粒子是从天然放射性蜕变得到的带正电的氦核。
Alpha particles are positively charged helium nuclei obtained from natural radioactive decay.
天然放射性辐射环境与该区域内的地质环境密切相关。
There is close relationship between the radioactivity and the area's geology in environment.
程序在有天然放射性同位素和裂变产物存在下也是可用的。
In the presence of naturally radioactive isotopes and fission product...
氡是天然放射性惰性气体，是铀系衰变链中的一个衰变产物。
As a product from the uranium disintegration, radon is a natural radioactive idle gas.
报道了闽东南地区土壤岩石中天然放射性核素含量调查的结果。
This paper reports on the survey of natural radio nuclides in soil and rock conducted in Southeast Fujian.
这些天然放射性核素的活度浓度与其他国家报告的数据进行比较。
The measured activity concentrations for these natural radionuclide were compared with the reported data for other countries.
评价结果表明，下庄铀矿田的土壤中天然放射性水平处于正常范围。
The results show that there is a normal level of natural radioactivity of soil in the Xiazhuang granite uranium ore field.
基于钾的天然放射性，用放射性方法测定固体钾肥产品中的钾含量。
Based on the natural radioactivity of potassium, the contents of potassium in solid potash fertilizer products were determined by radioactivity method.
辐射来自于外层空间（宇宙射线），以及在土壤，水和空气中的天然放射性物质。
The radiation comes from space (cosmic rays) as well as natural radioactive materials found in the soil, water and air.
本文总结了全国环境天然放射性水平调查外照射测量的质量保证工作。
This paper summarizes the quality assurance work of external exposure measurement for national survey of environmental natural radioactive level.
调查结果表明，上海市各类水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bod-ies of the city was within normal natural background.
报导安徽省天然辐射的空气吸收剂量率和饮食中天然放射性核素的浓度。
This paper reports absorbed dose rate in air for natural radiation and concentration radionuclides for food.
通过大量的实验和野外测量，对城市环境天然放射性评价方法进行了研究。
The methods of urban environment's natural radioactivity were investigated through abundances of experiments and field measurements.
调查结果表明，宁夏回族自治区水体中天然放射性核素浓度属正常本底水平。
The results show that the radioactivity level of varied water bodies of the region was within normal natural background.
对西安市生活饮用水源黑河与灞河水体中天然放射性元素铀含量进行了调查。
The investigation results on natural uranium concentrations in drinking water sources, Hei River and Ba River, in Xi 'an City are presented in this paper.
大理石的天然放射性属于环境本底水平，花岗岩中放射性远远高于大理石产品。
Natural radioactivity in the marble is equal to the environmental level, radioactivity in the granite is much higher than that in marble.
本文报道了青海省江河、湖泊、水库、泉、井和自来水中天然放射性核素浓度的调查结果。
This paper reports the investigation results of natural radioactivity level in river, lake, reservoir, spring, well and tap water in Qirighai Province.
进入二十一世纪，我国部分省区开展系统的更加详细的天然放射性生态环境调查评价工作。
In the 21 century, the more detailed investigation of natural radiation environment evaluation was carried out in part of our country.
本文报道广东省(本调查包括现海南省在内)土壤中天然放射性核素含量调查的方法和结果。
This paper reports the methods and results of investigation of natural radionuclides in soil in Guangdong (include Hainan) Province.
本文报道了江苏省江河、湖泊、泉、井、近海海域和自来水中天然放射性核素浓度的调查结果。
This paper reports the investigation results of natural radioactivity level in river, lake. spring, well and tap water in Jiangsu Province.
本文报道了云南省江河、湖泊、水库、泉(温泉)、井和自来水中天然放射性核素浓度的调查结果。
This paper reports the investigation results of natural radioactivity level in river, lake, reservoir, spring, well, offshore water and tap water in Yunnan Province.
因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。
Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old.
本文报道了北京市河流、湖泊、水库、温泉、井和自来水中天然放射性核素浓度的调查方法及主要结果。
This paper reports the investigation results of natural radioactivity level in river, lake, reservoir, spring, well and tap water in Beijing City.
本文报道了湖北省江河、湖泊、水库、温泉、农村井水和城市自来水中天然放射性核素浓度的调查结果。
This paper reports the investigation results of natural radioactivity level in river, lake, reservoir, spring, well and tap water in Hubei Province.
结果：不同产地、不同品种的进口花岗岩石材样品中天然放射性核素的比活度与普通建筑材料比有较大差别。
The specific activities of natural radionuclides in import granites of different producing area and different varieties have biggish differences with those in normal building materials.
测定了在该泉水中养殖的鱼类及用该泉水灌溉生长的农作物和其他有关环境生物样品中天然放射性物质的含量。
The natural radioactive substance content was determined for fishes, in thermal spring water, farm products irrigated with such water and other biological samples.
中国土壤中天然放射性核素含量调查（1983—1990年）是中国环境天然放射性水平调查研究的一部分。
The survey of natural radionuclide contents in soil in China(1983—1990)is a part of investigation of environmental natural radioactivity level on China.
中国土壤中天然放射性核素含量调查（1983—1990年）是中国环境天然放射性水平调查研究的一部分。
The survey of natural radionuclide contents in soil in China(1983—1990)is a part of investigation of environmental natural radioactivity level on China.
应用推荐