新低位激发态的识别

王华磊 , 张玉虎 , 周小红 , 郭应祥 , 雷祥国 , 徐树威 , 谢元祥 , 郑勇 , 柳敏良 , 邢烨炳 , 谢成营 , 宋立涛 , 郭文涛 , T.Hayakawa , M.Oshima , Y.Toh , J.Katakura , Y.Hatssukawa , M.Matsuda , N.Shinohara , T.Ishii , H.Kusakari , M.Sugawara , T.Komatsubara

原子核物理评论 doi:10.3969/j.issn.1007-4627.2006.01.004

利用在束实验产生具有β+ / EC衰变性质核素176,178Ir,分析了在束实验条件下获得的γ-γ符合数据,识别出了176Os的4条新能级和13条新γ跃迁、178Os的5条新能级和14条新γ跃迁.籍助氦喷嘴快速带传输系统,进一步对176Ir的β+ / EC衰变进行了测量,在确认在束测量新γ射线的同时建议了176Ir的一个低自旋同核异能态.通过两准粒子耦合的半经验计算,建议了176,178Ir基态及同核异能态的组态.

关键词: 低位能级纲图 , 在束测量 , 半衰期

双奇核~(172)Re的高自旋态

张昕 , 张玉虎 , 周小红 , 郭文涛 , 郭松 , 郭应祥 , M.Oshima , Y.Toh , M.Koizimi , A.Osa , A.Kimura , Y.Hatsukawa , T.Morikawa , M.Nakamura , M.Sugawara , H.Kusakari , T.Komatsubara , K.Furuno

原子核物理评论

对~(149)Sm(~(27)Al,4n)~(172)Re反应产生的~(172)Re在束γ的实验数据进行了重新分析,新发现了可归属于~(172)Re的3个转动带,由此建立了由6个转动带构成的~(172)Re高自旋态能级纲图.依据相邻核的带结构知识和推转壳模型分析方法,对新发现的3个转动带的准粒子组态进行了指定,讨论了它们的转动特征.

关键词: 转动带 , 二准粒子组态 , 准粒子顺排 , 双奇核(172)~Re

双奇核172Re高自旋态实验研究

张玉虎 , 王华磊 , 周小红 , 柳敏良 , M.Oshima , Y.Toh , M.Koizimi , A.Osa , A.Kimura , Y.Hatsukawa , T.Morikawa , M.Nakamura , M.Sugawara , H.Kusakari , T.Komatsubara , K.Furuno

原子核物理评论 doi:10.3969/j.issn.1007-4627.2004.04.015

利用149Sm(27Al, 4nγ)172Re反应布居了形变双奇核172Re的高自旋态, 用12套带有BGO反康普顿抑制的高纯锗探测器阵列进行了在束γ实验测量, 首次建立了172Re由3个转动带构成的高自旋态能级纲图. 研究和讨论了3个转动带的结构特征, 基于已有的高自旋态核结构知识并通过系统学比较和分析指出它们的准粒子组态分别为πh11/2(○)νi13/2,πh9/2 (○)νi13/2和(○)π1/2-[541](○)ν1/2-[521]. 发现前两个转动带在自旋小于18时其转动能级呈现反常的旋称劈裂.

关键词: 在束γ谱学 , 双奇核172Re , 转动带 , 旋称反转

A≈110质量区奇A核形状演化研究

周厚兵 , 周小红 , 张玉虎 , 郑勇 , 李广顺 , M.Oshima , Y.Toh , M.Koizumi , A.Osa , Y.Hatsukawa

原子核物理评论

应用E-GOS(E-Gamma Over Spin)曲线方法研究了A≈110质量区奇A核结构随角动量增加的演化,发现随着角动量的增加原子核的激发特性从振动逐渐演化为转动.

关键词: E-GOS曲线 , 相变 , 形状演化

ELECTRONIC STRUCTURE OF Pd-Y-Si GLASSES

LUO Meiqing CHEN Nianyi Shanghai Institute of Metallurgy , Academia Sinica , Shanghai , ChinaYU Zhizhong Shanghai Institute of Testing Technics , Shanghai , ChianNING Yuantao ZHOU Xinming Kunming Institute of Precious Metals , Kunming , China CHEN Nianyi , Professor , Shanghai Institute of Metallurgy , Academia Sinica , Shanghai 200050 , China

金属学报(英文版)

The electronic structure of Pd-Y-Si glass has been investigated by ESCA and quantum chem- ical calculation.It was found that the valence electrons of Y transferred to Si atoms in this metallic glass,forming polar covalent bonds.Perhaps these strong covalent bonds link Si and Y atoms to form clusters that hinder the process of crystallization.

