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The Emission Heights of Transition Region Lines in an Equatorial Coronal Hole and the Surrounding Quiet Sun

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chinese Journal of Astronomy and Astrophysics 2008年第6期8卷 732-742页

作者： Hui Tian Li-Dong Xia Jian-Sen He Bo Tan Shuo Yao Department of Geophysics Peking University B eijing 100871 China Max-Planck-Institut fur Sonnensystemforschung D-37191 Katlenburg-Lindau Germany School of Space science and physics Shandong Univ. at Weihai Weihai 264209 China

Using the correlation between the radiance or Doppler velocity and the extrapolated magnetic field, we determined the emission heights of a set of solar transition region lines in an equatorial coronal hole and in the surrounding quiet Sun region. We found that for all of the six lower-transition-region lines, the emission height is about 4-5 Mm in the equatorial coronal hole, and around 2.Mm in the quiet Sun region. This result confirms the previous findings that plasma with different temperature can coexist at the same layer of transition region. In the quiet Sun region, the emission height of the upper-transition-region line Ne VIII is almost the same that of the lower-transition-region line, but in the coronal hole, it is twice as high. This difference reveals that the outflow of Ne VIII is a signature of solar wind in the coronal hole and is just a mass supply to the large loops in the quiet Sun.

关键词： Sun: transition region Sun: magnetic fields Sun: solar wind Sun: UV radiation

用Pr修饰的(Ce-Zr)O_2.溶体在三效催化剂中的作用

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中国稀土学报 2002年第3期20卷 265-269页

作者：汪文栋林培琰孟明胡天斗谢亚宁刘涛中国科学技术大学化学物理系安徽合肥230026 北京同步辐射中心北京100039

采用溶胶凝胶法制备了三效催化剂助剂 (Ce Zr)O2.,(Pr Ce Zr)O2.和 (Pr Zr)O2.,并对它们进行了XRD ,EXAFS和BET比表面的测定。采用H2.的程序升温还原 (TPR)表征该类助剂的还原特性 ,以考察此类含有镨的混合氧化物作为三效催化剂储氧组... 详细信息

采用溶胶凝胶法制备了三效催化剂助剂 (Ce Zr)O2.,(Pr Ce Zr)O2.和 (Pr Zr)O2.,并对它们进行了XRD ,EXAFS和BET比表面的测定。采用H2.的程序升温还原 (TPR)表征该类助剂的还原特性 ,以考察此类含有镨的混合氧化物作为三效催化剂储氧组分的可能性。在≥ 80 0℃高温时 ,(Pr Zr)O2.形成了立方相固溶体 ,并且变得更容易被还原。含少量Pr的三元固溶体 (Pr Ce Zr)O2.在其还原过程中起着重要的作用 ,也具有易被还原的重要特性。测量了含有Pt ,Pd和Rh的三效催化剂活性 ,即固定反应气氛组成 (S =1.0 0 )时CO ,C3.6 和NOx 转化的起燃温度。结果表明 ,在 (Ce Zr)O2.固溶体中加入少量的镨可使得C3.6 和NOx 转化的起燃温度降低 ,所有含镨的催化剂对NOx 转化均表现出较高的活性 ,并且在富氧区 (S≥ 1.0 0 )具有更大的S值宽度。

关键词：稀土镨铈-锆固溶体三效催化剂溶胶-凝胶法二氧化铈制备二氧化锆助剂

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同步辐射应用在中国的发展

物理 1999年第11期28卷 641-647页

作者：冼鼎昌中国科学院高能物理研究所北京100039

简要介绍了近１０

关键词：同步辐射应用发展中国 SR 同步辐射装置

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浸渍钡钨阴极表面同步辐射光电子谱研究

微波学报 2010年第S1期26卷 701-705页

作者：阴生毅张洪来奎热西钱海杰王嘉欧王宇王欣欣中国科学院电子学研究所中国科学院高功率微波源与技术重点实验室北京100190 中国科学院高能物理研究所北京100039

为了解浸渍钡钨阴极表面各元素的化学状态,采用同步辐射光电子谱技术对激活前后的阴极表面进行了研究。结果表明,与激活前相比,经1150℃×90min高温激活后,阴极表面吸附层厚度减薄,吸附C完全消失,O含量明显升高,W含量增加1倍,Ba含量增加... 详细信息

