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强扰动能区非全裸C^(q+),O^(q+)(q=1—4)与He原子碰撞过程中截面比的实验研究

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物理学报 2009年第8期58卷 5342-5349页

作者：周春林邵剑雄陈熙萌高志民王俊孙光智席发元陈益峰陈林丁宝卫王兴安娄凤君徐俊奎邱玺玉王幡吕瑛兰州大学核科学与技术学院兰州730000

利用兰州大学2×1.7MV串列加速器离子-原子碰撞实验终端上产生的单核子能量为20—500keV的Cq+和Oq+(q=1—4)离子与He原子碰撞.采用符合测量方法和多参数数据获取系统得到了散射离子与反冲离子电荷态的二维谱,从而分别得到直接电离、入... 详细信息

利用兰州大学2×1.7MV串列加速器离子-原子碰撞实验终端上产生的单核子能量为20—500keV的Cq+和Oq+(q=1—4)离子与He原子碰撞.采用符合测量方法和多参数数据获取系统得到了散射离子与反冲离子电荷态的二维谱,从而分别得到直接电离、入射离子俘获电子和入射离子损失电子截面与总截面的截面比Rdirect,Rcapture和Rloss,并对强扰动能区的各个反应道之间竞争关系及同一反应道在不同碰撞体系中所表现出的实验规律进行了比较和定性分析.

关键词：离子-原子碰撞截面比竞争关系强扰动区

Experimental study of cross-section ratios in the collisions of C^(q+) and O^(q+) (q=1-4) on atomic helium in strong-interaction region

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Chinese Physics B 2011年第1期20卷 322-327页

作者：陈熙萌江丽娟周鹏周春林高志民邱玺玉崔莹王兴安娄凤君吕学阳贾娟娟陈林邵剑雄吕瑛王幡 School of Nuclear Science and Technology Lanzhou University

We have measured the cross-section ratios of helium induced by Cq＋ and Oq＋（q = 1-4） in an energy range from 20 keV/amu to 500 keV/amu, and obtained the two-dimensional spectra by employing the coincidence method combined with the MPA-3 data acquisition system. Hence, we obtain the ratios of total single-ionization cross-sections （SI, SC, SLSI, and DLSI）, total double-ionization cross-sections （DI, DC, TI, SLDI, and DLDI） and cross-sections of every process （SI, SC, SLSI, DLSI, DI, DC, TI, SLDI, and DLDI）, which induce the single-ionization and double-ionization, to the total cross sections respectively. The competitive relations between the reaction-channels and the experimental data law of each reaction-channel are revealed explicitly, and the qualitative explanations involved in those results are also presented accordingly.

关键词： ion-atom collisions strong-interaction region cross-section ratios competitive relation

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甜叶菊叶部病害对叶片产量的影响

现代化农业 1990年第6期 9-9页

作者：于莲波靳学慧娄凤君黑龙江八一农垦大学

甜叶菊是一种新型糖源,甜叶菊糖甙的甜度相当于蔗糖的200～300倍,而热量仅为蔗糖的1/3,因此对糖尿病和肥胖症患者有特殊食用价值。发展甜叶菊生产,对补充国内食糖不足和减少外汇支出都有重要意义。甜叶菊糖甙主要产于甜叶菊的叶片。

关键词：甜叶菊斑枯病叶片产量

Guiding of 150 keV O^(6+) ions through nanocapillaries in an uncoated Al_2O_3 membrane:special time dependence of the transmission profile width

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Chinese Physics B 2009年第5期18卷 1955-1960页

作者：陈熙萌席发元邱玺玉邵剑雄肖国青崔莹孙光智王俊陈益峰刘会平尹永智王瑜玉李德慧娄凤君王兴安徐俊奎周春林 School of Nuclear Science and Technology Lanzhou University Institute of Modern Physics Chinese Academy of Sciences

This paper reports that the transmission of O6＋ ions with energy of 150keV through capillaries in an uncoated Al2O3 membrane was measured, and agreements with previously reported results in general angular distribution of the transmitted ions and the transmission fractions as a function of the tilt angle well fitted to Gaussian-like functions were observed. Due tousing an uncoated capillary membrane, our φc is larger than that using a gold-coated one with a smaller value of Ep/q, which suggests a larger equilibrium charge Q∞ in our experiment. The observed special width variation with time and a larger width than that using a smaller Ep/q were qualitatively explained by using mean-field classical transport theory based on a classical-trajectory Monte Carlo simulation.

