标题： 中子诱导反应截面在LANSCE上对碳在中子能量高达55 MeV的测量 显示英文标题

标题： Neutron-induced reaction cross section measurements on carbon at neutron energies up to 55 MeV at LANSCE

摘要： 背景：单晶化学气相沉积（sCVD）金刚石探测器提供了一种独特的方法来研究碳上的反应截面，因为它们可以作为活性靶使用。 以前使用这些探测器分析碳上的中子的研究主要集中在低能中子和反应上，其中一些研究的能量分辨率不足以分离具有相似Q值的反应通道的贡献。 目的：这项工作将中子诱导的反应截面测量扩展到更高能量，这与稀有同位素设施相关。 这些测量可用于为需要中子检测的实验的模拟提供信息和基准，特别是那些使用有机闪烁体的实验。 对于一些实验，模拟用于从实验数据中提取物理信息，这加强了对准确模拟的需求。 方法：在LANSCE使用了两个sCVD金刚石探测器作为活性靶，其中通过溅射产生了最高800 MeV的中子。 结果：从入射中子（动能）能量E$_n$ = 12 MeV到55 MeV，报告了$^{12}$C(n,$\alpha_0$)的相对截面，到46 MeV，报告了$^{12}$C(n,d$_0$)的相对截面，以及到27 MeV，报告了$^{12}$C(n,p$_0$)和$^{12}$C(n,p$_1$)的相对截面。 这些测量将这些截面扩展到了比之前研究更高的能量。 总结：在研究重叠的中子能量范围内，本工作与EXFOR数据库中的最新实验数据之间存在良好的一致性。 本工作支持需要使用更近期的数据更新ENDF评估中(n,$\alpha_0$)通道的必要性，并提供了可用于评估(n,p$_0$)、(n,p$_1$)和(n,d$_0$)通道的数据。 这些截面将通过扩展经验截面可用的能量范围来提高模拟的准确性。 显示英文摘要

摘要： Background: Single-crystal chemical vapor deposited (sCVD) diamond detectors offer a unique method to study cross sections of reactions on carbon since they can be used as active targets. Previous studies analyzing neutrons on carbon using these detectors were primarily focused on lower energy neutrons and reactions, and some of these did not have sufficient energy resolution to isolate the contributions of reaction channels with similar Q values. Purpose: This work extends neutron-induced reaction cross section measurements to higher energies, relevant to rare isotope facilities. These measurements can be used to inform and benchmark simulation of experiments that require neutron detection, particularly those utilizing organic scintillators. For some experiments, simulations are used to extract physics information from experimental data, reinforcing the need for accurate simulations. Methods: Two sCVD diamond detectors were used as active targets at LANSCE, where neutrons up to 800 MeV are produced via spallation. Results: Relative cross sections are reported from incident neutron (kinetic) energies E$_n$ = 12 MeV up to 55 MeV for $^{12}$C(n,$\alpha_0$), up to 46 MeV for $^{12}$C(n,d$_0$), and up to 27 MeV for $^{12}$C(n,p$_0$) and $^{12}$C(n,p$_1$). These measurements extend these cross sections to higher energies than those of previous studies. Conclusions: Good agreement is found between this work and recent experimental data from the EXFOR database in the neutron energies where the studies overlap. This work supports the need to update the ENDF evaluation for the (n,$\alpha_0$) channel with more recent data, and provides data that could allow for an evaluation of the (n,p$_0$), (n,p$_1$), and (n,d$_0$) channels. These cross sections will increase the accuracy of simulations by extending the energy range for which empirical cross sections are available.