Study of 3He-induced reactions and elastic scattering on light isotopes: Measurement, benchmarking and theoretical investigation of differential cross sections suitable for Ion Beam Analysis.

本提案旨在通过测量~3He诱导反应和弹性散射的不同截面，为离子束分析领域做出重要贡献，适用于应用NRA和EBS技术进行轻同位素的深度剖析。用3He作为探测束的材料分析显示出明显的优点，主要是由于涉及的微分截面和Q值相对较高，导致大多数轻同位素的同时激发具有更高的灵敏度和准确度，同时，不需要采取特殊的辐射安全措施，例如在氚引发的反应中，由于从各种反应通道发射的中子和/或氚的分裂，必须采取某些预防措施。这项研究的主要目标将是：(A)在适当(低)能量和多个后向角下，以尽可能高的精度测量一些3He诱导的反应和对轻同位素的弹性散射的微分截面，(B)随后使用成分已知的高纯度、富同位素的厚靶对所获得的结果进行基准比较，以及(C)在R矩阵理论的框架内结合DWBA计算对实验数据进行解释。

The present proposal aims at providing an important contribution in the field of Ion Beam Analysis via the measurement of differential cross sections of 3He-induced reactions and elastic scattering, suitable for the application of the NRA and EBS techniques for the depth-profiling of light isotopes. Material analysis with 3He as the probing beam presents the distinct advantage of causing the simultaneous excitation of most light isotopes with enhanced sensitivity and accuracy, mainly due to the relatively high differential cross sections and Q-values involved, while at the same time, there is no need for special radiation safety precautions, as in the case of deuteron-induced reactions where certain precautions are indispensable due to the neutrons emitted from various reaction channels and/or the deuteron breakup. The principal objectives of this study will be: (a) The measurement, with the highest possible precision, of the differential cross sections of a number of 3He-induced reactions and elastic scattering on light isotopes, at suitable (low) energies and at multiple backward angles, (b) the subsequent benchmarking of the obtained results using high-purity, isotopically-enriched thick targets of accurately known composition and (c) the interpretation of the experimental data in the framework of the R–matrix theory, along with DWBA calculations.