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THE CROSS-SECTION MEASUREMENTS FOR 59Co(n,p)59Fe,59Co(n,α)56Mn AND 59Co(n,2n)58Co REACTIONS 下载免费PDF全文
LI Ting-Yan SHI Zhao-Min LU Han-Lin ZHAO Wen-Rong YU Wei-Xiang YUAN Xia-Lin 《中国物理C(英文版)》1990,14(6):542-550
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. 相似文献
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Spectra and angular distributions of the(α,d)reactions on 56Fe 57Fe and 59Co have been measured with the △E-E telescopic systems and Q3D magnetic spectrometer at a bombarding energy of 35MeV from the HI-13 Tandem,and analyzed with microscopic DWBA.Among the angular distributions of nine levels strongly populated by 56Fe(α,d)58Co reaction, the experimental data of 6.79MeV and 6.4MeV levels in 58Co were analyzed and discussed. The highest stretched configuration (1g9/2,1g9/2)9 was found and Jπ=1+ of 6.4MeV level was determined for the first time. No isolated stretched states were observed by 57Fe 59Co(α,d)reactions.This probably means that the strength of the stretched configuration spreads on a number of states. 相似文献
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用790MeV136Xe轰击56Fe靶,测量了类靶碎片的质量数和原子序数。探测且鉴定了四个丰中子同位素54Ti,56V,57V,58Cr。同时提供了55Ti,58V,59Cr存在的可能性。使用西德重离子研究中心的磁谱仪和磁分析一起进行了飞行时间和ΔE-E测量,同位素鉴定是可靠的。 相似文献
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在82.7MeV 16O+27Al反应的类弹碎片和发射α粒子的符合测量中, 得到了在速度平面上的类弹碎片C和α粒子符合的伽利略协变截面的等高图和符合关联角分布. 测到的关联α粒子在正角度区(与类弹产物在束流的同侧)主要来源于类弹发射; 在负大角区主要来源于类靶发射; 在负小角区主要是弹核16O碎裂的贡献. 提出了弹核碎裂后的余核在靶核作用下继续进行阻尼碰撞的反应机制的可能性. 同时也确定了单举DIC测量时强的碳碎片产额中, 来自DIC激发的16O发射α粒子的余核12C的贡献并不大. 相似文献
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我们测量了31.2MeV的α粒子对10,11B的散射角分布,结果表明在10B核上有反常现象;在11B则无反常现象。我们采用了光学模型加雷奇极模型进行了计算和分析,结果表明,对于1p壳核,诸如α+16O,计算结果与实验测量很好符合,而对于α+10B则不成功。采用双v次幂光学模型分析时,对于α+16O的符合程度稍次于前者的结果;对于α+10B仅能定性符合。众所周知,上述模型对于α+40Ca的分析与实验结果的符合是十分好的。由此可以得出结论:2s-1d壳核与1p壳核的大角反常散射的机制不同;同时也表明1p壳核的反常散射机制亦有差异。 相似文献
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SHEN Wen-Qing YIN Shu-Zhi GUO Zhong-Yan ZHU Yong-Tai CHEN Ju-Shen WU En-Jiu GUO Chi-Di FENG En-Pu XIE Yuan-Xiang 《中国物理C(英文版)》1984,8(5):628-632
The angular distributions of the elastic scattering for reaction 12C+28Si have been measured at the energies 69.5MeV, 66MeV, 59MeV, 56MeV using the large area position sensitive ionization chamber. The experimental data are fitted by use of the optical model. The probable reasons of the enhancement and oscillation of the elastic scattering angular distribution are discussed. 相似文献
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The energy spectra of the alpha particles from the reaction 141Pr (n, α) 138La at 0°, 30°, 60°, 120°, 150° and 180° are measured and the angular distributions of the alpha particles are given. It shows that the predominant mechanism of the reaction at En=14 MeV is precompound emission. 相似文献
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本文报道了用71.5MeV的12C重离子轰打159Tb、Ag和89Y靶, 测出了发射α粒子的能谱和角分布, 以及发射氘和质子的一些角分布. 所测到的α颗子能谱为钟罩形连续谱, 其最可几能量接近于库仑位垒. 对于159Tb靶和Ag靶, α粒子角分布在近于擦边角处成峰; 而对89Y靶, 从最小测量角(40°)开始, 微分截面随角度增加单调下降. α粒子发射截面均远远大于统计级联蒸发截面值. 发射质子与氘的角分布, 均随角度增加呈指数下降趋势, 它表现出前平衡发射的特征. 相似文献
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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 下载免费PDF全文
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. 相似文献