关键词： guiding effect Al2O3 nanocapillaries uncoated membrane transmission profile width

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薄皮甜瓜杂交制种技术

种子世界 1998年第4期 34-34页

作者：李德泽贾健娄凤君徐光哈尔滨市种子公司黑龙江省农场总局种子公司黑龙江省齐齐哈尔市蔬菜研究所

甜瓜杂交制种技术与西瓜、西葫芦不同,甜瓜的结实花为两性完全花,授粉时母本的结实花需先人工去雄,若在去雄授粉过程中操作不严格,极易出现伪杂交,为提高甜瓜制种纯度,提出以下几点技术建议,供参考。1 父本、母本田必须隔离种植甜瓜是... 详细信息

甜瓜杂交制种技术与西瓜、西葫芦不同,甜瓜的结实花为两性完全花,授粉时母本的结实花需先人工去雄,若在去雄授粉过程中操作不严格,极易出现伪杂交,为提高甜瓜制种纯度,提出以下几点技术建议,供参考。1 父本、母本田必须隔离种植甜瓜是雌雄同株虫媒花作物。结实花为两性完全花,能正常授粉结实产籽。传统的制种方法是将父母本按1:4种植同一地块,授粉前一天下午将父本雄花套袋,母本结实花去雄供第2天授粉,若雄花套袋不及时或套袋后被风吹歪,

关键词：杂交制种技术甜瓜母本亲本父本雄花

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棚室黄瓜早期密植后期稀植栽培技术

现代化农业 1997年第6期 19-19页

作者：娄凤君朱洁瑶高占军张淑华龚健鸿黑龙江省农垦总局种子公司哈尔滨150088

Interaction of O^3＋ Ions with Al2O3 Nanocapillaries

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Chinese Physics Letters 2008年第12期25卷 4255-4257页

作者：陈熙萌王俊王兴安孙光智陈益峰席发元邵剑雄崔莹丁宝卫徐俊奎娄凤君尹永智周春林邱玺玉 School of Nuclear Science and Technology Lanzhou University Lanzhou 730000

We investigate angular distributions of the transmitted 60 keV and 120 keV O^3＋ ions through nanocapillaries with 50hm diameter and 10μm length. The experimental results are in agreement with the ＇guiding effect＇ found by Stolterfoht et al. For different tilted angles of the nanocapillary membrane with respect to the beam, the angular distributions of the transmitted ions are measured by a one-dimensional micro-channel plate （MCP） detector. Moreover, the dependence of this guiding effect on the projectile energy is studied.

关键词： field emission molybdenum dioxide enhancement factor

Guiding of 60 keV O^6＋ Ions through Nanocapillaries in an Uncoated Al2O3 Membrane

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Chinese Physics Letters 2008年第12期25卷 4348-4351页

作者：陈熙萌席发元邱玺玉邵剑雄崔莹孙光智王俊陈益峰刘会平尹永智娄凤君王兴安徐俊奎周春林 School of Nuclear Science and Technology Lanzhou University Lanzhou 730000

We measure the transmission of O^6＋ ions with a higher energy of 60 keV （in turn a higher value of Ep/q） through capillaries in an uncoated AI2 03 membrane, and obtain agreements with previously reported results in general angular distribution of the transmitted ions and the transmission profile width variation with capillary tilt angle. The transmission fractions as a function of the tilt angle can be fitted to the semi-empirical Gaussian-like function well. Due to using uncoated capillary membrane, our ψc is larger than that using gold-coated one, in spite of our larger value of Ep/q, which suggests a larger equilibrium charge Q∞ in our experiment.

关键词： field emission molybdenum dioxide enhancement factor