arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2202.11215nucl-th
收藏

μ子俘获的核激发

Nuclear Excitation by Muon Capture

Simone Gargiulo, Ming Feng Gu, Fabrizio Carbone, Ivan Madan

备注：
15 pages, 4 Figures and 2 Tables
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

通过实光子或虚光子的交换有效地激发原子核对于核科学和技术的发展具有根本的重要性。在这里，我们提出了一个新的机制，核激发的基础上捕获的自由μ子进入原子轨道（NE $μ$ C）。这样一个新的过程的截面使用Feshbach投影算子形式主义和其他已知的激发现象，即光激发和核激发的电子捕获（NEEC），显示高达十个数量级的增加截面进行评估。NE $μ$ C对于由于μ子与核的更强结合而变得可获得的MeV激发特别有趣。介绍了对柔性原子程序（FAC）的最新修改，计算了μ子原子的结合能。对现代μ介子生产设施背景下的实验方案进行的分析表明，对于选定的同位素，可以检测到这种效应。在基于波束的场景中，NE $μ$ C的总概率被预测为每个入射μ子的$ P \approx 10^{-6}$。鉴于μ子提供的高跃迁能量，NE $μ$ C可以对异构体进料和粒子诱导裂变产生重要影响。

英文摘要：

Efficient excitation of nuclei via exchange of a real or virtual photon has a fundamental importance for nuclear science and technology development. Here, we present a new mechanism of nuclear excitation based on the capture of a free muon into the atomic orbits (NE$μ$C). The cross section of such a new process is evaluated using the Feshbach projection operator formalism and compared to other known excitation phenomena, i.e. photo-excitation and nuclear excitation by electron capture (NEEC), showing up to ten orders of magnitude increase in cross section. NE$μ$C is particularly interesting for MeV excitations that become accessible thanks to the stronger binding of muons to the nucleus. The binding energies of muonic atoms have been calculated introducing a state of the art modification to the Flexible Atomic Code (FAC). An analysis of an experimental scenarios in the context of modern muon production facilities shows that the effect can be detectable for selected isotopes. The total probability of NE$μ$C is predicted to be $ P \approx 10^{-6}$ per incident muon in a beam-based scenario. Given the high transition energy provided by muons, NE$μ$C can have important consequences for isomer feeding and particle-induced fission.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