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prompt gamma-ray neutron activation analyzer
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工学
辐射型元素分析仪
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prompt gamma-ray neutron activation analyzer
瞬发γ射线中子活化分析仪
利用反应堆、加速器或同位素中子源产生的中子轰击被测样品,样品中原子核与中子发生核反应在极短的时间内,释放出不同能量(2千~10兆电子伏特)的特征γ射线,根据特征γ射线的能量以及强度对元素种类及含量进行实时在线测量的装置或仪器。
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group of monomial substitutions
group of motions
group of norms
group of operators
group of outer automorphism
group of outer permutations
group of parameters
group of paths
group of periods
group of permutations
group of points
group of projective transformations
group of quaternions
group of quotients
group of regular polyhedrons
group of representatives
group of right quotients
group of rings
group of rotations
group of semilinear substitutions
group of similarity transformations
group of spheres
group of stability
group of stars
group of substitutions
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