Weidner J W, Mashnik S G, John K D, Hemez F, Ballard B, Bach H, Birnbaum E R, Bitteker L J, Couture A, Dry D, Fassbender M E, Gulley M S, Jackman K R, Ullmann J L, Wolfsberg L E, Nortier F M
Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Appl Radiat Isot. 2012 Nov;70(11):2602-7. doi: 10.1016/j.apradiso.2012.07.006. Epub 2012 Jul 11.
Cross sections for (223,)(225)Ra, (225)Ac and (227)Th production by the proton bombardment of natural thorium targets were measured at proton energies below 200 MeV. Our measurements are in good agreement with previously published data and offer a complete excitation function for (223,)(225)Ra in the energy range above 90 MeV. Comparison of theoretical predictions with the experimental data shows reasonable-to-good agreement. Results indicate that accelerator-based production of (225)Ac and (223)Ra below 200 MeV is a viable production method.
在低于200 MeV的质子能量下，测量了质子轰击天然钍靶产生（223）Ra、（225）Ra、（225）Ac和（227）Th的截面。我们的测量结果与先前发表的数据高度吻合，并给出了90 MeV以上能量范围内（223）Ra、（225）Ra完整的激发函数。理论预测与实验数据的比较显示出合理到良好的一致性。结果表明，在200 MeV以下基于加速器生产（225）Ac和（223）Ra是一种可行的生产方法。