为了解浸渍钡钨阴极表面各元素的化学状态,采用同步辐射光电子谱技术对激活前后的阴极表面进行了研究。结果表明,与激活前相比,经1150℃×90min高温激活后,阴极表面吸附层厚度减薄,吸附C完全消失,O含量明显升高,W含量增加1倍,Ba含量增加2.。另外,阴极表面的O1s、W4f和Ba3.等的谱峰均向高结合能方向显著位移。分析认为,激活后的阴极表面分布的吸附氧,使W基体以及阴极表面的Ba均产生吸附氧化,Ba在阴极表面主要以吸附化合物Bam·On(m≤n)的形式存在。

关键词：同步辐射光电子谱浸渍钡钨阴极结合能化学位移

Photoluminescence,thermally stimulated luminescence and dosimetry properties of dysprosium doped strontium phosphate phosphors

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Photoluminescence,thermally stimulated luminescence and dosi...

第七届全国稀土发光材料学术研讨会

作者： Li Juan~(1,2.9) Zhou Huijun~1 Zhang Liwei~1 Zhang Chunxiang~3.Tang Qiang~3.Hao Jingquan~2.Zhang Yanli~4,Su Qiang~(2.5) Wang Shubin~2.(1 Chemistry and Biology College of Beihua University,Jilin,13.0}13.P.R.china) (2.Key Laboratoiy of Rare Earth Chemistry and physics,Changchun {2. of Applied Chemistry, chinese academy of science,Changchun,13.02.,P.R.china) (3.Department of physics,Sun Yat-Sen University,Guangzhou,5102.5,P.R.china) (4 Ionizing radiation Division,National {2. of Metrology,beijing,13.000,P.R.china) (5 State Key Laboratoiy of Optoelectivnic Materials and Technology,School of Chemistry and Chemical Engineering,Sun Yat-Sen University,Guangzhou,5102.5,P.R.china)

Thermally stimulated luminescence(TSL) is widely employed for radiation dosimetry and geological *** stimulated luminescence(TSL) dosimetry has been developed to the stage that it represents a key technique in absorbed dose *** in radiation dosimetry by the TSL technique has resulted in numerous efforts seeking production of new,{2.-performance TSL materials due to their potential applications in clinical,personal and environmental monitoring for both ionizing and non-ionizing radiation. Polycrystalline powder samples of dysprosium doped Sr(PO4):Dy phosphors were prepared by solid state reaction in air at {2. temperature and characterized by x-ray powder diffraction in this work. The excitation spectrum for Dy in the sample Sr(PO):Dy by monitoring the emission at 577nm exhibited H→D(2.4nm),H→P(3.2}nm),H→P(3.0nm),H→P(3.7nm), H→M(3.9nm)andH→G(43.2}m)forbidden f-f transitions of Dy *** emission broad band at about 42.nm,475nm,577nm,665nm and 750nm attributed to the host emission and F→H,F→H,F→HandF→Hf-f transitions of Dy ions by excited with wavelength 3.0nm were observed. The diffuse reflectance spectra of Sr(PO):Dy after and before 60Co gamma-ray irradiation and the subtracting spectrum were studied in 2.0000nm wavelength *** absorption bands were observed in the subtracting spectrum,the first one at about 2.0nm,and the later two bands at about 403.and 63.2}nm. The TSL emission spectrum of Sr(PO):Dy by 60Co gamma-rays irradiation at 2.3. showed that the characteristic emission bands at about 450nm,480nm,575 nm,665nm,750nm attributed to the host emission and F→H,F→H,F→Hand F→Hf-f transitions of Dy ions, agreeing basically with the photoluminescence(PL),*** of emission spectrum of PL and TSL originate from the same luminescent centers of Dy *** emission from Dy or Dy ions was observed in the measurement waveiength *** relative TSL intensity was plotted as a function of 60Co gamma-rays irradiation dose for the s

