Measurement the ^36Cl Depth Content in Soil Near a Nuclear Facility

离子与原子碰撞物理学是利用离子与原子相互作用，通过测量碰撞产物的状态及碰撞产物之间的相关性来研究碰撞机制和过程的一门学科。测量碰撞后的各种反应产物及其截面数据，对于天体物理、重离子物理、受控热核聚变、材料科学、粒子加速器技术及激光技术等许多研究领域都有十分重要的意义。     

Upgrading of the Neutron Powder Diffractometer

The neutron powder diffractometer at Heavy Water Research Reactor （HWRR） in China Institute of Atomic Energy （CIAE） is applied to study crystal and magnetic structures by using powder diffraction. Its key components are collimator system, the crystal monochromator, the sample table, the neutron detector, and the associated electronic system. The quality of the instrument depends on the resolution and the intensity which are constrained to each other.     

Calculation and Evaluation of Neutron-Induced Reactions on ^60Ni Below 150 MeV

Based on the experimental data of total, nonelastic, elastic cross section and elastic scattering angular distributions for n＋^60Ni reactions, a set of neutron optical model potential parameters is obtained in the region of incident neutron energy from 0.456-150 MeV. The reaction cross sections, angular distributions, energy spectra, gamma-ray production cross sections, gamma-ray production energy spectra, are calculated and evaluated by optical model,     

Applications of Skyrme Energy-Density Functional to Fusion Reactions for Synthesis of Superheavy Nuclei

It is of great importance to predict fusion cross sections and to analyze reaction mechanism for massive heavy-ion fusion reactions, especially for fusion reactions leading to superheavy nuclei. In those reactions, the calculation of the capture cross section is of crucial importance. It is known that Wong＇s formula based on one-dimensional barrier penetration can describe the fusion excitation function well for light reaction systems, while it fails to give satisfying results for heavy reaction systems at energies near and below the barrier. For solving this problem, we applied the Skyrme energy-density functional for the first time to study heavy-ion fusion reactions. The barrier for fusion reaction was calculated by the Skyrme energy-density functional together with the semi-classical extended Thomas-Fermi method.     

Study on Reproducibility of Home-Made Personal Bubble Neuron Detectors

Reproducibility is an important parameter of bubble detectors used for personal neutron dose monitoring. This study presents a preliminary analysis on reproducibility of home-made bubble detectors using ISO standards as guidelines. Moreover the software ＂origin＂ was used in an attempt to find possible reasons causing some detectors failed to pass this test.     

Stability of N, N-Dimethylhydroxylamine in Nitric Acid Medium

N, N-dimethyl hydroxylamine （DMHAN） is the reductant used in the Purex process study. Its stability directly influences its application in the Purex process. DMHAN was synthesized, the purity of synthesized DMHAN was analyzed to be 99%, and the synthesized DMHAN meets the needs of the experiment. A titration method for determination of the concentration of DMHAN was established based on the potassium dichromate titration after the ferric oxidation.     

Reaction Between Mono-methylhydrazine and Tc（Ⅶ） in Nitric Acid Medium

Methyl hydrazine （MMH） is a supporting reagent used in the Purex process in order to eliminate nitrous acid in the system. The reaction between MMH and Tc（Ⅶ） in nitric acid medium was studied by extraction method. The influences of temperature, acidity, the concentrations of MMH and pertechnetate on the reaction is investigated. The results indicate that the reaction period is composed of three stages, induction period, fast reaction period and the termination of the reaction.     

Reaction Kinetics Between Mono-methylhydrazine and Nitrous Acid

Mono-methyl hydrazine is one of supporting reagents in the Purex process in order to eliminate nitrous acid in the system. The research on the reaction between them is not found in the literature so far. In order to avoid the possible effect of nitric acid, the oxidation of mono-methylhydrazine by nitrous acidin perchloric acid medium is researched by spectrophotometric method at first.     

Measurement of Negative Ion Current of ^180HfF5^- as a Function of the Ratio of HfF4 to Ag

In Accelerator mass spectrometry （AMS） measurement, it usually need mix metal powder into samples. During ^182Hf measurement, usually we mix HfF4 with certain silver powder. As we found the negative ion current of ^180HfF5^- changes when different proportion of Ag＋HfF4 samples were used. In measurement of ^182Hf we need as larger ^180HfF5^- ion current as possible, so in this work we studied the negative ion current of ^180HfF5^- with different mass ration of Ag to HfF4 samples.     

