公开(公告)号：US09528951B2

公开(公告)日：2016-12-27

申请号：US15104279

申请日：2014-12-16

Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION

Inventor： James Tickner ,  Greg Roach

IPC: G01N23/221 ,  G01N23/22 ,  A61B6/00

CPC classification number: G01N23/221 ,  A61B6/4258 ,  G01N23/2208 ,  G01N2223/07 ,  G01N2223/072 ,  G01N2223/074 ,  G01N2223/1016 ,  G01N2223/3037 ,  G01N2223/616 ,  G21G1/12

Abstract: A method to determine a concentration of a target element in a sample is provide. The method comprises (i) positioning a sample containing a target element with respect to a reference material containing a reference element, (ii) simultaneously irradiating the sample and the reference material with Bremsstrahlung X-rays to thereby produce activated nuclei in the target element and to produce activated nuclei in the reference element, (iii) detecting deactivation gamma-rays' from the irradiated sample and deactivation gamma-rays from the irradiated reference material, (iv) determining a first number of detected deactivation gamma-rays from the irradiated sample and a second number of detected deactivation gamma-rays from the reference material, and (v) determining the concentration of the target element in the sample by first normalising the first number of detected deactivation gamma-rays from the irradiated sample by the second number of detected deactivation gamma-rays from the reference material. The variation of the reference element to target element cross section ratio over a range of electron beam energies is less than a predetermined measurement accuracy.

Abstract translation: 提供了确定样品中目标元素浓度的方法。 该方法包括（i）相对于包含参考元件的参考材料定位包含目标元素的样品，（ii）用Bre致辐射X射线同时照射样品和参考物质，从而在目标元素中产生活化的核， 在参考元件中产生活化的核，（iii）从照射的样品中检测去激活的γ射线，以及从照射的参考物质中去激活γ射线，（iv）从被照射样品中确定检测到的去激活γ射线的第一数量 和来自所述参考物质的检测到的去激活γ射线的第二数量，以及（v）通过首先将来自被照射的样品的检测到的去激活γ射线的第一数量归一化来确定样品中目标元素的浓度第二数目 检测到来自参考物质​​的失活γ射线。 参考元件与目标元件截面比在电子束能量范围内的变化小于预定的测量精度。