Experimental survey of the (d -->, t) reaction at Ed=200 MeV
Experimental survey of the (d -->, t) reaction at Ed=200 MeV
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Ed=200 MeV 时 (d -->, t) 反应的实验研究
DOI：
10.1103/physrevc.50.2935
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发表时间：
1994
影响因子：
3.1
通讯作者：
S. Y. Werf
中科院分区：
文献类型：
--
作者：
J. Wiele;H. Langevin;F. Jourdan;J. Guillot;E. Gerlic;L. Rosier;A. Willis;C. Djalali;M. Morlet;E. Tomasi;N. Blasi;S. Micheletti;S. Y. Werf
在200 MeV轰击能量下，测量了Sn 120，Sn 116，Zr 90，Ni 58，O 16和C12上（d→，t）反应的微分截面，矢量和张量分析本领.在相同的能量下，对Sn 116和Pb 208进行了氘弹性散射测量。这些数据已被分析与以前的Ni 58和O 16得到最佳拟合的光学参数描述氘的弹性散射。（d→，t）实验调查涉及28个跃迁填充众所周知的价态，包括以前的数据在铅207和硅27。矢量和张量分析能力表现出惊人的相似性，在不同的核中测量的过渡。角分布被发现强烈依赖于中子形状因子中节点的数量以及自旋和角动量的耦合j−= l-1/2与j+= l+ 1/2。对于n= 1跃迁的两种分析功率，j效应尤其明显。不同核的微分截面的斜率主要取决于节点数。精确的有限范围计算，包括S和D组件已被执行，使用两套氘核参数连同深triton势。这两种分析再现相当不错的微分截面和目前采用的光谱因子。用氘参数拟合弹性散射数据的常规分析，对n> 1跃迁（l= 0，1，2）的分析能力较好地再现，但对n= 1跃迁的分析能力不一致（j+ Ay y值除外）。良好的或定性的协议是实现所有的过渡与第二氘核的潜力，其特征在于较大的自旋轨道项和一个额外的虚张量项。这允许使用反应作为光谱工具。
Differential cross sections, vector and tensor analyzing powers of the (d→, t) reaction on Sn 120, Sn 116, Zr 90, Ni 58, O 16, and C 12 have been measured at 200 MeV bombarding energy. Deuteron elastic scattering measurements have been performed on Sn 116 and Pb 208 at the same energy. These data have been analyzed together with previous ones on Ni 58 and O 16 to get best fit optical parameters describing deuteron elastic scattering. The (d→, t) experimental survey bears on 28 transitions populating well known valence levels, including previous data in Pb 207 and Si 27. The vector and tensor analyzing powers exhibit striking similarities for transitions measured in different nuclei. The angular distributions are found to strongly depend on the number of nodes in the neutron form factor and on the coupling of spin and angular momentum j−= l-1/2 versus j+= l+ 1/2. The j effect is especially pronounced, for both analyzing powers for n= 1 transitions. The slopes of the differential cross sections in different nuclei depend mainly on the number of nodes. Exact finite range calculations including S and D components have been performed, using two sets of deuteron parameters together with a deep triton potential. Both analyses reproduce rather well the differential cross sections and currently adopted spectroscopic factors. The conventional analyses with deuteron parameters fitting elastic scattering data reproduce rather well analyzing powers of n> 1 transitions (with l= 0, 1, 2), but disagree with the data for n= 1 transitions (except for j+ A y y values). Good or qualitative agreement is achieved for all transitions with the second deuteron potential, characterized by larger spin orbit terms and an additional imaginary tensor term. This allows using the reaction as a spectroscopic tool.