HYNIC-Anxl3 Labelled With ^99Tc^m for Imaging of Apoptosis

Apoptosis, also known as programmed cell death, is an indispensable component of normal human growth and development, immunoregulation and homeostasis. Apoptosis is nature＇s primary opponent of cell proliferation and growth. In the course of apoptosis, phosphatidylserine （PS） is rapidly exposed on the cell＇s outer surface. Annexin V, an endogenous human protein, has a high affinity for membrane- bound PS. Annexin V, therefore,     

一个质子阻止本领通用计算公式的修正

对非相对论重离子在固体中的电子阻止本领的一个通用计算公式进行了修正，计算了质子在不同原子序数靶材料中的电子阻止本领，并与ＴＲＩＭ程序的计算结果进行了比较，两者符合较好。     

Study of Pairing Interaction in a Separable Force

We adopt Duguet new method, which derives a separable form of the pairing interaction from a complicated pairing interaction in nuclear matter. With a given pairing interaction, one could solve the BCS gap equation and obtain the corresponding gaps at various densities, or Fermi momenta in nuclear matter. The relationship between the gap and the Fermi momentum accounts for the properties of pairing correlations. Duguet suggested a separate expression with a product of two exactly same Gaussian forms and fitted the gap closure of the AV18 bare NN interaction. The expression is extremely simple with only two oarameters.     

65 ^17F质子皮结构研究

本工作利用自洽的Hartree-Fock计算及考虑了Skyrme相互作用的无规相位近似（RPA）计算，研究了质子滴线核^17F的四极相互作用。为了恰当的考虑连续效应，在Green函数坐标空间计算了同时包含了同位旋标量和同位旋矢量相关性的RPA响应函数。     

多玻色子相互作用和高阶项的相消

相互作用玻色子模型(IBM)的成功促使人们探讨它的微观解释,由费米子体系的哈密顿量出发建立S-D空间的玻色映象,或者说建立玻色子体系的等效哈密顿量时,必然要以引入玻色空间的n体算符为代价,因此玻色空间中只包含单体和双体相互作用项的零级近似的正确性(通常IBM的哈密顿量就只包含单体和双体项)就是一个必须讨论的问题。P.F.Bortignon等人曾讨论过多个单极对(Monopole pair)玻色子之间的相互作用问题,从核场论出发证明了三个单极玻色子项(或称三体单极玻色子项)的严格相消。本文拟从对易关系出发过论n个单极费米子对之间的相互作用,并对生成坐标方法所包含的费曼图形作具体计算,分析其中单极对的高阶图形的严格相消性质。最后表明在这种框架下的等效哈密顿量和s-d映射之间的联系。     

多晶在非轴对称梯度下的电四极相互作用（I=4）计算

中间态自旋I=4的放射性核探针,在多晶样品中的非轴对称电四极相互作用,其相互作用频率和扰动函数,与惯常使用的I=5/2核探针的情况不同,为了了解和分析I=4的核探针的扰动角关联(PAC)实验,计算了相互作用哈密顿量的本征值、本征函数,从而得出了电场梯度非轴对称系数η≥0下的扰动衰减系数G_(KA)(t)。     

过程e~ e~-→J/ψ→γB(J~PC),B→P_1P_2的角分布和B的自旋分析

本文给出了过程e~ e~-→J/ψ→γB(J~(pc)),B→P_1P_2的通常的螺旋性形式和等效相互作用形式之间的关系,对于B的不同自旋(J=2,4)的角分布显示,为了确定B的自旋,存在敏感区域和不敏感区域。不幸的是θ/f_2(1720)和ξ(2230)的现有数据落入了不敏感区域。     

激光与原子团簇相互作用实验系统的建立

研究建立了激光与原子团簇相互作用的实验系统。该系统包括团簇产生系统、真空系统、激光与团簇同步系统、聚焦系统，以及激光与团簇相互作用诊断设备。给出了系统性能测试结果。 