Reactions of Nickel with Alpha-Particles
Reactions of Nickel with Alpha-Particles
复制标题
镍与α粒子的反应
DOI：
10.1143/jpsj.15.2159
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发表时间：
1960
影响因子：
1.7
通讯作者：
Shigeo Tanaka
中科院分区：
文献类型：
--
作者：
Shigeo Tanaka
在入射能量为40 MeV时，测量了α粒子在Ni 58，Ni 60，Ni 61，Ni 62和Ni 64上诱发反应的激发函数。在r 0 =1.7×10 - 13 cm时，Ni 58的总反应截面与用连续介质理论计算的总反应截面一致.这个和与Igo的α粒子反应截面的光学模型分析结果基本一致，但他的预测值似乎偏高。在Ni 58上（α，α n）反应的激发函数中，在有效阈值（约23 Mev）之后有一个小的“拐点”。对Ni 60上的α粒子反应与Cu 63上的质子反应进行了比较，两种情况下复合核Zn 64是相同的。复合核理论的预测似乎大致成立，严格讨论能量的差异是否显著似乎是不够的。同样的观察在α粒子反应之间的比较。
Excitation functions for the alpha-particle induced reactions on Ni 58 , Ni 60 , Ni 61 , Ni 62 and Ni 64 have been measured at incident energies up to 40 Mev. The sum of the measured cross sections for Ni 58 appears to agree with the total reaction cross section calculated from the continuum theory for r 0 =1.7×10 -13 cm. The sum almost agrees with the optical-model analysis of reaction cross section for alpha-particles by Igo, but his prediction seems to give a little higher value. In the excitation function for the (α, α n ) reaction on Ni 58 , there is a small “knee” immediately after the effective threshold (around 23 Mev). The alpha-particle reactions on Ni 60 have been compared with the proton reactions on Cu 63 , the compound nucleus Zn 64 being the same for two cases. The prediction from the compound nucleus theory seems to hold roughly, and it seems inadequate to discuss strictly whether the discrepancy in energy is significant. The same is observed in the comparison between the alpha-particle re...