共查询到20条相似文献,搜索用时 15 毫秒
1.
2.
SU Jun LI Zhi-hong LIAN Gang WANG You-bao GUO Bing ZENG Sheng YAN Sheng-quan WANG Bao-xiang BAI Xi-xiang LIU Wei-ping 《中国原子能科学研究院年报》2005,(1):96-98
理论上存在着两种矛盾的预言,即通过碰撞核相对运动与破裂道的耦合使全熔合截面压低或增强。最近,Hagino作了一改进的耦合道模型计算,试图调和两种相冲突的处理。他的理论处理预言结果,在库仑位垒以下能区破裂使全熔合截面增强,而在垒上能区,破裂使全熔合截面压低。不同的理论预言,需要精确可靠的实验作判断。 相似文献
3.
ZENG Sheng LI Zhi-hong LIAN Gang WANG You-bao SU Jun YAN Sheng-quan WANG Bao-xiang GUO Bing BAI Xi-xiang LIU Wei-ping 《中国原子能科学研究院年报》2006,(1):110-111
Explosive hydrogen burning occurs in very massive (M≥ 10^5-10^8M) star with high temperature and density. Hot pp chain, hot CNO, hot NeNa-MgAl chain and the flowing rp ap process will play a prominent role in hydrogen burning as the temperature goes higher. When the temperature of the star is higher than 10^8 K, high temperature CNO chain is dominant in hydrogen burning, 相似文献
4.
5.
6.
7.
8.
9.
10.
《中国原子能科学研究院年报(英文版)》2000,(1)
8Liisatypicalneutron-skinnucleuswithahalf-lifeof838msandaneutronseparatioenergyof2.033MeV.Usinga8Libeam,onecanstudythereactionsrelevanttonuclearhalostructure,aswellastheimportantprimordialastrophysicsreactionssuchasd(8Li,9Li)p.Tomakethosemeasurementsfeasi… 相似文献
11.
金孙均 王友宝 苏俊 颜胜权 李云居 郭冰 李志宏 曾晟 连钢 白希祥 柳卫平 山口英齐 久保野茂 胡钧 D.Kahl 郑孝顺 文俊永 寺西高 王宏伟 石山博信 岩佐直人 小松原哲郎 李二涛 张健 《原子能科学技术》2014,48(12):2182-2186
在日本东京大学核研究中心的放射性离子束分离器上,利用逆运动学反应1H(22Ne,22Na)n产生了22Na次级束。经分离器电磁系统的分离提纯后,获得了能量为(78.3±1.0) MeV的22Na次级束。实验靶站处次级束的强度达2.5×105 s-1,其中22Na的纯度好于90%。22Na次级束已应用于与核天体物理Ne丰度异常问题相关的22Na+α共振散射实验研究。 相似文献
12.
《中国原子能科学研究院年报(英文版)》2001,(1)
Production of high beam H and axial injection with high efficiency is one of key problems to be solved for building-up a high beam cyclotron. This project is to modify an existing test stand of axial injection system including beam dynamic calculation, key structure redesign, power supply system upgrade, cesium gas injection, et al. It is planed to increase the beam current of H- ions to more than 10 mA and improve the beam quantity clearly in about two years. 相似文献
13.
在CIAE-30加速器上建立了用于制备高纯度123I的124Xe气体靶系统。该系统包括124Xe气体靶站和与之相连的30 MeV质子束流传输线、靶密封窗和束流线真空窗的He冷却循环系统、水冷却系统、靶腔真空系统、124Xe处理系统和123I化学处理系统,以及外围的124Xe气体保留系统、液氮传输系统、氦气配送系统和124Xe气体补充系统,还有辐射防护和检测系统、加速器束流调节、测量和气体靶控制系统。系统调试及批量试生产结果显示,该系统生产123I的批产能达111~148 GBq(3~4 Ci),产额大于296 MBq/(μA•h) (8 mCi/(μA•h))。123I核纯度大于99.8%,放化纯度大于95%,满足规模化生产的要求。 相似文献
14.
DUAN Jun-feng YAN Yu-liang ZHANG Jing-shang 《中国原子能科学研究院年报》2005,(1):111-111
A new reaction model for light nuclei of lp shell is expanded to ^19F with 2s-ld shell nucleus. The double-differential cross sections of total outgoing neutron for n+^19F reactions at En = 14.2 MeV are calculated and analyzed, and the calculated results agree fairly well with the experimental measurements. 相似文献
15.
16.
17.
18.
QIU Jiu-zi JIANG Shan HE Ming YIN Xin-yi DONG Ke-jun GUAN Yong-jing WU Shao-yong YUAN Jian YANG Bing-fan 《中国原子能科学研究院年报》2005,(1):120-121
^82Hf is a long-lived radionuclide of particular interest for the early history of the solar system The measurement of ^182Hf has been performed with a 13 MV tandem accelerator(HI-13) mass spectrometry at China Institute of Atomic Energy. 相似文献
19.
20.
GUAN Yong-jing HE Ming JIANG Shan RUAN Xiang-dong WANG Hui-Juan WU Shao-yong DONG Ke-jun 《中国原子能科学研究院年报》2005,(1):119-119
Some improvements of the gas-filled time-of-flight detector system were achieved. The thickness of the entrance window is decreased to 0.5 micron. A larger area surface barrier detector with the diameter of 40 mm was used to enlarge the detection efficiency. The detection efficiency is higher than 70%. 相似文献