寻求提高核数据的质量,比如半衰期,过渡产量,和反应截面,是核科学各个领域的共同努力。48V是钒同位素,需要有关中子反应截面的实验数据。然而,传统的同位素生产技术无法产生具有足够高的同位素纯度的48V用于其中一些测量。稀有同位素束设施(FRIB)的“同位素收获”是一种新的同位素生产技术,可能会产生48V,并具有进行此类研究所需的纯度。在这种情况下,收集48Cr并使其产生48V,其可以与未腐烂的48Cr分离以产生高纯度的48V。因此,通过同位素收获产生纯48V的任何方案将涉及利用可以有效分离48Cr和48V的分离技术。在这项研究中,放射性示踪剂51Cr和48V用于开发可能的放射化学分离方法,通过这种新颖的同位素生产方法可以转化为高纯度的48V。开发的方案利用离子交换或萃取色谱树脂。用AG1-X8阴离子交换树脂分离51Cr和48V,回收率分别为95.6(26)%和96.2(12)%,放射性核素纯度为92(2)%和99(1)%。使用萃取色谱树脂(TRU树脂)和10MHNO3负载溶液可获得更有效的Cr和V分离。这里,51Cr和48V的回收率分别为94.1(28)%和96.2(13)%,在小体积(8.81(8)mL和5.39(16)mL)中具有高放射性核素纯度(100(2)%和100(1)%)。这项研究表明,为了最大限度地提高48V的产量和同位素纯度,最好的生产方案包括利用TRU树脂和10MHNO3的两次分离来分离48Cr并纯化产生的48V。
The quest to improve the quality of nuclear data, such as half-lives, transition yields, and reaction cross-sections, is a shared endeavor among various areas of nuclear science. 48V is a vanadium isotope for which experimental data on neutron reaction cross-sections is needed. However, traditional isotope production techniques cannot produce 48V with high enough isotopic purity for some of these measurements. \"Isotope harvesting\" at the Facility for Rare Isotope Beams (FRIB) is a new isotope production technique that could potentially yield 48V with the necessary purity for such studies. In this case, 48Cr would be collected and allowed to generate 48V that can be separated from undecayed 48Cr to yield highly pure 48V. Thus, any protocol for producing pure 48V via isotope harvesting would involve utilizing a separation technique that can effectively separate 48Cr and 48V. In this study, the radiotracers 51Cr and 48V were used to develop possible radiochemical separation methodologies, which can be translated to obtain high purity 48V via this novel isotope production method. The developed protocols utilize either ion exchange or extraction chromatographic resins. Separations of 51Cr and 48V with AG 1-X8 anion exchange resin respectively resulted in recoveries of 95.6(26)% and 96.2(12)% with radionuclidic purities of 92(2)% and 99(1)%. An even more effective Cr and V separation was obtained with an extraction chromatographic resin (TRU resin) and 10 M HNO3 loading solution. Here, 51Cr and 48V respectively had recoveries of 94.1(28)% and 96.2(13)% with high radionuclidic purities (100(2)% and 100(1)%) in small volumes (8.81(8) mL and 5.39(16) mL). This study suggests that, to maximize the yield and isotopic purity of 48V, the best production protocol would involve utilizing two separations with TRU resin and 10 M HNO3 to isolate 48Cr and purify the generated 48V.