关键词： Thermally stimulated luminescence Dosimetry Strontium phosphate

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Triton　X－100对紫膜蛋白的效应

生物物理学报 1996年第1期12卷 153-156页

作者：生文君张志杰董宝中杨恒林胡坤生王敖金中国科学院高能物理研究所中国科学院生物物理研究所

本文采用同步辐射小角Ｘ射线散射方法研究了用非离子表面活性剂ＴｒｉｔｏｎＸ—１００处理后的嗜盐菌紫膜及其视紫红质蛋白结构的变化。实验结果表明，用不同浓度的ＴｒｉｔｏｎＸ—１００处理紫膜碎片时，紫膜及其蛋白所处的状态有着... 详细信息

本文采用同步辐射小角Ｘ射线散射方法研究了用非离子表面活性剂ＴｒｉｔｏｎＸ—１００处理后的嗜盐菌紫膜及其视紫红质蛋白结构的变化。实验结果表明，用不同浓度的ＴｒｉｔｏｎＸ—１００处理紫膜碎片时，紫膜及其蛋白所处的状态有着很大变化。

关键词：紫膜生物膜蛋白表面活性剂

ESTIMATION OF THE GRAVITATIONAL radiation (GR) FROM THE PULSAR PSR 193.+2.4

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chinese science Bulletin 1985年第1期30卷 29-32页

作者：秦荣先毛东宁 institute of high Energy {2. Academia sinica Beijing

A pulsar, PSR 193.+2.4, with rotational frequency of 642.Hz was newly discovered by Arecibo Observator in Puerto Rico in November, 1982. It has the fastest rotational frequency among all the found pulsars. The discovery of the pulsar shocked the astrophysical world, and attracted a number of gravitational wave (GW) researchers. Because this pulsar radiates GW at a frequency of 12.4 Hz, it is expected that the Weber-type antenna, L, the sound velocity V_s and the frequency of the detected GWv, have the relationship l-V_a/2.. The antenna for this pulsar is therefore required to have a length of 195 cm. If the GW radiation is strong enough, under the realizable conditions of great mass antenna and low-temperature ambient, using the method of

关键词： antenna Weber gravitational fastest enough rotational ambient length radius gravity

同步辐射X荧光微探针扫描分析氟碳铈矿物中的稀土元素

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中国稀土学报 1996年第3期14卷 280-283页

作者：安庆骧王锐兵邓赛文潘巨祥吴应荣吴澄宇国家地质实验测试中心中国科学院高能物理研究所中国地质科学院矿床研究所北京科技大学化学系

北京正负电子对撞机（ＢＥＰＣ）国家实验室的增频（或扭摆）磁铁（Ｗｉｇｇｌｅｒ）光源（储存环电子能量２．２ＧｅＶ；最大束流强度７５ｍＡ）提供的同步辐射（ＳＲ）白光，激发ＬＲＥＥ　Ｋ－系线，用ＳＲＸＲＦＭ扫描分析氟碳铈矿... 详细信息

北京正负电子对撞机（ＢＥＰＣ）国家实验室的增频（或扭摆）磁铁（Ｗｉｇｇｌｅｒ）光源（储存环电子能量２．２ＧｅＶ；最大束流强度７５ｍＡ）提供的同步辐射（ＳＲ）白光，激发ＬＲＥＥ　Ｋ－系线，用ＳＲＸＲＦＭ扫描分析氟碳铈矿物中的轻稀土元素（Ｌａ、Ｃｅ、Ｐｒ、Ｎｄ、Ｓｍ、Ｅｕ）的分布。取同一矿区的氟碳铈矿物，粉碎至粒度＜３００目。一部分熔融，沉淀分离，转成稀土氧化物后，用ＸＲＦ法分析稀土分量。另一部分，不加任何粘结物质，压成Φ２６ｍｍ（１５ｇ）圆片作为ＳＲＸＲＦＭ扫描分析的参比样品，从而可计算样品中稀土的含量。

关键词：同步辐射X荧光稀土元素氟碳铈矿物稀土矿床

Pressure-Induced Phase Transition of Nanocrystalline Iron Sulfide （FeS） coated by Polyvingl alcohol （PVA）

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Pressure-Induced Phase Transition of Nanocrystalline Iron Su...