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
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
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
FANG Zheng CHEN Xinmin(H.M.Chen) Central South University of Technology
,
Changsha
,
China FANG Zheng
,
Associate Professor
,
Department of Chemistry
,
Central South University of Technology
,
Changsha
,
China
金属学报(英文版)
By taking the effect of oxygen contents into account,a new set of formulae which represents the oxygen potentials of H_2O-H_2 and H_2O-H_2-inerts gas mixtures has been derived.Classi- cal representation is only a particular case of it.Some of the variables affecting equilibrium atmosphere when trace oxygen is present and optimum preparation of the gas mixtures to min- imize errors have been discussed.The reliability of some of previous equilibrium experiments under the oxygen potentials controlled by H_2O-H_2 or H_2O-H_2-inerts gas mixtures has also been criticized.
关键词:
gas equilibration method
,
null
,
null
,
null
Applied Physics Letters
ZnCoO:H nanocrystals are weak ferromagnetic at room temperature with a small coercivity and a small remanence, whereas ZnCoO nanocrystals are paramagnetic. The thermal irreversibility of zero-field cooling and field cooling magnetizations of ZnCoO:H nanocrystals corresponds to the existence of superparamagnetism due to the nanosize effect. X-ray photoelectron spectra show the incorporation of Co(2+) ions inside the ZnO lattice without changing the wurtzite structure. Our data suggest that hydrogen can induce ferromagnetism in ZnCoO and that ferromagnetic ZnCoO:H crystals with small particle size can show the superparamagnetism. (C) 2008 American Institute of Physics.
关键词:
magnetic semiconductors;zno;hydrogen;cobalt
王硕明
,
丁志军
,
于恒
,
张彩军
钢铁钒钛
研究了某H型钢厂采用半敞开方式浇注的H型钢腹板裂纹产生的原因.在该厂选取了26块有代表性裂纹的试样进行了细致的研究,研究认为:H型钢腹板裂纹主要是由钢中夹杂物因素造成,通过对钢中T[O]的研究发现,中间包T[O]量平均为94×10-6,铸坯中T[O]平均为60.8×10-6,同时对比1流铸坯和2流铸坯的T[O]量变化可以发现,中间包流场分布不合理.对该厂现有的中间包进行FLUENT模拟后发现,中间包稳流器矮坝较低,不能完全消除短路流,尤其在浇注后期,矮坝损耗殆尽,基本不起作用,短路流严重,应加以优化.
关键词:
H型钢
,
裂纹
,
夹杂物
,
数学模拟
徐峰
,
何彩红
,
徐勇
钢铁研究
简述了国内H型钢的发展现状,通过列举国内典型H型钢生产线,介绍分析了轧制H型钢的1-3-1、1-3和连轧三种工艺布置,以及目前轧制H型钢的X-X和X-H两种方法.根据目前国内生产状况,提出了H型钢技术改进的几项措施.
关键词:
H型钢
,
生产工艺
,
万能轧机
X.F.Rong and Z.Y.Qin College of Mechanical Engineering
,
Taiyuan University of Technology
,
Taiyuan 030024
,
China
金属学报(英文版)
In this paper, a deposition feature of a SiC:H films deposited by a RF sputtering system and a effect on the hardness of the films with various deposition conditions are investigated, and the effects of the silicon on a C:H are studied. It follows from the results that the properties of hardness can be changed with the depositing conditions. An increase of silane in the gas phase allows to deposit a SiC:H having tetrahedral structure. The sets of deposition conditions by which the different types of a SiC:H films can be deposited are obtained.
关键词:
a SiC:H film
,
null
,
null
