沪江词库精选比活度英文怎么写、英语单词怎么写、例句等信息 specific activity 相似短语 To be specific prep.明确地讲 space specific and time specific 空间和时间的特性 Specific Addressing 特定寻址特殊寻址法,专用寻址法,绝对编址,特殊编址 specific absorptivity 比吸收系数 specific birefringence 特定双...
比活度1. Computerized γ-spectrometric specific activity-meter Model H-90B; H-90B微机γ能谱比活度测量仪2. It can be used both to automatically calculate contents of 40 K ,U and Th, and to fast measure the specific activity of natural radioactive nuclides 226 Ra, 232 Th and 40 K in ...
论述了以NaI(Tl)晶体为探测器的室内低本底多道γ射线能谱仪用于测量样品中226Ra、232Th和40K放射性比活度的两种计算方法———谱线分解法和特征能量峰法(逆矩阵法),并设计编制程序,分别采用这两种方法对样品谱线进行处理分析,将分析结果与高纯锗γ谱仪分析结果对比,两种方法分析同一样品的相对偏差均≤10%。2...
137Cs比活度1. 137Cs activities in purple surface soil on grass land have a good relationship with the medium grain size(d50)by sieving method,but do not have a defined relationship with the medium grain size(d50)by normal method. 紫色土草地表层土壤的137Cs比活度与样品的筛分中值粒径(d50)...
ad.窄束单色射线的衰减规律:基本概念(散射、吸收、衰减、窄束射线、线衰减系数、半值层)、公式、初步理解、简单计算[translate] aa.放射性:基本概念、放射性同位素;[translate] ab. X射线和γ射线:基本性质、本质、光量子概念[translate] ad.放射性同位素源的活度:概念、单位、比活度[translate]...
α比活度1. The a-specific activity of 234U is about three orders higher than that of 235U. ~(234)U的α比活度比~(235)U约高3个数量级,因此,可以根据样品α比活度的增加估计~(235)U的浓缩度。2) α activity ratio α活度比3) velocity ratio 速度比α 1. The influences of the thickness ...
d.放射性同位素源的活度:概念、单位、比活度问题补充:匿名 2013-05-23 12:21:38 D. activity of the radioactive isotope source: concept, organization, specific activity 匿名 2013-05-23 12:23:18 匿名 2013-05-23 12:24:58 匿名 2013-05-23 12:26:38 匿名 2013-05-23 12:28:18 ...
镭比活度计算法2) Radium equivalent activity 镭当量活度3) activity calculation 活度计算 例句>> 4) calculation formula for activity 活度计算式5) activity ratio method 活度比值法6) method of proportional computation 比例计算法补充资料:镭C′ 分子式:CAS号:性质:历史名称,是核素214Po。天然放射性...
放射性比活度 1. Two calculational methods for analyzing the spectrum which measured by indoor low background multi-channels gamma-rays spectometer(Na(Tl)) to get the specific activity of 226Ra, 232Th and 40K of the sample are discussed, they are the spectrum analysis method and the characteris...