STUDY OF THE NUCLEAR PHENOMENA IN THE LOW ENERGY (60-360 keV) PROTON BEAM IMPLANTATION ON METALS

A series of studies on the nuclear interaction and its effects in solids during proton implantation were performed in the energy region between 60 and 360keV. Some charged particle products were observed in the implantation experiments on metal samples such as deuterated titanium, titanium alloy, titanium foil on molybdenum substrate, molybdenum and stainless steel, etc.. The energies of the charged particle products are about 3.9, 5.6 and 8.4MeV, respectively. These particles were identified as alpha particles with both detector telescope and absorption measurements. These three kinds of alpha products were found from different proton sub-barrier reactions. The exciting curve of this reaction increases exponentially with the growth of proton energy in the energy region from 90 to 330keV. The radiation damages induced by the nuclear products in the sample have been studied with scanning electron microscopy technique. The possible surface damages induced by them were observed evidently. The origin of the nuclear reactions and their effect on implantation are discussed.     

奇奇核174Re的转动带

利用重离子熔合蒸发反应¹⁵⁹Tb(²⁰Ne,5n)¹⁷⁴Re,并通过激发函数、KX－γ和γ–γ符合测量,研究了¹⁷⁴Re核的高自旋态.鉴别并指定了¹⁷⁴Re核的一个基于л1/2^－[541]⊙v1/2^－[521]准粒子组态上的双退耦带.还发现了两个分别具有半退耦特征和强耦合特征的转动带,定性地讨论了它们的粒子组态.     

多电子转移研究的符合关联实验测量系统

对近代物理研究所建成的用于研究高电荷态离子与原子碰撞中多电子转移过程的符合关联实验测量系统;该系统的飞行时间谱仪、位置灵敏探测器、多参数数据获取系统分别进行了介绍;给出了利用加速器提供的离子束Ar¹²⁺→Ar调试的反冲氩离子飞行时间谱仪和O²→He离子束调试位置灵敏探测器的实验结果,给出了104keV的Ar⁸⁺+Ar碰撞的最新实验结果,并对Ar⁸⁺+Ar反应的二维关联谱的结果进行了分析,研究鉴定了这一碰撞反应中的多电子转移过程和残余气体引起的多次碰撞.