研究光子核反应与阿尔法颗粒的辐射在,和的研究
M V Zheltonozhskaya1, P D Remizov1, A P Chernyaev1
1Lomonosov Moscow State University, Russian Federation.
概括
产生医学同位素的光子核反应至关重要. 这项研究揭示了N=50外对α粒子排放产量的重大影响,为新的同位素生产方法铺平了道路.
科学领域:
- 核物理 核物理 核物理
- 放射化学 放射化学是指辐射化学.
背景情况:
- 发射带电粒子的光子核反应,如质子和α粒子,由于库伦屏障,比中子发射研究较少.
- 这些反应对于生产医学同位素和理解核结构,特别是魔法数字的影响至关重要.
研究的目的:
- 通过实验确定天然,和的 (γ,αn) 反应的加权平均产量.
- 为了研究封闭的N=50外对光子核反应中的α粒子排放的影响.
- 探索库伦屏障以下 (γ,αn) 反应的半直接机制的主导地位.
主要方法:
- 用bremsstrahlung gamma-quanta对天然,和样品进行辐射.
- 在20 MeV边界能量下测量 (γ,αn) 反应的加权平均产量.
- 分析实验数据以确定核外结构和反应机制的影响.
主要成果:
- 首次确定了天然,和的 (γ,αn) 反应的加权平均产量.
- 观察到封闭的N=50外对与α粒子排放反应产量的显著影响.
- 发现半直接机制在库伦屏障以下的 (γ,αn) 反应中占主导地位.
结论:
- 该研究提供了关于带有电荷粒子排放的光子核反应的新型实验数据.
- 这些发现凸显了N=50外封闭在影响α粒子排放产量的重要性.
- 在94Mo上的 (γ,αn) 反应显示出使用电子加速器生产医疗放射性核酸89Zr的前景.
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