Roberts A D, Geddes C G R, Matlis N, Nakamura K, O'Neil J P, Shaw B H, Steinke S, van Tilborg J, Leemans W P
Department of Physics and Astronomy, Minnesota State University, Mankato, MN 56001, USA.
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
Appl Radiat Isot. 2015 Feb;96:122-128. doi: 10.1016/j.apradiso.2014.11.008. Epub 2014 Nov 14.
(99)Mo photonuclear yield was measured using high-energy electrons from Laser Plasma Accelerators and natural molybdenum. Spectroscopically resolved electron beams allow comparisons to Monte Carlo calculations using known (100)Mo(γ,n)(99)Mo cross sections. Yields are consistent with published low-energy data, and higher energy data are well predicted from the calculations. The measured yield is (15±2)×10(-5) atoms/electron (0.92±0.11 GBq/μA) for 25 mm targets at 33.7 MeV, rising to (1391±20)×10(-5) atoms/electron (87±2 GBq/μA) for 54 mm/ 1.7 GeV, with peak power-normalized yield at 150 MeV.
使用来自激光等离子体加速器的高能电子和天然钼测量了钼的光核产额。光谱分辨电子束使得能够与使用已知的钼-99（γ，n）钼-99截面的蒙特卡罗计算结果进行比较。产额与已发表的低能数据一致，并且高能数据可通过计算得到很好的预测。对于33.7兆电子伏特下25毫米的靶，测量产额为（15±2）×10⁻⁵原子/电子（0.92±0.11吉贝可/微安），对于54毫米/1.7吉电子伏特的情况，产额升至（1391±20）×10⁻⁵原子/电子（87±2吉贝可/微安），在150兆电子伏特处有峰值功率归一化产额。
