d+6Li散射态的QRGM分析

本文利用工作[1]中得到的结果, 即⁶Li集团结构显著和可以略去与α集团的反对称交换效应, 计算了d+⁶Li的弹性散射相移和微分截面. 这个工作表明, 在d+⁶Li弹性散射中, 也可以忽略与α集团的反对称交换效应, 而得到与严格的共振群方法基本一致的结果.     

6Li的集团结构态间的跃迁

本文用含有p态激发的双阱集团壳模型波函数,计算了⁶Li的集团结构态间的约化跃迁几率B（E2）和均方根半径2>^1/2,得到与LCCO相近的结果。     

n ~6Li散射态中~6Li的集团结构和交换效应

本文用略去α集团外核子与α内核子交换的共振群方法计算了n ~6Li系统的弹性散射相移和微分散射截面,并通过这些计算研究了~6Li的d α集团结构和反对称交换效应。所得的结果表明,~6Li的d α集团结构显著,因此合理地选取~6Li的d α集团波函数,特别是d与α的相对运动波函数是很重要的;由于~6Li的d α集团结构显著,且α束缚得很紧,所以略去了α与n和d之间的反对称交换能得到与冗长的标准共振群方法相一致的结果。     

6Li基态中氘的压缩和变形

本文用双位阱壳模型投影交分方法对⁶Li基态进行计算.计算说明,⁶Li基态中氘的方均根半径比自由氘核的方均根半径小;随着氘核集团同a集团的平均间距的减小,氘核集团表现出先压缩而后稍膨胀的压缩效应和先呈扁形而后呈拉长形的变形效应.计算初步地说明了,核力的奇宇称态排斥分量和集团间核子的包利交换效应,无论在⁶Li基态的集团结构中和氘核集团的压缩和变形效应中都起着重要作用.     

6Li的d-α集团结构态的相移分析和广义本征值分析

本文用含有软排斥心势和自旋-轨道非中心势的核子-核(N-N)力和具有d-α集团结构的波函数, 从单道共振群方法(RGM)相移分析和广义本征值分析两方面, 统一研究了⁶Li的(1⁺, 0)基态、(3⁺, 0)第1激发态、、(2⁺, 0)第3激发态、、(1⁺, 0)第5激发态. 结果表明: 从相移分析和相征能量分析两方面都说明了⁶Li的基态主要是l=0的d-α集团结构束缚态, 而第1、3、5激发态主要是l=2的d-α集团结构非束缚态.     

6,7Li核内集团的动量分布

本文用文献[1]给出的^6,7Li核集团结构波函数,求得与阱心距离有关的核内集团动量分布,它与实验结果符合较好;并解释了动量分布的半高度全宽度,随入射粒子能量增高而加宽的现象。     

程函波函数对准自由散射6Li（p,pd）α的应用

近似地用程函波函数作为粒子在原子核作用下的扭曲波函数,分析了入射能量为156MeV、590MeV与670MeV的质子对原子核⁶Li引起的准自由散射⁶Li（p,pd）α。从156MeV的情况可看到,用程函波函数来研究准自由散射所得的结果和用分波法得到的结果同样使人满意。对590MeV与670MeV的情况,所得结果与平面波冲量近似相比有所改进。     

90Nb和91Nb的高自旋态结构

用能量为80MeV的¹⁹F束通过反应⁷⁶Ge(¹⁹F,xn)布居了⁹⁰Nb和⁹¹Nb的高自旋态. 通过在束测量分析⁹⁰Nb和⁹¹Nb退激射线的符合级联关系, 发现了新的属于⁹⁰Nb和⁹¹Nb$的跃迁, 建立了⁹⁰Nb和⁹¹Nb$的高自旋态能级纲图. 通过经验壳模型计算指定了部分能级的组态, 并结合实验DCO比值和与相邻核素的系统比较, 确认了新能级的自旋和宇称.     

87Sr(n, n′)87mSr非弹散射

本文测量了满壳缺一个中子的⁸⁷Sr(n, n′)^87mSr, E_n<2 MeV的非弹散射截面值, 把原有的激发曲线延伸到了低能部分, 构成了一条完整的激发曲线.     

16O+24Mg和20Ne+24Mg弹性散射的机制

本文考虑了两碰撞核间核子结团的转移机制, 解释了象¹⁶O+²⁴Mg和²⁰Ne+²⁴Mg这样一些4N核间的弹性散射微分截面后角振荡上升的反常现象. 在原子核分子轨道模型的理论框架下, 将交换势的强度作为唯一的可调参数, 数值计算较自然地拟合实验结果.     

85Rb(n, 2n)84Rb反应中同质异能态截面比

在14.7MeV中子能量下, 测量了⁸⁵Rb(n,2n)反应同质异能态截面及其比值. 实验比值与Vandenbosh-Huizenga方法算出的理论值做了比较, 定出了自旋切割因子σ值.     