关键词: Pd-Y-Si glass , null , null , null

SOLUBILITIES OF Ce,Nd AND Y IN α-Fe

LI Laifeng XING Zhongshu Institute of Metal Research , Academia Sinica , Shenyang , China XING Zhongshu , professor , Institute of Metal Research , Academia Sinica , Shenyang 110015 , China

金属学报(英文版)

The solubilities of Ce,Nd and Y in α-Fe at 873 to 1153 K have been deter mined by means of electron microprobe quantitative analyses.The temperature dependences of the solubilities were obtained from the experimental data.The results have been compared with those deter- mined by three other technigues,very good agreement was obtained between the results of all these techniques.

关键词: α-Fe , null , null , null , null

沸石Y用于组装纳米CdS

翟庆洲 , 蔡建岩 , 于淼

稀有金属材料与工程

以沸石Y及以甲基三甲氧基硅烷对沸石Y进行表面改性后的Y(m)沸石作主体,用离子交换法制备Cd-Y及Cd-Y(m)样品,然后以硫代乙酰胺取代有毒的硫化氢作硫源,水热法制备Y-CdS及Y(m)-CdS主-客体纳米复合材料.利用粉末XRD、化学分析、红外光谱、固体扩散漫反射吸收光谱、发光研究对制备的样品进行了表征.化学分析表明,CdS已进入沸石Y(Ym)主体中;XRD结果表明,CdS进入沸石Y(Ym)后,制得的复合材料沸石骨架仍然存在,且保持高度有序性,不改变骨架的长程有序性;红外光谱结果表明,在所制备的Y-CdS及Y(m)-CdS样品中,有Si-O-Cd新键生成;固体扩散漫反射吸收光谱结果表明,沸石Y和Y(m)对可见光基本无吸收,Y-CdS和Y(m)-CdS吸收无明显差别;组装CdS后,Y-CdS及Y(m)-CdS产生发光现象.所制得的Y-CdS及Y(m)-CdS主-客体纳米复合材料具有作为发光材料的潜在性.

关键词: Y沸石 , Y改性沸石 , 甲基三甲氧基硅烷 , 纳米CdS , 主-客体纳米复合材料 , 表征

Microstructure Formation and Mechanical Property Involving Icosahedral Quasicrystal Phase of Y Rich Mg-Zn-Y Quasicrystal Alloy

D.Q. Wan , G.C. Yang

金属学报(英文版)

The microstructure formation and mechanical property involving icosahedral quasicrystal (I-phase) in the Y-rich Mg-Zn-Y alloy have been studied. The equilibrium formation of I-phase from the Y-rich Mg-Zn-Y melt is through a peritectic reaction between the Y-rich melt and the primary W-phase, which is discussed in detail. The independent nucleation and coupling growth mechanism between the W-phase and the I-phase, from the melt, are revealed, which is significant for understanding the peritectic reaction process involving icosahedral quasicrystal in the Mg-Zn-Y alloy. The mechanism of the quasicrystal phase strengthened magnesium alloys is also discussed here.

关键词: Mg-Zn-Y , null , null

EFFECT OF Y ON MECHANICAL PROPERTIES OF Fe-20Cr-4Al-Y ALLOY

LI Bei WU Shuangxia MENG Guang'en JIANG Liping PANG Wenjie Baotou Research Institute of Rare Earth , Baotou , China Baotou Research Institute of Rare Earth , P.O.Box 131 , Baotou 014010 , China

金属学报(英文版)

With the increase of Y content in the Fe-20Cr-4AI-Y alloy,the uniform deformability of tensile specimens was found to be slightly decreased,as well as,the fracture strength and re- duction after necking remarkably dropped.This seems to be dependent upon the brittle phase containing Y.The behaviour of Y-containing phase may be improved by adjusting the metallurgical technological process.

关键词: Fe-Cr-A1 alloy , null , null