New neutron field of the compact accelerator-driven fast neutron source based on the cyclotron and beryllium target station was studied and developed at the NPI CAS. Neutrons were generated using the deuteron bombardment on 8 mm thick beryllium layer by the 10.3 MeV deuteron beam. Broad neutron energy spectra of the d(10)+Be source reaction at two source-to-sample distances (14 mm and 154 mm) were determined for the first time at the NPI. Sets of eight activation materials comprising Au, Co, Ti, In, Al, Fe, Ni, and Nb were irradiated in the d(10)+Be neutron field, and activated dosimetry foils were analysed using the nuclear gamma-spectroscopy technique (HPGe detector) and reaction rates were measured. Neutron energy spectra of the d + Be source reaction for 10.3 MeV deuterons were reconstructed employing the modified version of the SAND-II unfolding code. For 9.7 μA deuteron beam, the fast neutron flux of developed d(10)+Be neutron field reached the value of 1.4 × 10¹⁰ cm⁻²s⁻¹ at a distance of 14 mm from the source target and 4.1 × 10⁸ cm⁻²s⁻¹ at a distance of 154 mm. The novel d(10)+Be neutron field with energy range up to 15 MeV is convenient for neutron cross-section data validation, experimental simulation of the fast neutron spectrum of experimental nuclear reactors, applications of neutron activation analysis, and radiation hardness tests of materials important for nuclear energetics.

NPI CAS研究开发了基于回旋加速器和铍靶站的紧凑型加速器驱动快中子源的新中子场。中子是通过 10.3 MeV 的氘核束在 8 毫米厚的铍层上轰击产生的。在 NPI 上首次确定了 d(10)+Be 源反应在两个源到样品距离（14 毫米和 154 毫米）下的宽中子能谱。在 d(10)+Be 中子场中照射包含 Au、Co、Ti、In、Al、Fe、Ni 和 Nb 的八组活化材料，并使用核伽马光谱技术 (HPGe) 分析活化的剂量测定箔检测器）和反应速率。10 d + Be 源反应的中子能谱。使用 SAND-II 展开代码的修改版本重建了 3 MeV 氘核。9.7 μ A 氘核束，发展的 d(10)+Be 中子场的快中子通量 在距源目标 14 mm 和 4.1 × 10 ⁸  cm ^-处达到 1.4 × 10 ¹⁰  cm ^-2 s ^-1的值² s ^-1 在 154 mm 的距离。能量范围高达 15 MeV 的新型 d(10)+Be 中子场便于中子截面数据验证、实验核反应堆快中子谱的实验模拟、中子活化分析的应用和辐射硬度测试。核能学的重要材料。