ON THE RELATIVE WAVE FUNCTION OF α-AND d-CLUSTERS IN 6Li

In this paper,we have analyzed the experimental results of the quasifree scattering⁶Li（p,pd）a with E_p=156 MeV.Both PWIA and DWIA are performed.UsingDWIA and the relative wave function proposed by Sakamoto et al.,the results of ourcalculation agree better with the experiment.     

12C+27Al,12C+209Bi和14N+Pb反应全熔合截面测量

本文叙述了用云母径迹探测器分别探测复合核蒸发余核和裂变碎片的实验,从而测出了¹²C+²⁷Al,¹²C+²⁰⁹Bi和¹⁴N+Pb反应的全熔合截面和激发函数.并用锐截止模型由全熔合截面导出了临界角动量.实验结果和当前有关的理论计算进行了比较,在实验误差范围内基本相符.     

π－核双电荷交换反应核谱因子和26Mg(π+, π－)26Si反应

π^－核双电荷交换反应的强度与反应过程的两核子转移的核谱振幅直接联系着. 本文讨论了这类反应与它们的核谱因子的关系. 并以²⁶Mg(π⁺, π^－)²⁶Si为例, 用两种核结构讨论了它的激发函数和微分截面. 我们所用的理论方法能够解释实验数据.     

The Cross Section Measurement for the Reactions of 48,46Ti(n,p) 48,46Sc 50Ti(n,α) 47Ca and 58Ni (n,2n) 57Ni 58Ni(n,p)58m+gCo

The cross sections for the ⁵⁰Ti(n,α)⁴⁷Ca,⁴⁶Ti(n,p)⁴⁶Sc、⁴⁸Ti(n,p)⁴⁸Sc and ⁵⁸Ni(n,2n)⁵⁷Ni ⁵⁸Ni(n,p)^58m+gCo reactions have been measured by using the activation method relative to the cross sections of the ²⁷Al(n,α)²⁴Na reaction in the neutron energy range of 13.50—14.81MeV.The neutron energies were determined by the cross section ratios of the ⁹⁰Zr(n,2N) ^89m+gZr and ⁹³Nb (n,2n) ^92mNb reactions.The results obtained are compared with the published and to be published data of several authors.     

A FURTHER STUDY OF QUASI RESONATING GROUP METHOD—— ANALYSIS OF p+6Li ELASTIC SCATTERING

In this paper,the elastic scattering of p+⁶Li is studied by 3QRGM,a three-cluster RGM omitting the antisymmetrization with the nucleon in the double magic cluster.The main conclusion from studying the systems of p+⁶Li and n+⁶Li is the following:The clustering and exchange effects lower the phase shifts conspicuously.hence they are very important in the lower energy region.     

The Cross Section Measurements for the 100Mo(n2n)99Mo,96Mo(n,p)96Nb and 92Mo(n,α)89m+gZr Reactions

The cross sections for ¹⁰⁰Mo(n2n)⁹⁹Mo,⁹⁶Mo(n,p)⁹⁶Nb and ⁹²Mo(n,α)^89m+gZr have been measured by using the activation method relative to the cross sections of ²⁷Al(n,α)²⁴Na in the neutron energy range 13.40—14.79MeV.The comparison between the values of measured and calculated using theory mode was made.The evaluated excition functions for the three reactions are given.     

14N+58Ni和14N+64Ni深部非弹性反应产物同位素分布的差异

实验测得¹⁴N(93兆电子伏)+⁵⁸Ni、⁶⁴Ni深部非弹性反应产物同位素分布, 发现这两者存在系统性的差异.     

THE CROSS-SECTION MEASUREMENTS FOR 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co REACTIONS

The cross sections of ⁵⁹Co(n,p)⁵⁹Fe,⁵⁹Co(n,α)⁵⁶Mn AND ⁵⁹Co(n,2n)⁵⁸Co reactions have been measured at neutron energy region of 12.8MeV—17.8MeV by activation method.The coveriance matrix of measured errors was calculated,and the comparison between the values of measured and calculated using theory model was made.The evaluated excitation functions for the three reactions are given.     

(EC+β+) Decay of 130Pm and 128Pr

¹³⁰Pm and ¹²⁸ Pr were produced by irradiation of ⁹⁶Ru with 171MeV ³⁶Ar beam,and a He-jet recoil tape transport system transported radioactivities to shielded reigon. Based on X-γ-t and γ-γ-t coincidence measurements ,the (EC+β⁺)decay scheme of ¹³⁰Pm was proposed for the first time and the (EC+β⁺)decay scheme of ¹²⁸Pr was revised.