Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms ( IF 1.3 ) Pub Date : 2020-04-29 , DOI: 10.1016/j.nimb.2020.04.025 Gizem Akkaya , Haluk Yücel , Mustafa Güray Budak
In this study, it is aimed to investigate neutron self-shielding effect in application of k0-NAA standardization method to determine Mn contents in manganese ores. Because the neutron self-shielding correction factors are significant factors in application of k0-NAA method for large samples. To estimate these, several Mn-ore samples and Au monitor were irradiated separately in a 37 GBq 241Am–Be neutron source irradiation unit and then they were measured by using a 78.5% relative efficient HPGe detector. In this study, the sigmoid function approaches for calculation of Gth and Ge factors were applied for the right cylinder sample geometry at known elemental compositions in samples, determined by EDXRF technique with a 25 mm2 Silicon Drift Detector (SDD). The present results indicate that k0-NAA method is applicable successfully to determine Mn contents in Mn-ore samples providing that Gth and Ge factors are estimated accurately even if a low-flux isotopic neutron source is used.
中文翻译:
应用k 0 -NAA标准化方法测定锰矿石中锰含量的中子自屏蔽校正
本研究旨在研究中子自屏蔽效应在应用k 0 -NAA标准化方法测定锰矿石中锰含量的过程中的作用。由于中子自屏蔽校正因子是k 0 -NAA方法在大样本应用中的重要因素。为了估算这些,在37 GBq 241 Am–Be中子源辐照装置中分别辐照了几个锰矿石样品和Au监测器,然后使用相对效率为78.5%的HPGe检测器进行了测量。在这项研究中,S形函数用于计算趋近ģ日和葛通过使用25 mm 2硅漂移检测器(SDD)的EDXRF技术确定的样品中已知元素组成,将合适的因子应用于合适的圆柱样品几何形状。目前的结果表明中K 0 -NAA方法适用成功确定锰矿样品中锰含量提供ģ日和ģ Ë因素即使使用低通量同位素的中子源准确地估计。